/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/splice-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:24:51,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:24:51,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:24:51,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:24:51,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:24:51,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:24:51,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:24:51,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:24:51,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:24:51,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:24:51,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:24:51,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:24:51,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:24:51,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:24:51,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:24:51,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:24:51,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:24:51,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:24:51,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:24:51,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:24:51,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:24:51,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:24:51,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:24:51,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:24:51,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:24:51,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:24:51,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:24:51,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:24:51,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:24:51,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:24:51,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:24:51,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:24:51,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:24:51,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:24:51,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:24:51,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:24:51,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:24:51,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:24:51,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:24:51,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:24:51,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:24:51,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:24:51,232 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:24:51,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:24:51,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:24:51,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:24:51,238 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:24:51,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:24:51,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:24:51,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:24:51,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:24:51,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:24:51,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:24:51,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:24:51,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:24:51,242 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:24:51,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:24:51,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:24:51,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:24:51,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:24:51,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:24:51,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:24:51,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:24:51,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:24:51,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:24:51,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:24:51,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:24:51,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:24:51,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:24:51,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:24:51,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:24:51,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:24:51,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:24:51,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:24:51,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:24:51,758 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:24:51,759 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:24:51,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-2.i [2020-10-29 09:24:51,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26ef3e201/fa9366b0a8ab403ea1c0face5bdb0686/FLAG526acc943 [2020-10-29 09:24:52,621 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:24:52,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-2.i [2020-10-29 09:24:52,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26ef3e201/fa9366b0a8ab403ea1c0face5bdb0686/FLAG526acc943 [2020-10-29 09:24:52,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26ef3e201/fa9366b0a8ab403ea1c0face5bdb0686 [2020-10-29 09:24:52,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:24:52,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:24:52,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:52,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:24:52,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:24:52,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:52" (1/1) ... [2020-10-29 09:24:52,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c797de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:52, skipping insertion in model container [2020-10-29 09:24:52,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:52" (1/1) ... [2020-10-29 09:24:52,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:24:53,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:24:53,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:53,443 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:24:53,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:53,572 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:24:53,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53 WrapperNode [2020-10-29 09:24:53,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:53,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:24:53,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:24:53,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:24:53,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (1/1) ... [2020-10-29 09:24:53,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (1/1) ... [2020-10-29 09:24:53,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (1/1) ... [2020-10-29 09:24:53,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (1/1) ... [2020-10-29 09:24:53,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (1/1) ... [2020-10-29 09:24:53,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (1/1) ... [2020-10-29 09:24:53,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (1/1) ... [2020-10-29 09:24:53,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:24:53,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:24:53,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:24:53,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:24:53,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:24:53,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:24:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:24:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:24:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:24:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:24:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-29 09:24:53,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-29 09:24:53,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-29 09:24:53,755 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-29 09:24:53,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:24:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:24:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:24:53,756 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:24:53,756 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:24:53,756 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:24:53,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:24:53,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:24:53,756 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:24:53,757 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:24:53,757 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:24:53,757 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:24:53,757 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:24:53,757 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:24:53,757 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:24:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:24:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:24:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:24:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:24:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:24:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:24:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:24:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:24:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:24:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:24:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:24:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-29 09:24:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-29 09:24:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-29 09:24:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:24:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:24:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:24:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:24:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:24:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:24:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:24:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:24:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:24:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:24:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:24:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:24:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:24:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:24:53,762 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:24:53,762 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:24:53,762 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:24:53,762 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:24:53,762 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:24:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:24:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:24:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:24:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:24:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:24:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:24:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:24:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:24:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:24:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:24:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:24:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:24:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:24:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:24:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:24:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:24:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:24:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:24:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:24:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:24:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:24:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:24:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:24:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:24:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:24:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:24:53,767 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:24:53,767 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:24:53,767 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:24:53,767 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:24:53,767 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:24:53,767 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:24:53,767 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:24:53,768 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:24:53,768 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:24:53,768 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:24:53,768 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:24:53,768 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:24:53,768 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:24:53,768 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:24:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:24:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:24:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:24:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:24:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:24:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:24:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:24:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:24:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:24:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:24:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:24:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:24:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:24:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:24:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:24:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:24:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:24:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:24:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:24:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:24:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:24:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:24:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:24:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:24:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:24:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:24:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-29 09:24:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:24:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:24:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:24:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:24:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:24:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:24:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:24:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:24:53,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:24:53,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:24:54,186 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-29 09:24:54,440 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:24:54,441 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 09:24:54,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:54 BoogieIcfgContainer [2020-10-29 09:24:54,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:24:54,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:24:54,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:24:54,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:24:54,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:24:52" (1/3) ... [2020-10-29 09:24:54,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc1c349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:54, skipping insertion in model container [2020-10-29 09:24:54,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:53" (2/3) ... [2020-10-29 09:24:54,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc1c349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:54, skipping insertion in model container [2020-10-29 09:24:54,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:54" (3/3) ... [2020-10-29 09:24:54,466 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-2.i [2020-10-29 09:24:54,480 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:24:54,486 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:24:54,502 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:24:54,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:24:54,546 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:24:54,546 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:24:54,546 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:24:54,546 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:24:54,547 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:24:54,547 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:24:54,547 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:24:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-29 09:24:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:24:54,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:54,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:54,588 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash 455186036, now seen corresponding path program 1 times [2020-10-29 09:24:54,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:54,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618144847] [2020-10-29 09:24:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:54,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:54,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:55,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:55,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:55,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:55,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:24:55,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:24:55,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-29 09:24:55,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:55,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:55,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:24:55,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:24:55,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:24:55,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:24:55,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:55,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:55,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:55,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:55,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:55,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:24:55,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:55,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:55,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:55,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:55,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:55,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:55,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618144847] [2020-10-29 09:24:55,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:55,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:24:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584144303] [2020-10-29 09:24:55,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:24:55,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:55,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:24:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:24:55,783 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 5 states. [2020-10-29 09:24:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:55,981 INFO L93 Difference]: Finished difference Result 75 states and 110 transitions. [2020-10-29 09:24:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:55,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-29 09:24:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:55,993 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:24:55,993 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:24:55,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:24:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-29 09:24:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:24:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-29 09:24:56,037 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 18 [2020-10-29 09:24:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:56,037 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-29 09:24:56,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:24:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-29 09:24:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:24:56,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:56,039 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] [2020-10-29 09:24:56,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:24:56,040 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:56,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1785249473, now seen corresponding path program 1 times [2020-10-29 09:24:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:56,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642233121] [2020-10-29 09:24:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:56,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:56,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:24:56,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:24:56,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-29 09:24:56,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:56,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:56,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:24:56,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:24:56,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:24:56,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:56,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:56,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:56,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:56,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:24:56,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:56,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:56,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:56,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642233121] [2020-10-29 09:24:56,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:56,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:24:56,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241583949] [2020-10-29 09:24:56,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:24:56,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:56,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:24:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:24:56,665 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 5 states. [2020-10-29 09:24:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:56,782 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-10-29 09:24:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:56,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-29 09:24:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:56,785 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:24:56,785 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:24:56,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:24:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-29 09:24:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:24:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-29 09:24:56,797 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2020-10-29 09:24:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:56,797 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-29 09:24:56,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:24:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-29 09:24:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:24:56,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:56,799 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:56,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:24:56,800 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1469752795, now seen corresponding path program 1 times [2020-10-29 09:24:56,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:56,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632676231] [2020-10-29 09:24:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:56,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:56,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:24:56,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:56,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-29 09:24:56,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:56,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:24:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:24:56,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:56,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:56,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:56,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:56,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:56,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:56,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:56,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:56,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:56,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:56,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:56,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:56,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632676231] [2020-10-29 09:24:56,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:56,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:24:56,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032689528] [2020-10-29 09:24:56,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:24:56,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:56,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:24:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:24:56,948 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 5 states. [2020-10-29 09:24:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:57,062 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2020-10-29 09:24:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:24:57,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-29 09:24:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:57,064 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:24:57,064 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:24:57,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:57,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:24:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-29 09:24:57,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:24:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-10-29 09:24:57,074 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 23 [2020-10-29 09:24:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:57,074 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-10-29 09:24:57,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:24:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-10-29 09:24:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:24:57,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:57,076 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] [2020-10-29 09:24:57,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:24:57,076 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1289219814, now seen corresponding path program 1 times [2020-10-29 09:24:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:57,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262195640] [2020-10-29 09:24:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:57,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:57,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:57,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:24:57,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:57,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-29 09:24:57,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:57,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:57,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:57,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:57,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:24:57,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:57,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:57,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:57,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:57,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:57,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:57,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:57,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:57,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:57,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:57,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:57,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:57,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:57,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262195640] [2020-10-29 09:24:57,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:57,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:24:57,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344299444] [2020-10-29 09:24:57,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:24:57,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:24:57,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:24:57,548 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 11 states. [2020-10-29 09:24:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:57,869 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2020-10-29 09:24:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:24:57,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-29 09:24:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:57,872 INFO L225 Difference]: With dead ends: 87 [2020-10-29 09:24:57,872 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:24:57,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:24:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-10-29 09:24:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:24:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-10-29 09:24:57,883 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 29 [2020-10-29 09:24:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:57,884 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-10-29 09:24:57,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:24:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-10-29 09:24:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:24:57,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:57,885 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] [2020-10-29 09:24:57,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:24:57,886 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:57,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1316803740, now seen corresponding path program 1 times [2020-10-29 09:24:57,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:57,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100132956] [2020-10-29 09:24:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:57,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:57,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:24:57,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:57,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-29 09:24:57,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:57,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:24:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:24:57,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:58,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:58,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:58,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:58,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:58,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:58,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:58,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:58,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:58,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100132956] [2020-10-29 09:24:58,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:58,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:24:58,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731468943] [2020-10-29 09:24:58,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:24:58,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:58,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:24:58,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:24:58,031 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 4 states. [2020-10-29 09:24:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:58,152 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2020-10-29 09:24:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:24:58,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:24:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:58,154 INFO L225 Difference]: With dead ends: 109 [2020-10-29 09:24:58,154 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:24:58,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:24:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:24:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-29 09:24:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:24:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-29 09:24:58,163 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 29 [2020-10-29 09:24:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:58,164 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-29 09:24:58,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:24:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-29 09:24:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:24:58,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:58,165 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] [2020-10-29 09:24:58,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:24:58,166 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:58,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354507, now seen corresponding path program 1 times [2020-10-29 09:24:58,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:58,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558300258] [2020-10-29 09:24:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:58,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:58,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:58,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:24:58,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:58,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-29 09:24:58,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:58,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:58,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:24:58,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:24:58,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:24:58,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:58,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:58,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:58,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:58,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:58,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:58,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:58,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:58,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:58,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:58,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:58,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:58,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:58,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558300258] [2020-10-29 09:24:58,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:58,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:24:58,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366888873] [2020-10-29 09:24:58,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:24:58,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:24:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:24:58,435 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 7 states. [2020-10-29 09:24:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:58,643 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-10-29 09:24:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:24:58,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-29 09:24:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:58,645 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:24:58,645 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:24:58,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:24:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:24:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-29 09:24:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:24:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-29 09:24:58,655 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 31 [2020-10-29 09:24:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:58,655 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-29 09:24:58,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:24:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-29 09:24:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:24:58,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:58,657 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:58,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:24:58,657 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2040267893, now seen corresponding path program 2 times [2020-10-29 09:24:58,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:58,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387529618] [2020-10-29 09:24:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:59,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:24:59,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-29 09:24:59,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:59,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:59,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:24:59,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:59,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:59,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:59,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:59,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:59,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:59,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387529618] [2020-10-29 09:24:59,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:59,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:24:59,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608757915] [2020-10-29 09:24:59,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:24:59,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:59,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:24:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:24:59,440 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 12 states. [2020-10-29 09:24:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:59,925 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-10-29 09:24:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:24:59,926 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:24:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:59,927 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:24:59,927 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:24:59,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:24:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:24:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-10-29 09:24:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:24:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-10-29 09:24:59,935 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 32 [2020-10-29 09:24:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:59,935 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-10-29 09:24:59,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:24:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-10-29 09:24:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:24:59,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:59,937 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 09:24:59,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:24:59,937 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:59,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1927347279, now seen corresponding path program 3 times [2020-10-29 09:24:59,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:59,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514524377] [2020-10-29 09:24:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:59,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:00,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:00,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:00,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:25:00,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:00,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-29 09:25:00,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:00,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:25:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:25:00,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:01,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:01,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:01,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:01,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:01,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:01,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:01,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:01,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:01,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514524377] [2020-10-29 09:25:01,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:01,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:25:01,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202149012] [2020-10-29 09:25:01,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:25:01,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:01,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:25:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:25:01,152 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 15 states. [2020-10-29 09:25:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:02,258 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-29 09:25:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:25:02,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-29 09:25:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:02,259 INFO L225 Difference]: With dead ends: 90 [2020-10-29 09:25:02,259 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:25:02,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:25:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:25:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-29 09:25:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:25:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-29 09:25:02,269 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 35 [2020-10-29 09:25:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:02,269 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-29 09:25:02,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:25:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-29 09:25:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:25:02,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:02,271 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:02,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:25:02,271 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:02,272 INFO L82 PathProgramCache]: Analyzing trace with hash 238403537, now seen corresponding path program 1 times [2020-10-29 09:25:02,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:02,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894604480] [2020-10-29 09:25:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:02,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:03,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:03,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:25:03,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:03,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-29 09:25:03,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:03,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:25:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:25:03,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:04,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:04,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:04,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:04,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:04,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:04,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:25:04,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:04,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:04,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:04,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:04,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:04,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:04,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894604480] [2020-10-29 09:25:04,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:04,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:25:04,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210352862] [2020-10-29 09:25:04,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:25:04,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:04,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:25:04,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:25:04,346 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 15 states. [2020-10-29 09:25:04,809 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2020-10-29 09:25:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:05,345 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-29 09:25:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:25:05,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-29 09:25:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:05,352 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:25:05,352 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:25:05,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:25:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:25:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2020-10-29 09:25:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:25:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-10-29 09:25:05,362 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 35 [2020-10-29 09:25:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:05,362 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-10-29 09:25:05,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:25:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-10-29 09:25:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:25:05,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:05,364 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 09:25:05,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:25:05,364 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1775194400, now seen corresponding path program 4 times [2020-10-29 09:25:05,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:05,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986165574] [2020-10-29 09:25:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:05,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:05,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:05,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:25:05,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:05,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-29 09:25:05,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:05,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:05,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:25:05,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:25:05,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:25:05,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:05,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:05,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:05,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:05,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:05,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:05,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:05,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:05,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:25:05,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986165574] [2020-10-29 09:25:05,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:25:05,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:25:05,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484110643] [2020-10-29 09:25:05,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:25:05,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:25:05,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:25:05,585 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 4 states. [2020-10-29 09:25:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:05,725 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2020-10-29 09:25:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:25:05,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-29 09:25:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:05,729 INFO L225 Difference]: With dead ends: 133 [2020-10-29 09:25:05,729 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:25:05,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:25:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:25:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-29 09:25:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:25:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-29 09:25:05,747 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 38 [2020-10-29 09:25:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:05,747 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-29 09:25:05,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:25:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-29 09:25:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:25:05,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:05,750 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:05,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:25:05,751 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1620859808, now seen corresponding path program 1 times [2020-10-29 09:25:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:05,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681387249] [2020-10-29 09:25:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:06,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:06,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:25:06,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:06,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-29 09:25:06,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:06,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:25:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:25:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:07,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:07,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:07,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:07,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:07,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:25:07,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:07,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:07,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:07,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:07,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:07,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:07,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681387249] [2020-10-29 09:25:07,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:07,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:25:07,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619428014] [2020-10-29 09:25:07,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:25:07,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:07,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:25:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:25:07,076 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 18 states. [2020-10-29 09:25:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:07,763 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-29 09:25:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:25:07,764 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-29 09:25:07,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:07,765 INFO L225 Difference]: With dead ends: 89 [2020-10-29 09:25:07,765 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:25:07,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:25:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:25:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-29 09:25:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:25:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-29 09:25:07,774 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 38 [2020-10-29 09:25:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:07,774 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-29 09:25:07,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:25:07,775 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-29 09:25:07,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:25:07,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:07,776 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:07,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:25:07,776 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash -195172683, now seen corresponding path program 1 times [2020-10-29 09:25:07,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:07,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142741105] [2020-10-29 09:25:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:07,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:07,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:08,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:08,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:10,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:10,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:25:10,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:25:10,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-29 09:25:10,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:10,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:10,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:25:10,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:10,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:25:10,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:25:10,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:10,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:10,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:10,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:10,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:10,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:25:10,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:10,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:10,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:10,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:10,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:10,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:25:10,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142741105] [2020-10-29 09:25:10,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:10,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:25:10,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038408566] [2020-10-29 09:25:10,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:25:10,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:10,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:25:10,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:25:10,348 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 7 states. [2020-10-29 09:25:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:10,586 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-10-29 09:25:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:25:10,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-29 09:25:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:10,588 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:25:10,589 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:25:10,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:25:10,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:25:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-10-29 09:25:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:25:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-29 09:25:10,598 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 40 [2020-10-29 09:25:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:10,598 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-29 09:25:10,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:25:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-29 09:25:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:25:10,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:10,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:10,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:25:10,603 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:10,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1448158459, now seen corresponding path program 1 times [2020-10-29 09:25:10,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:10,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88183870] [2020-10-29 09:25:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:10,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:10,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:10,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:25:10,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:10,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-29 09:25:10,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:10,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:25:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 09:25:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:25:10,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:11,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:11,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:11,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:11,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:11,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:11,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:11,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:11,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:11,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 09:25:11,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88183870] [2020-10-29 09:25:11,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:11,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:25:11,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438558364] [2020-10-29 09:25:11,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:25:11,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:11,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:25:11,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:25:11,020 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 8 states. [2020-10-29 09:25:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:11,260 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-29 09:25:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:25:11,261 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-29 09:25:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:11,262 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:25:11,262 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:25:11,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:25:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:25:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2020-10-29 09:25:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 09:25:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-10-29 09:25:11,273 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 40 [2020-10-29 09:25:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:11,273 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-10-29 09:25:11,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:25:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-10-29 09:25:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:25:11,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:11,274 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-29 09:25:11,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:25:11,274 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:11,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:11,275 INFO L82 PathProgramCache]: Analyzing trace with hash 577987439, now seen corresponding path program 2 times [2020-10-29 09:25:11,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:11,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073619170] [2020-10-29 09:25:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:11,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:12,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:12,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:25:12,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:12,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-29 09:25:12,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:12,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:25:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:25:12,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:12,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:12,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:12,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:12,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:12,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:12,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:25:12,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:12,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:12,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:12,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073619170] [2020-10-29 09:25:12,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:12,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:25:12,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166818865] [2020-10-29 09:25:12,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:25:12,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:25:12,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:25:12,596 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 16 states. [2020-10-29 09:25:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:14,054 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-29 09:25:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:25:14,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-29 09:25:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:14,057 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:25:14,057 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:25:14,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:25:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:25:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-10-29 09:25:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 09:25:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-10-29 09:25:14,068 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 41 [2020-10-29 09:25:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:14,068 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-10-29 09:25:14,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:25:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-10-29 09:25:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:25:14,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:14,072 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:14,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:25:14,072 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash -586644026, now seen corresponding path program 2 times [2020-10-29 09:25:14,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:14,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895683540] [2020-10-29 09:25:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:14,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:15,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:17,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:17,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:25:17,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:25:17,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3006 [2020-10-29 09:25:17,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:17,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:17,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:25:17,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:17,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:25:17,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:17,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:17,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:17,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:17,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:17,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:25:17,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:17,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:17,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:17,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:17,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895683540] [2020-10-29 09:25:17,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:17,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:25:17,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569451320] [2020-10-29 09:25:17,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:25:17,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:25:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:25:17,697 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 17 states. [2020-10-29 09:25:18,443 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-29 09:25:18,661 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-29 09:25:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:19,525 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-10-29 09:25:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:25:19,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-29 09:25:19,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:19,527 INFO L225 Difference]: With dead ends: 105 [2020-10-29 09:25:19,527 INFO L226 Difference]: Without dead ends: 98 [2020-10-29 09:25:19,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:25:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-29 09:25:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-29 09:25:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:25:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-10-29 09:25:19,538 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 41 [2020-10-29 09:25:19,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:19,538 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-10-29 09:25:19,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:25:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-10-29 09:25:19,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:25:19,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:19,539 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:19,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:25:19,539 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1511150448, now seen corresponding path program 1 times [2020-10-29 09:25:19,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:19,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972861930] [2020-10-29 09:25:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:20,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:20,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:25:20,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:20,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-29 09:25:20,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:20,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:20,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:25:20,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:20,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:25:20,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:20,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:20,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:20,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:20,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:20,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:20,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:20,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:20,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:25:20,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972861930] [2020-10-29 09:25:20,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:20,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:25:20,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240536657] [2020-10-29 09:25:20,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:25:20,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:20,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:25:20,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:25:20,787 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 17 states. [2020-10-29 09:25:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:21,814 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2020-10-29 09:25:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:25:21,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-29 09:25:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:21,819 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:25:21,819 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 09:25:21,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:25:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 09:25:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-29 09:25:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:25:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-29 09:25:21,835 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 42 [2020-10-29 09:25:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:21,836 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-29 09:25:21,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:25:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-29 09:25:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:25:21,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:21,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:21,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:25:21,837 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash -478169365, now seen corresponding path program 1 times [2020-10-29 09:25:21,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:21,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383883453] [2020-10-29 09:25:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:21,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:22,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:22,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:25:22,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:22,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-29 09:25:22,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:22,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:22,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:25:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 09:25:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:25:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:22,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:22,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:22,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:22,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:22,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:22,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:22,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:22,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:22,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:22,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-29 09:25:22,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383883453] [2020-10-29 09:25:22,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:22,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:25:22,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952433450] [2020-10-29 09:25:22,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:25:22,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:22,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:25:22,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:25:22,224 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 7 states. [2020-10-29 09:25:22,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:22,417 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-29 09:25:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:25:22,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-29 09:25:22,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:22,419 INFO L225 Difference]: With dead ends: 111 [2020-10-29 09:25:22,419 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:25:22,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:25:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:25:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-10-29 09:25:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:25:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-29 09:25:22,429 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 44 [2020-10-29 09:25:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:22,430 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-29 09:25:22,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:25:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-29 09:25:22,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:25:22,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:22,430 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:22,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:25:22,431 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash -514974133, now seen corresponding path program 3 times [2020-10-29 09:25:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:22,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714408329] [2020-10-29 09:25:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:22,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:24,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:24,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:25:24,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:24,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2030 [2020-10-29 09:25:24,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:24,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:24,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:25:24,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:24,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:25:24,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:25,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:25,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:25,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:25,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:25,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:25:25,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:25,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:25,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:25,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714408329] [2020-10-29 09:25:25,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:25,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:25:25,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234741196] [2020-10-29 09:25:25,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:25:25,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:25,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:25:25,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:25:25,488 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 19 states. [2020-10-29 09:25:25,691 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-29 09:25:26,236 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-29 09:25:26,437 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-29 09:25:26,611 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-29 09:25:26,802 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-29 09:25:27,370 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-29 09:25:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:27,917 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2020-10-29 09:25:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:25:27,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-29 09:25:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:27,918 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:25:27,919 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:25:27,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:25:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:25:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2020-10-29 09:25:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:25:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-10-29 09:25:27,929 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 44 [2020-10-29 09:25:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:27,929 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-10-29 09:25:27,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:25:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-10-29 09:25:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:25:27,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:27,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:27,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:25:27,930 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:27,931 INFO L82 PathProgramCache]: Analyzing trace with hash -675996252, now seen corresponding path program 4 times [2020-10-29 09:25:27,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:27,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667224780] [2020-10-29 09:25:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:27,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:28,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:28,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:25:28,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:28,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-29 09:25:28,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:28,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:28,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:25:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:25:28,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:30,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:30,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:30,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:30,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:30,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:30,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:30,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:30,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:30,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:30,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:30,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:30,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667224780] [2020-10-29 09:25:30,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:30,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:25:30,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93395509] [2020-10-29 09:25:30,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:25:30,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:30,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:25:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:25:30,099 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 21 states. [2020-10-29 09:25:30,822 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-29 09:25:31,004 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-29 09:25:31,619 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-29 09:25:32,197 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-29 09:25:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:32,688 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-10-29 09:25:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:25:32,689 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-29 09:25:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:32,690 INFO L225 Difference]: With dead ends: 109 [2020-10-29 09:25:32,690 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:25:32,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:25:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:25:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2020-10-29 09:25:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 09:25:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2020-10-29 09:25:32,706 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 47 [2020-10-29 09:25:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:32,706 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2020-10-29 09:25:32,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:25:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2020-10-29 09:25:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:25:32,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:32,707 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:32,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:25:32,708 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash 765395837, now seen corresponding path program 3 times [2020-10-29 09:25:32,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:32,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129802848] [2020-10-29 09:25:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:32,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:36,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:36,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:25:36,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:36,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3385 [2020-10-29 09:25:36,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:36,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:36,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:25:36,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:36,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:25:36,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:25:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:37,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:37,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:37,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:37,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:37,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:25:37,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:37,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:37,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:37,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:37,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:37,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:37,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129802848] [2020-10-29 09:25:37,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:37,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:25:37,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254814726] [2020-10-29 09:25:37,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:25:37,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:25:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:25:37,203 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand 20 states. [2020-10-29 09:25:38,231 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-29 09:25:38,450 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2020-10-29 09:25:38,647 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-29 09:25:38,987 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-29 09:25:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:39,490 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2020-10-29 09:25:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:25:39,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-29 09:25:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:39,494 INFO L225 Difference]: With dead ends: 105 [2020-10-29 09:25:39,494 INFO L226 Difference]: Without dead ends: 98 [2020-10-29 09:25:39,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:25:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-29 09:25:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-10-29 09:25:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:25:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-29 09:25:39,506 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 47 [2020-10-29 09:25:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:39,506 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-29 09:25:39,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:25:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-29 09:25:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:25:39,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:39,507 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:39,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:25:39,507 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1580605177, now seen corresponding path program 2 times [2020-10-29 09:25:39,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:39,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923912719] [2020-10-29 09:25:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:39,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:42,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:42,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:25:42,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:25:42,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2725 [2020-10-29 09:25:42,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:42,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:42,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:25:42,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:42,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:25:42,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:43,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:43,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:43,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:43,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:43,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:43,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:43,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:43,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:43,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:43,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923912719] [2020-10-29 09:25:43,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:43,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:25:43,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075676560] [2020-10-29 09:25:43,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:25:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:25:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:25:43,087 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 20 states. [2020-10-29 09:25:43,746 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-29 09:25:43,942 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-29 09:25:44,251 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-29 09:25:44,451 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-29 09:25:44,630 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-29 09:25:46,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:46,027 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-10-29 09:25:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:25:46,028 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-29 09:25:46,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:46,029 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:25:46,030 INFO L226 Difference]: Without dead ends: 122 [2020-10-29 09:25:46,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:25:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-29 09:25:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2020-10-29 09:25:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:25:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2020-10-29 09:25:46,041 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 49 [2020-10-29 09:25:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:46,041 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2020-10-29 09:25:46,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:25:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2020-10-29 09:25:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:25:46,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:46,042 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-29 09:25:46,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:25:46,042 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1071030977, now seen corresponding path program 2 times [2020-10-29 09:25:46,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:46,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420042435] [2020-10-29 09:25:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:46,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:47,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:47,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:25:47,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:47,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1170 [2020-10-29 09:25:47,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:47,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:25:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:25:47,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:48,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:48,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:48,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:48,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:48,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:48,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:48,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:48,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420042435] [2020-10-29 09:25:48,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:48,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:25:48,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537118033] [2020-10-29 09:25:48,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:25:48,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:25:48,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:25:48,593 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 25 states. [2020-10-29 09:25:49,367 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-29 09:25:49,728 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2020-10-29 09:25:49,952 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-29 09:25:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:51,606 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2020-10-29 09:25:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:25:51,607 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-10-29 09:25:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:51,608 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:25:51,608 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:25:51,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:25:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:25:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2020-10-29 09:25:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:25:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2020-10-29 09:25:51,623 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 49 [2020-10-29 09:25:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:51,623 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-10-29 09:25:51,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:25:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2020-10-29 09:25:51,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:25:51,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:51,624 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-10-29 09:25:51,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:25:51,624 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 472584621, now seen corresponding path program 5 times [2020-10-29 09:25:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:51,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837994803] [2020-10-29 09:25:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:51,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:52,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:52,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1253 [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:25:52,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:53,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:53,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:53,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:53,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:53,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:53,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:53,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:53,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:53,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:53,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837994803] [2020-10-29 09:25:53,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:53,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:25:53,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150506210] [2020-10-29 09:25:53,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:25:53,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:25:53,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:25:53,891 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand 20 states. [2020-10-29 09:25:54,128 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-29 09:25:54,757 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-29 09:25:54,994 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-29 09:25:55,721 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-29 09:25:56,071 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-29 09:25:56,500 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-29 09:25:56,690 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-29 09:25:56,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:56,961 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-10-29 09:25:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:25:56,961 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-29 09:25:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:56,963 INFO L225 Difference]: With dead ends: 117 [2020-10-29 09:25:56,963 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 09:25:56,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:25:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 09:25:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-10-29 09:25:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:25:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2020-10-29 09:25:56,981 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 50 [2020-10-29 09:25:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:56,981 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2020-10-29 09:25:56,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:25:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2020-10-29 09:25:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:25:56,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:56,982 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:56,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:25:56,983 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash -98717388, now seen corresponding path program 6 times [2020-10-29 09:25:56,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:56,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431631959] [2020-10-29 09:25:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:57,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:59,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:59,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:25:59,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:59,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2768 [2020-10-29 09:25:59,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:59,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:59,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:25:59,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:59,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:25:59,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:00,257 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-29 09:26:01,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:01,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:01,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:01,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:01,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:01,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:26:01,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:01,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:01,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:01,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:01,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431631959] [2020-10-29 09:26:01,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:01,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:26:01,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495904648] [2020-10-29 09:26:01,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:26:01,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:01,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:26:01,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:26:01,102 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 21 states. [2020-10-29 09:26:01,887 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-29 09:26:02,087 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-29 09:26:02,663 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-29 09:26:03,032 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-29 09:26:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:03,433 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2020-10-29 09:26:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:26:03,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-29 09:26:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:03,435 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:26:03,435 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 09:26:03,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:26:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 09:26:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-10-29 09:26:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:26:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-10-29 09:26:03,447 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 50 [2020-10-29 09:26:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:03,448 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-10-29 09:26:03,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:26:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-10-29 09:26:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:26:03,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:03,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:03,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:26:03,449 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash -90643500, now seen corresponding path program 2 times [2020-10-29 09:26:03,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:03,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436343594] [2020-10-29 09:26:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:03,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:04,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:04,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3735 [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:26:07,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:07,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:07,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:07,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:07,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:07,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:07,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:26:07,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:07,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:07,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:07,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:07,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:07,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-29 09:26:07,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436343594] [2020-10-29 09:26:07,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:07,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:26:07,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288788139] [2020-10-29 09:26:07,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:26:07,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:26:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:26:07,318 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 9 states. [2020-10-29 09:26:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:07,711 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2020-10-29 09:26:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:26:07,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-29 09:26:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:07,714 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:26:07,714 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:26:07,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:26:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:26:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2020-10-29 09:26:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-29 09:26:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2020-10-29 09:26:07,729 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 51 [2020-10-29 09:26:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:07,730 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2020-10-29 09:26:07,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:26:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2020-10-29 09:26:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:26:07,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:07,731 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-29 09:26:07,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:26:07,731 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1552687642, now seen corresponding path program 3 times [2020-10-29 09:26:07,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:07,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678970068] [2020-10-29 09:26:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:07,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:07,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:08,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:09,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:11,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:11,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:26:11,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:26:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3453 [2020-10-29 09:26:11,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:11,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:26:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:26:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:11,659 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-10-29 09:26:12,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:12,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:12,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:12,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678970068] [2020-10-29 09:26:12,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:12,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:26:12,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923296895] [2020-10-29 09:26:12,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:26:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:26:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:26:12,897 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 24 states. [2020-10-29 09:26:13,723 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-29 09:26:13,906 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-29 09:26:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:15,547 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2020-10-29 09:26:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:26:15,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-10-29 09:26:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:15,549 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:26:15,549 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:26:15,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:26:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:26:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2020-10-29 09:26:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-29 09:26:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2020-10-29 09:26:15,562 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 51 [2020-10-29 09:26:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:15,562 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2020-10-29 09:26:15,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:26:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2020-10-29 09:26:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:26:15,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:15,563 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-29 09:26:15,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:26:15,564 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash 157146607, now seen corresponding path program 3 times [2020-10-29 09:26:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:15,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212661574] [2020-10-29 09:26:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:15,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:16,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:16,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:26:16,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:16,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-29 09:26:16,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:16,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:26:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:26:16,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:17,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:17,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:17,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:17,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:17,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:17,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:17,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:17,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:26:17,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212661574] [2020-10-29 09:26:17,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:17,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:26:17,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81762810] [2020-10-29 09:26:17,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:26:17,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:17,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:26:17,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:26:17,762 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand 22 states. [2020-10-29 09:26:18,102 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-29 09:26:18,679 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-10-29 09:26:18,897 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-29 09:26:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:20,539 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-10-29 09:26:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:26:20,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-29 09:26:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:20,541 INFO L225 Difference]: With dead ends: 126 [2020-10-29 09:26:20,541 INFO L226 Difference]: Without dead ends: 122 [2020-10-29 09:26:20,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:26:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-29 09:26:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2020-10-29 09:26:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 09:26:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2020-10-29 09:26:20,554 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 53 [2020-10-29 09:26:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:20,554 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2020-10-29 09:26:20,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:26:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2020-10-29 09:26:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:26:20,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:20,555 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:20,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:26:20,556 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:20,556 INFO L82 PathProgramCache]: Analyzing trace with hash 458110491, now seen corresponding path program 7 times [2020-10-29 09:26:20,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:20,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363944063] [2020-10-29 09:26:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:21,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:22,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:22,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:26:22,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:26:22,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-29 09:26:22,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:22,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:22,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:26:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:26:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:23,024 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 09:26:23,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:23,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:23,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:23,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:23,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:23,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:23,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:23,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363944063] [2020-10-29 09:26:23,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:23,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:26:23,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130963630] [2020-10-29 09:26:23,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:26:23,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:26:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:26:23,935 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand 23 states. [2020-10-29 09:26:24,713 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-29 09:26:24,924 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-29 09:26:25,377 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-29 09:26:25,919 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-29 09:26:26,526 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-29 09:26:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:27,333 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2020-10-29 09:26:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:26:27,334 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-29 09:26:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:27,335 INFO L225 Difference]: With dead ends: 139 [2020-10-29 09:26:27,335 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 09:26:27,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:26:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 09:26:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-10-29 09:26:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:26:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2020-10-29 09:26:27,350 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 53 [2020-10-29 09:26:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:27,351 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2020-10-29 09:26:27,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:26:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2020-10-29 09:26:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:26:27,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:27,352 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-29 09:26:27,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:26:27,352 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:27,352 INFO L82 PathProgramCache]: Analyzing trace with hash 732499082, now seen corresponding path program 2 times [2020-10-29 09:26:27,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:27,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173655107] [2020-10-29 09:26:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:27,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:27,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:31,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:31,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:26:31,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:26:31,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3745 [2020-10-29 09:26:31,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:31,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:31,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:26:31,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:31,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:26:31,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:32,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:32,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:32,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:32,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:32,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:32,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:32,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:32,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:32,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:26:32,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173655107] [2020-10-29 09:26:32,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:32,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:26:32,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128732686] [2020-10-29 09:26:32,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:26:32,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:32,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:26:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:26:32,237 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 21 states. [2020-10-29 09:26:33,003 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-29 09:26:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:34,028 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2020-10-29 09:26:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:26:34,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-29 09:26:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:34,030 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:26:34,030 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:26:34,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:26:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:26:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-29 09:26:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:26:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-10-29 09:26:34,041 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 55 [2020-10-29 09:26:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:34,042 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-10-29 09:26:34,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:26:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-10-29 09:26:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:26:34,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:34,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:34,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:26:34,043 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1861152298, now seen corresponding path program 8 times [2020-10-29 09:26:34,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:34,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863272843] [2020-10-29 09:26:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:34,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:35,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:35,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:26:35,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:35,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-29 09:26:35,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:35,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:26:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:26:35,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:36,246 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-29 09:26:37,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:37,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:37,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:37,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:37,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:37,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:37,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:37,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:37,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:37,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863272843] [2020-10-29 09:26:37,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:37,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:26:37,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944289845] [2020-10-29 09:26:37,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:26:37,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:26:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:26:37,308 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-10-29 09:26:37,995 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-29 09:26:38,187 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-29 09:26:38,431 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-29 09:26:38,735 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-29 09:26:39,071 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-29 09:26:39,458 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-29 09:26:39,831 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-29 09:26:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:41,008 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2020-10-29 09:26:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:26:41,009 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-29 09:26:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:41,010 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:26:41,010 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 09:26:41,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=248, Invalid=2008, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:26:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 09:26:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2020-10-29 09:26:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 09:26:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2020-10-29 09:26:41,023 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 56 [2020-10-29 09:26:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:41,023 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2020-10-29 09:26:41,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:26:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2020-10-29 09:26:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:26:41,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:41,024 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:41,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:26:41,025 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1643658271, now seen corresponding path program 9 times [2020-10-29 09:26:41,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:41,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769778642] [2020-10-29 09:26:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:41,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:41,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:43,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:43,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:26:43,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:26:43,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2113 [2020-10-29 09:26:43,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:43,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:26:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:26:43,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:43,640 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-29 09:26:43,934 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-29 09:26:44,203 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 09:26:44,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:44,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:44,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:44,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:44,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:44,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:44,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:44,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:44,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:44,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:44,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:44,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:44,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769778642] [2020-10-29 09:26:44,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:44,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:26:44,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560690780] [2020-10-29 09:26:44,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:26:44,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:44,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:26:44,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:26:44,950 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 24 states. [2020-10-29 09:26:45,739 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-29 09:26:46,078 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-29 09:26:46,283 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-29 09:26:46,502 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-29 09:26:46,763 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2020-10-29 09:26:47,108 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2020-10-29 09:26:47,749 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 61 [2020-10-29 09:26:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:48,433 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-29 09:26:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:26:48,434 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-29 09:26:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:48,435 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:26:48,435 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 09:26:48,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:26:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 09:26:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-10-29 09:26:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 09:26:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-10-29 09:26:48,445 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 56 [2020-10-29 09:26:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:48,445 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-10-29 09:26:48,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:26:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-10-29 09:26:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:26:48,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:48,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:48,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:26:48,447 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash 811978411, now seen corresponding path program 3 times [2020-10-29 09:26:48,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:48,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808427243] [2020-10-29 09:26:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:48,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:51,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:51,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:26:51,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:26:51,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2715 [2020-10-29 09:26:51,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:51,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:26:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:26:51,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:52,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:52,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:52,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:52,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:26:52,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808427243] [2020-10-29 09:26:52,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:52,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:26:52,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864362205] [2020-10-29 09:26:52,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:26:52,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:52,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:26:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:26:52,065 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 21 states. [2020-10-29 09:26:52,420 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-29 09:26:53,016 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-29 09:26:53,193 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-29 09:26:54,045 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-29 09:26:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:54,932 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-29 09:26:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:26:54,933 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-10-29 09:26:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:54,934 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:26:54,934 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:26:54,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:26:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:26:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2020-10-29 09:26:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 09:26:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2020-10-29 09:26:54,948 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 58 [2020-10-29 09:26:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:54,948 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2020-10-29 09:26:54,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:26:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2020-10-29 09:26:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:26:54,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:54,949 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:54,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:26:54,949 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:54,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1839657743, now seen corresponding path program 4 times [2020-10-29 09:26:54,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:54,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828708725] [2020-10-29 09:26:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:55,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:56,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:56,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:26:56,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:56,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-29 09:26:56,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:56,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:56,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:26:56,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:56,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:26:56,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:57,279 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-29 09:26:57,404 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-29 09:26:57,599 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-29 09:26:57,742 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-29 09:26:57,906 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-29 09:26:58,061 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-29 09:26:58,350 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-29 09:26:58,539 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-29 09:26:59,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:59,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:59,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:59,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:59,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:59,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:59,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:59,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:59,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:59,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:59,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:59,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828708725] [2020-10-29 09:26:59,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:59,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:26:59,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449346372] [2020-10-29 09:26:59,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:26:59,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:59,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:26:59,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:26:59,513 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand 27 states. [2020-10-29 09:26:59,828 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-29 09:27:00,456 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-10-29 09:27:00,795 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2020-10-29 09:27:01,094 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-29 09:27:01,367 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-29 09:27:01,636 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 09:27:01,838 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-29 09:27:02,309 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-29 09:27:02,541 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-29 09:27:03,020 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-29 09:27:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:03,918 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-10-29 09:27:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:27:03,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-29 09:27:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:03,920 INFO L225 Difference]: With dead ends: 121 [2020-10-29 09:27:03,920 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:27:03,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:27:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:27:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2020-10-29 09:27:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:27:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2020-10-29 09:27:03,935 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 58 [2020-10-29 09:27:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:03,936 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2020-10-29 09:27:03,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:27:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2020-10-29 09:27:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:27:03,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:03,937 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:03,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:27:03,937 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1734900281, now seen corresponding path program 10 times [2020-10-29 09:27:03,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:03,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347870411] [2020-10-29 09:27:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:03,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:05,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:05,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:27:05,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:05,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1381 [2020-10-29 09:27:05,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:05,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:27:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:05,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:27:05,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:05,774 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-29 09:27:05,964 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-29 09:27:06,131 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-29 09:27:06,308 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-29 09:27:06,829 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-29 09:27:07,140 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-29 09:27:07,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:07,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:07,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:07,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:07,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:07,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:07,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:07,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:07,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:07,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:07,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:07,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:07,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347870411] [2020-10-29 09:27:07,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:07,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:27:07,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811543111] [2020-10-29 09:27:07,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:27:07,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:27:07,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:27:07,755 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand 24 states. [2020-10-29 09:27:08,038 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:27:08,574 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-29 09:27:08,800 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-29 09:27:09,179 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-29 09:27:09,722 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-29 09:27:10,488 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-29 09:27:10,704 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-29 09:27:11,223 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-29 09:27:11,378 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:27:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:12,095 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-29 09:27:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:27:12,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-29 09:27:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:12,097 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:27:12,097 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:27:12,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:27:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:27:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2020-10-29 09:27:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:27:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-10-29 09:27:12,111 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 59 [2020-10-29 09:27:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:12,111 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-10-29 09:27:12,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:27:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2020-10-29 09:27:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:27:12,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:12,112 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:12,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:27:12,112 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:12,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1403371696, now seen corresponding path program 11 times [2020-10-29 09:27:12,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:12,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304020696] [2020-10-29 09:27:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:12,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:14,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1957 [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:27:14,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:14,594 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-29 09:27:14,726 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-29 09:27:14,993 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-29 09:27:15,125 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-29 09:27:15,264 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-29 09:27:15,449 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-29 09:27:15,629 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:27:16,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:16,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:16,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:16,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:16,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:16,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:27:16,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:16,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:16,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:16,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:16,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304020696] [2020-10-29 09:27:16,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:16,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:27:16,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105556218] [2020-10-29 09:27:16,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:27:16,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:16,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:27:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:27:16,654 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 27 states. [2020-10-29 09:27:17,476 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-29 09:27:17,817 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-29 09:27:18,071 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-29 09:27:18,312 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2020-10-29 09:27:18,724 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-10-29 09:27:19,195 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-10-29 09:27:19,411 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-29 09:27:19,891 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2020-10-29 09:27:20,161 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-29 09:27:20,627 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-10-29 09:27:21,323 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 09:27:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:22,489 INFO L93 Difference]: Finished difference Result 150 states and 169 transitions. [2020-10-29 09:27:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:27:22,490 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-29 09:27:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:22,491 INFO L225 Difference]: With dead ends: 150 [2020-10-29 09:27:22,491 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 09:27:22,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:27:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 09:27:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2020-10-29 09:27:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:27:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2020-10-29 09:27:22,511 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 59 [2020-10-29 09:27:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:22,511 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2020-10-29 09:27:22,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:27:22,511 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2020-10-29 09:27:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:27:22,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:22,512 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:22,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:27:22,513 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash -6590714, now seen corresponding path program 4 times [2020-10-29 09:27:22,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:22,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135019768] [2020-10-29 09:27:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:22,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:23,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4495 [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:27,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:27:27,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:27,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:27,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:27,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:27,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:27,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:27,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:27:27,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:27,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:27,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:27,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:27,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:27,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:27:27,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135019768] [2020-10-29 09:27:27,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:27,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:27:27,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036869694] [2020-10-29 09:27:27,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:27:27,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:27:27,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:27:27,785 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand 22 states. [2020-10-29 09:27:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:29,640 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2020-10-29 09:27:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:27:29,641 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-29 09:27:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:29,642 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:27:29,643 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 09:27:29,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:27:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 09:27:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 122. [2020-10-29 09:27:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:27:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2020-10-29 09:27:29,661 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 60 [2020-10-29 09:27:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:29,661 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2020-10-29 09:27:29,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:27:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2020-10-29 09:27:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:27:29,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:29,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:29,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:27:29,663 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1636740428, now seen corresponding path program 5 times [2020-10-29 09:27:29,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:29,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729377520] [2020-10-29 09:27:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:29,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:32,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2782 [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:27:32,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:33,156 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-29 09:27:33,299 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-29 09:27:33,471 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-29 09:27:33,605 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-29 09:27:33,878 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-29 09:27:34,042 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-29 09:27:34,245 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 40 [2020-10-29 09:27:34,479 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-29 09:27:35,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:35,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:35,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:35,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729377520] [2020-10-29 09:27:35,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:35,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:27:35,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689524599] [2020-10-29 09:27:35,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:27:35,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:35,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:27:35,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:27:35,206 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand 26 states. [2020-10-29 09:27:35,625 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-29 09:27:35,833 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-29 09:27:36,418 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2020-10-29 09:27:36,797 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-10-29 09:27:37,113 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-29 09:27:37,532 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-29 09:27:38,123 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 116 [2020-10-29 09:27:38,369 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-29 09:27:38,773 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-29 09:27:39,070 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-29 09:27:39,449 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-10-29 09:27:39,828 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-29 09:27:40,487 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-10-29 09:27:40,767 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-10-29 09:27:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:41,928 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-10-29 09:27:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:27:41,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-29 09:27:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:41,931 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:27:41,931 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:27:41,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:27:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:27:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2020-10-29 09:27:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:27:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2020-10-29 09:27:41,955 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 60 [2020-10-29 09:27:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:41,955 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2020-10-29 09:27:41,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:27:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2020-10-29 09:27:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:27:41,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:41,956 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:41,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:27:41,956 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -672504671, now seen corresponding path program 5 times [2020-10-29 09:27:41,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:41,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844056958] [2020-10-29 09:27:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:42,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:43,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:43,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:27:43,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:43,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1806 [2020-10-29 09:27:43,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:43,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:27:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:27:43,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:44,190 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-29 09:27:44,378 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-29 09:27:44,711 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-29 09:27:44,844 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-29 09:27:45,216 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-29 09:27:45,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:45,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:45,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:45,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:45,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:45,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:45,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:45,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:45,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:45,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:45,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:27:45,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844056958] [2020-10-29 09:27:45,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:45,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:27:45,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506659581] [2020-10-29 09:27:45,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:27:45,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:27:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:27:45,865 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 26 states. [2020-10-29 09:27:46,174 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-29 09:27:46,350 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-29 09:27:46,921 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-29 09:27:47,218 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-29 09:27:47,666 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-29 09:27:48,318 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2020-10-29 09:27:48,545 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-29 09:27:48,770 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 09:27:49,247 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-29 09:27:49,456 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-29 09:27:49,915 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-29 09:27:50,123 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-29 09:27:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:50,912 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-29 09:27:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:27:50,913 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-29 09:27:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:50,915 INFO L225 Difference]: With dead ends: 135 [2020-10-29 09:27:50,915 INFO L226 Difference]: Without dead ends: 131 [2020-10-29 09:27:50,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=282, Invalid=2474, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:27:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-29 09:27:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-10-29 09:27:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-29 09:27:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2020-10-29 09:27:50,937 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 62 [2020-10-29 09:27:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:50,937 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2020-10-29 09:27:50,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:27:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2020-10-29 09:27:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:27:50,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:50,939 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:50,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:27:50,939 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash -659259263, now seen corresponding path program 12 times [2020-10-29 09:27:50,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:50,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035473834] [2020-10-29 09:27:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:51,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:52,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:54,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:54,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:27:54,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:27:54,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3941 [2020-10-29 09:27:54,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:54,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:27:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:54,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:27:54,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:55,660 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-29 09:27:55,936 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-29 09:27:56,073 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-29 09:27:56,225 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-29 09:27:56,394 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-29 09:27:56,529 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-29 09:27:56,905 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-29 09:27:57,296 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-29 09:27:57,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:57,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:57,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:57,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:57,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:27:57,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:57,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:57,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:57,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035473834] [2020-10-29 09:27:57,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:57,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:27:57,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668187365] [2020-10-29 09:27:57,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:27:57,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:27:57,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:27:57,741 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 27 states. [2020-10-29 09:27:57,995 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-29 09:27:58,510 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-29 09:27:58,732 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-29 09:27:59,197 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-29 09:27:59,575 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 97 [2020-10-29 09:27:59,926 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-29 09:28:00,312 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-29 09:28:00,859 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-29 09:28:01,058 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-29 09:28:01,242 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-29 09:28:01,762 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-29 09:28:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:28:02,277 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2020-10-29 09:28:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:28:02,277 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-29 09:28:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:28:02,279 INFO L225 Difference]: With dead ends: 152 [2020-10-29 09:28:02,279 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:28:02,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:28:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:28:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2020-10-29 09:28:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 09:28:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2020-10-29 09:28:02,297 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 62 [2020-10-29 09:28:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:28:02,297 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2020-10-29 09:28:02,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:28:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2020-10-29 09:28:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:28:02,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:28:02,298 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:28:02,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:28:02,299 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:28:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:28:02,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1993429316, now seen corresponding path program 3 times [2020-10-29 09:28:02,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:28:02,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321294995] [2020-10-29 09:28:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:28:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:28:02,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:04,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1874 [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:28:04,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:28:04,640 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-29 09:28:06,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:28:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:28:06,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:06,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:28:06,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:28:06,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:28:06,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:28:06,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:28:06,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:28:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:28:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:28:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:28:06,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:28:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:28:06,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321294995] [2020-10-29 09:28:06,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:28:06,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:28:06,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172263716] [2020-10-29 09:28:06,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:28:06,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:28:06,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:28:06,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:28:06,174 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand 27 states. [2020-10-29 09:28:06,437 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-29 09:28:06,920 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-29 09:28:07,184 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-29 09:28:07,384 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-29 09:28:08,355 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-29 09:28:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:28:09,623 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2020-10-29 09:28:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:28:09,624 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-29 09:28:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:28:09,626 INFO L225 Difference]: With dead ends: 140 [2020-10-29 09:28:09,626 INFO L226 Difference]: Without dead ends: 136 [2020-10-29 09:28:09,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:28:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-29 09:28:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2020-10-29 09:28:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-29 09:28:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2020-10-29 09:28:09,644 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 64 [2020-10-29 09:28:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:28:09,644 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2020-10-29 09:28:09,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:28:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2020-10-29 09:28:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 09:28:09,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:28:09,646 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:28:09,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:28:09,646 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:28:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:28:09,646 INFO L82 PathProgramCache]: Analyzing trace with hash 187959214, now seen corresponding path program 13 times [2020-10-29 09:28:09,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:28:09,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708523872] [2020-10-29 09:28:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:28:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:28:09,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:11,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:28:11,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:28:11,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:28:11,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2171 [2020-10-29 09:28:11,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:28:11,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:28:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:28:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:28:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 09:28:11,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:28:12,506 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-29 09:28:12,915 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-29 09:28:13,055 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-29 09:28:13,281 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-29 09:28:13,464 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-29 09:28:13,662 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-29 09:28:13,905 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-10-29 09:28:14,133 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-29 09:28:14,314 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-29 09:28:14,461 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-29 09:28:14,615 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-29 09:28:15,195 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-29 09:28:15,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:28:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:28:15,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:15,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:28:15,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:28:15,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:28:15,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:28:15,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:28:15,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:28:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:28:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:28:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:28:15,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:28:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:28:15,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708523872] [2020-10-29 09:28:15,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:28:15,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:28:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97189351] [2020-10-29 09:28:15,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:28:15,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:28:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:28:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:28:15,782 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand 29 states. [2020-10-29 09:28:16,096 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-29 09:28:16,270 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-29 09:28:16,736 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-29 09:28:17,009 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-29 09:28:17,362 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-29 09:28:17,904 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-29 09:28:18,337 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 94 [2020-10-29 09:28:18,793 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-29 09:28:18,978 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-29 09:28:19,409 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2020-10-29 09:28:19,744 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-29 09:28:20,047 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-29 09:28:20,258 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-29 09:28:20,847 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-29 09:28:21,462 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-29 09:28:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:28:22,098 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2020-10-29 09:28:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:28:22,098 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-29 09:28:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:28:22,100 INFO L225 Difference]: With dead ends: 155 [2020-10-29 09:28:22,100 INFO L226 Difference]: Without dead ends: 151 [2020-10-29 09:28:22,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=289, Invalid=2791, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 09:28:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-29 09:28:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2020-10-29 09:28:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:28:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2020-10-29 09:28:22,126 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 65 [2020-10-29 09:28:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:28:22,126 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2020-10-29 09:28:22,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:28:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2020-10-29 09:28:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 09:28:22,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:28:22,127 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:28:22,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:28:22,127 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:28:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:28:22,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1485203143, now seen corresponding path program 14 times [2020-10-29 09:28:22,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:28:22,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544777904] [2020-10-29 09:28:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:28:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:28:22,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:23,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:25,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3571 [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:28:26,417 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-29 09:28:26,833 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-29 09:28:26,981 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-29 09:28:27,141 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-29 09:28:27,372 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-29 09:28:27,539 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-29 09:28:27,747 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-29 09:28:27,958 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-29 09:28:28,230 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-29 09:28:29,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:28:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:28:29,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:29,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:28:29,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:28:29,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:28:29,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:28:29,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:28:29,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:28:29,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:28:29,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:28:29,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:28:29,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:28:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:28:29,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544777904] [2020-10-29 09:28:29,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:28:29,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:28:29,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296263232] [2020-10-29 09:28:29,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:28:29,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:28:29,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:28:29,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:28:29,399 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand 29 states. [2020-10-29 09:28:30,304 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-29 09:28:30,525 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44