/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:41:01,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:41:01,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:41:01,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:41:01,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:41:01,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:41:01,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:41:01,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:41:01,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:41:01,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:41:01,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:41:01,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:41:01,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:41:01,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:41:01,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:41:01,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:41:01,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:41:01,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:41:01,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:41:01,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:41:01,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:41:01,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:41:01,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:41:01,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:41:01,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:41:01,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:41:01,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:41:01,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:41:01,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:41:01,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:41:01,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:41:01,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:41:01,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:41:01,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:41:01,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:41:01,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:41:01,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:41:01,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:41:01,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:41:01,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:41:01,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:41:01,393 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:41:01,425 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:41:01,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:41:01,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:41:01,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:41:01,428 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:41:01,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:41:01,429 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:41:01,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:41:01,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:41:01,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:41:01,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:41:01,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:41:01,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:41:01,431 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:41:01,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:41:01,432 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:41:01,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:41:01,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:41:01,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:41:01,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:41:01,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:41:01,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:41:01,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:41:01,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:41:01,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:41:01,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:41:01,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:41:01,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:41:01,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:41:01,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:41:01,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:41:01,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:41:01,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:41:01,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:41:01,854 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:41:01,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-2.i [2020-10-28 14:41:01,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/568955a6e/c03ae1944d6e44919d39dfd576eca6dc/FLAGf0f888e73 [2020-10-28 14:41:02,777 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:41:02,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-2.i [2020-10-28 14:41:02,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/568955a6e/c03ae1944d6e44919d39dfd576eca6dc/FLAGf0f888e73 [2020-10-28 14:41:02,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/568955a6e/c03ae1944d6e44919d39dfd576eca6dc [2020-10-28 14:41:03,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:41:03,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:41:03,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:41:03,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:41:03,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:41:03,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f44416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03, skipping insertion in model container [2020-10-28 14:41:03,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:41:03,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:41:03,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:41:03,492 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:41:03,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:41:03,606 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:41:03,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03 WrapperNode [2020-10-28 14:41:03,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:41:03,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:41:03,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:41:03,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:41:03,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (1/1) ... [2020-10-28 14:41:03,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:41:03,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:41:03,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:41:03,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:41:03,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:41:03,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:41:03,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:41:03,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:41:03,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:41:03,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:41:03,827 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:41:03,828 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-28 14:41:03,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:41:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:41:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:41:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:41:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:41:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:41:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:41:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:41:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:41:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:41:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:41:03,830 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:41:03,830 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:41:03,830 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:41:03,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:41:03,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:41:03,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:41:03,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:41:03,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:41:03,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:41:03,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:41:03,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:41:03,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:41:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:41:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:41:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:41:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:41:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:41:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:41:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:41:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:41:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:41:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:41:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:41:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:41:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:41:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:41:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:41:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:41:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:41:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:41:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:41:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:41:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:41:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:41:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:41:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:41:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:41:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:41:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:41:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:41:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:41:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:41:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:41:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:41:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:41:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:41:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:41:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:41:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:41:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:41:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:41:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:41:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:41:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:41:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:41:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:41:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:41:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:41:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:41:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:41:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:41:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:41:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:41:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:41:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:41:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:41:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:41:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:41:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:41:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:41:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:41:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:41:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:41:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:41:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:41:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:41:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:41:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:41:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:41:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:41:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:41:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:41:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:41:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:41:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:41:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:41:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:41:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:41:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-28 14:41:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:41:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:41:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:41:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:41:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:41:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:41:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:41:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:41:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:41:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:41:04,168 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:41:04,556 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:41:04,558 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 14:41:04,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:41:04 BoogieIcfgContainer [2020-10-28 14:41:04,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:41:04,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:41:04,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:41:04,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:41:04,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:41:03" (1/3) ... [2020-10-28 14:41:04,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bad5ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:41:04, skipping insertion in model container [2020-10-28 14:41:04,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:03" (2/3) ... [2020-10-28 14:41:04,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bad5ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:41:04, skipping insertion in model container [2020-10-28 14:41:04,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:41:04" (3/3) ... [2020-10-28 14:41:04,586 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-2.i [2020-10-28 14:41:04,601 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:41:04,608 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:41:04,626 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:41:04,671 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:41:04,671 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:41:04,672 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:41:04,672 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:41:04,672 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:41:04,672 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:41:04,672 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:41:04,672 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:41:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-28 14:41:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:41:04,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:04,708 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] [2020-10-28 14:41:04,708 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:04,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1277453199, now seen corresponding path program 1 times [2020-10-28 14:41:04,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:04,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020781193] [2020-10-28 14:41:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:04,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:05,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:41:05,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:05,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-28 14:41:05,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:05,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:05,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:05,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:41:05,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:05,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:41:05,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:05,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:05,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:05,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:41:05,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:05,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:05,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:05,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:05,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:05,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:41:05,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:05,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:41:05,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:05,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:05,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:05,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020781193] [2020-10-28 14:41:05,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:05,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:41:05,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812167060] [2020-10-28 14:41:05,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:41:05,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:05,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:41:05,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:41:05,708 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-10-28 14:41:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:05,984 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2020-10-28 14:41:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:41:05,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 14:41:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:05,996 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:41:05,996 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:41:06,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:41:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:41:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-10-28 14:41:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:41:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-10-28 14:41:06,046 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 22 [2020-10-28 14:41:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:06,046 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-10-28 14:41:06,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:41:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-10-28 14:41:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:41:06,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:06,048 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] [2020-10-28 14:41:06,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:41:06,049 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:06,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1367740124, now seen corresponding path program 1 times [2020-10-28 14:41:06,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:06,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307457790] [2020-10-28 14:41:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:06,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:06,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:06,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:41:06,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:06,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 14:41:06,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:06,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:41:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:41:06,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:06,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:06,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:06,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:06,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:06,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:06,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:41:06,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:06,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:06,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:06,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:06,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:06,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:06,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:41:06,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:06,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:41:06,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:06,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:06,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:41:06,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:06,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:41:06,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307457790] [2020-10-28 14:41:06,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:06,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:41:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691883528] [2020-10-28 14:41:06,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:41:06,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:06,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:41:06,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:41:06,262 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 7 states. [2020-10-28 14:41:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:06,539 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-10-28 14:41:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:41:06,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 14:41:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:06,541 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:41:06,541 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:41:06,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:41:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:41:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-28 14:41:06,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:41:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-10-28 14:41:06,551 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 22 [2020-10-28 14:41:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:06,551 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-10-28 14:41:06,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:41:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-10-28 14:41:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:41:06,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:06,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:06,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:41:06,553 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1948091974, now seen corresponding path program 1 times [2020-10-28 14:41:06,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:06,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269946681] [2020-10-28 14:41:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:06,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:06,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:06,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:06,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:41:06,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:06,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-28 14:41:06,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:06,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:06,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:41:06,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:41:06,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:41:06,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:07,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:07,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:07,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:07,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:07,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:41:07,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:07,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:07,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:07,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:07,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:07,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:07,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:41:07,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:07,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 14:41:07,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:07,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:07,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:41:07,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:07,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:41:07,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:07,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269946681] [2020-10-28 14:41:07,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:07,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:41:07,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28185819] [2020-10-28 14:41:07,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:41:07,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:41:07,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:41:07,149 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 5 states. [2020-10-28 14:41:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:07,396 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2020-10-28 14:41:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:41:07,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-28 14:41:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:07,397 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:41:07,398 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:41:07,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:41:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:41:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-28 14:41:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:41:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-10-28 14:41:07,406 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 27 [2020-10-28 14:41:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:07,407 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-10-28 14:41:07,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:41:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-10-28 14:41:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:41:07,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:07,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:07,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:41:07,408 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash 927023620, now seen corresponding path program 1 times [2020-10-28 14:41:07,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:07,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520562431] [2020-10-28 14:41:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:10,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:10,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:41:10,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:41:10,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2806 [2020-10-28 14:41:10,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:10,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:10,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:41:10,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:10,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:41:10,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:10,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:10,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:10,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:10,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:10,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:41:10,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:10,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:10,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:10,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:10,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:10,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:10,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:10,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 14:41:10,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:10,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:41:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:10,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520562431] [2020-10-28 14:41:10,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:10,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 14:41:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378596760] [2020-10-28 14:41:10,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:41:10,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:10,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:41:10,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:41:10,474 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 11 states. [2020-10-28 14:41:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:11,083 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2020-10-28 14:41:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:41:11,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 14:41:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:11,085 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:41:11,086 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:41:11,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:41:11,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:41:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2020-10-28 14:41:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:41:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-28 14:41:11,103 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 27 [2020-10-28 14:41:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:11,103 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-28 14:41:11,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:41:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-28 14:41:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:41:11,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:11,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:11,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:41:11,106 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:11,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1592936314, now seen corresponding path program 1 times [2020-10-28 14:41:11,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:11,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33958892] [2020-10-28 14:41:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:11,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:11,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:11,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:11,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:11,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:14,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:14,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:41:14,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:41:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2938 [2020-10-28 14:41:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:14,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:41:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:41:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:14,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:14,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:14,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:14,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:14,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:14,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:14,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:14,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:14,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:14,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:14,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:14,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:14,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:14,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:14,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:41:14,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:14,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 14:41:14,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:14,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:14,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:41:14,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:14,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33958892] [2020-10-28 14:41:14,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:14,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 14:41:14,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158513542] [2020-10-28 14:41:14,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:41:14,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:41:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:41:14,270 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 11 states. [2020-10-28 14:41:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:14,970 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2020-10-28 14:41:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:41:14,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 14:41:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:14,972 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:41:14,972 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:41:14,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:41:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:41:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-10-28 14:41:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:41:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-28 14:41:14,984 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2020-10-28 14:41:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:14,985 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-28 14:41:14,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:41:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-28 14:41:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:41:14,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:14,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:14,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:41:14,987 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1591089272, now seen corresponding path program 1 times [2020-10-28 14:41:14,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:14,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334128535] [2020-10-28 14:41:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:15,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:16,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:16,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:41:16,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:16,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1827 [2020-10-28 14:41:16,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:16,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:41:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:41:16,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:16,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:16,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:16,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:16,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:16,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:16,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:16,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:16,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:16,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:16,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:16,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:16,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:16,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:41:16,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:16,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 14:41:16,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:16,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:16,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:16,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:16,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:41:16,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:17,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334128535] [2020-10-28 14:41:17,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:17,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 14:41:17,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028459689] [2020-10-28 14:41:17,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:41:17,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:17,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:41:17,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:41:17,081 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 10 states. [2020-10-28 14:41:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:17,954 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-10-28 14:41:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:41:17,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 14:41:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:17,957 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:41:17,957 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:41:17,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:41:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:41:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-10-28 14:41:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:41:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-28 14:41:17,974 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 27 [2020-10-28 14:41:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:17,974 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-28 14:41:17,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:41:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-28 14:41:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:41:17,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:17,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:17,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:41:17,977 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:17,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash -686593757, now seen corresponding path program 1 times [2020-10-28 14:41:17,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:17,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047420323] [2020-10-28 14:41:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:18,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:18,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:18,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:18,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:41:18,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:18,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-28 14:41:18,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:18,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:18,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:41:18,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:18,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:41:18,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:18,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:18,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:18,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:18,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:18,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:18,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:18,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:18,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:18,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:18,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:18,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:18,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:41:18,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:18,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 14:41:18,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:18,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:41:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:18,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047420323] [2020-10-28 14:41:18,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:18,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 14:41:18,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651487873] [2020-10-28 14:41:18,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:41:18,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:18,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:41:18,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:41:18,985 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 11 states. [2020-10-28 14:41:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:19,674 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-28 14:41:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:41:19,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-28 14:41:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:19,683 INFO L225 Difference]: With dead ends: 68 [2020-10-28 14:41:19,683 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:41:19,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:41:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:41:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-10-28 14:41:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:41:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-10-28 14:41:19,708 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 28 [2020-10-28 14:41:19,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:19,708 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-10-28 14:41:19,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:41:19,709 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-10-28 14:41:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:41:19,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:19,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:19,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:41:19,711 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:19,711 INFO L82 PathProgramCache]: Analyzing trace with hash -684746715, now seen corresponding path program 1 times [2020-10-28 14:41:19,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:19,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372507459] [2020-10-28 14:41:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:19,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:19,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:20,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:20,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:41:20,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:20,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-28 14:41:20,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:20,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:20,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:41:20,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:20,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:41:20,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:41:20,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:20,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:20,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:20,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:20,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:20,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:20,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:20,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:20,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:20,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:20,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:20,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:20,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:20,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:20,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:41:20,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:20,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 14:41:20,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:20,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:20,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:20,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:20,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:41:20,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:20,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372507459] [2020-10-28 14:41:20,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:20,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 14:41:20,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907987229] [2020-10-28 14:41:20,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:41:20,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:41:20,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:41:20,436 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 10 states. [2020-10-28 14:41:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:20,976 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-28 14:41:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:41:20,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 14:41:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:20,978 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:41:20,978 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:41:20,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:41:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:41:20,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-28 14:41:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:41:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-10-28 14:41:20,986 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 28 [2020-10-28 14:41:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:20,986 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-10-28 14:41:20,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:41:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-10-28 14:41:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:41:20,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:20,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:20,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:41:20,988 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:20,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:20,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1833366177, now seen corresponding path program 1 times [2020-10-28 14:41:20,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:20,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900114700] [2020-10-28 14:41:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:21,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:21,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:21,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:22,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:22,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:41:22,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-28 14:41:22,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:22,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:22,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:41:22,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:22,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:41:22,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:22,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:22,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:22,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:22,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:22,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:22,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:22,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:22,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:22,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:22,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:22,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:22,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:41:22,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:22,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 14:41:22,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:22,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:22,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:22,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:22,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:41:22,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:22,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900114700] [2020-10-28 14:41:22,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:22,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 14:41:22,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360894920] [2020-10-28 14:41:22,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:41:22,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:22,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:41:22,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:41:22,339 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 11 states. [2020-10-28 14:41:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:23,091 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-10-28 14:41:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:41:23,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-28 14:41:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:23,092 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:41:23,092 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:41:23,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:41:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:41:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-28 14:41:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:41:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-10-28 14:41:23,108 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 28 [2020-10-28 14:41:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:23,108 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-10-28 14:41:23,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:41:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-10-28 14:41:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:41:23,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:23,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:23,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:41:23,114 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1369817446, now seen corresponding path program 1 times [2020-10-28 14:41:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:23,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359915199] [2020-10-28 14:41:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:23,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:23,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:26,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:26,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:41:26,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:26,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3180 [2020-10-28 14:41:26,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:26,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:41:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:26,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:26,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:26,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:26,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:26,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:26,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:41:26,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:26,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:26,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:26,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:26,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:26,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:26,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:41:26,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:26,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-28 14:41:26,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:26,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:26,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:26,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:26,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:41:26,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:26,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359915199] [2020-10-28 14:41:26,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:26,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:41:26,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118886079] [2020-10-28 14:41:26,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:41:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:26,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:41:26,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:41:26,629 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 9 states. [2020-10-28 14:41:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:27,036 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2020-10-28 14:41:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:41:27,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-28 14:41:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:27,038 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:41:27,038 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:41:27,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:41:27,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:41:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-10-28 14:41:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:41:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-10-28 14:41:27,047 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 32 [2020-10-28 14:41:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:27,047 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-10-28 14:41:27,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:41:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-10-28 14:41:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:41:27,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:27,049 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:27,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:41:27,050 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:27,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:27,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1953730372, now seen corresponding path program 2 times [2020-10-28 14:41:27,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:27,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280072861] [2020-10-28 14:41:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:27,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:27,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:41:31,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:31,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4540 [2020-10-28 14:41:31,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:41:31,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:31,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:41:31,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:31,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:31,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:31,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:31,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:31,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:41:31,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:31,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-28 14:41:31,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:41:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:31,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:41:31,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:31,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280072861] [2020-10-28 14:41:31,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:31,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:41:31,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303316178] [2020-10-28 14:41:31,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:41:31,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:31,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:41:31,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:41:31,963 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 10 states. [2020-10-28 14:41:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:32,294 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2020-10-28 14:41:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:41:32,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-28 14:41:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:32,296 INFO L225 Difference]: With dead ends: 106 [2020-10-28 14:41:32,296 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:41:32,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:41:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:41:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-10-28 14:41:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 14:41:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-10-28 14:41:32,304 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 37 [2020-10-28 14:41:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:32,305 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-10-28 14:41:32,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:41:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-10-28 14:41:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:41:32,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:32,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:32,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:41:32,307 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:32,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1444002854, now seen corresponding path program 3 times [2020-10-28 14:41:32,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:32,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144702537] [2020-10-28 14:41:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:32,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:32,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:32,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:32,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:37,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:41:37,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:37,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 14:41:37,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:37,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:37,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:41:37,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:37,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:41:37,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:37,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:37,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:37,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:37,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:37,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:37,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:37,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:37,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:37,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:37,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:37,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:37,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:37,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:37,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:41:37,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:37,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 14:41:37,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:37,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:37,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:41:37,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:37,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:41:37,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144702537] [2020-10-28 14:41:37,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:37,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:41:37,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460974368] [2020-10-28 14:41:37,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:41:37,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:37,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:41:37,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:41:37,835 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 11 states. [2020-10-28 14:41:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:38,147 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2020-10-28 14:41:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:41:38,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-28 14:41:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:38,149 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:41:38,149 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:41:38,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:41:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:41:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2020-10-28 14:41:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 14:41:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-10-28 14:41:38,166 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 42 [2020-10-28 14:41:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:38,166 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-10-28 14:41:38,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:41:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-10-28 14:41:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:41:38,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:38,169 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:38,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:41:38,170 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1578519684, now seen corresponding path program 4 times [2020-10-28 14:41:38,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:38,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807634986] [2020-10-28 14:41:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:38,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:38,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:38,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:41,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:41,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:41:41,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:41,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2812 [2020-10-28 14:41:41,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:41,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:41,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:41:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:41:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:41:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:41,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:41,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:41,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:41,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:41,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:41,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:41,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:41,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:41,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:41,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:41,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:41,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:41:41,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:41,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 14:41:41,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:41,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:41:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:41,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:41:41,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:41:41,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807634986] [2020-10-28 14:41:41,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:41,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:41:41,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631973792] [2020-10-28 14:41:41,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:41:41,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:41:41,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:41:41,727 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 15 states. [2020-10-28 14:41:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:42,362 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2020-10-28 14:41:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:41:42,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-28 14:41:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:42,363 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:41:42,364 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:41:42,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:41:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:41:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-28 14:41:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:41:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-28 14:41:42,376 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 47 [2020-10-28 14:41:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:42,376 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-28 14:41:42,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:41:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-28 14:41:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:41:42,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:42,384 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:42,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:41:42,384 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash -941440250, now seen corresponding path program 1 times [2020-10-28 14:41:42,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:42,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9001902] [2020-10-28 14:41:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:42,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:43,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:43,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:41:43,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:43,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-28 14:41:43,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:43,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:41:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:41:43,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:41:43,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:43,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:43,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:43,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:43,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:43,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:41:43,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:43,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:43,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:43,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:43,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:43,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:43,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:41:43,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:43,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-28 14:41:43,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:43,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:41:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:41:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:41:43,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9001902] [2020-10-28 14:41:43,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:43,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:41:43,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405637642] [2020-10-28 14:41:43,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:41:43,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:41:43,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:41:43,994 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 15 states. [2020-10-28 14:41:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:44,870 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2020-10-28 14:41:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:41:44,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-28 14:41:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:44,871 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:41:44,871 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:41:44,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:41:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:41:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-10-28 14:41:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 14:41:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-10-28 14:41:44,880 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 47 [2020-10-28 14:41:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:44,882 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-10-28 14:41:44,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:41:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-10-28 14:41:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:41:44,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:44,884 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:44,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:41:44,885 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash -939593208, now seen corresponding path program 1 times [2020-10-28 14:41:44,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:44,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953306949] [2020-10-28 14:41:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:44,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:45,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:45,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:41:45,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:45,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-28 14:41:45,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:45,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:41:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:41:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:41:45,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:45,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:45,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:45,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:45,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:45,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:45,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:45,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:45,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:45,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:45,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:45,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:46,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:46,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:41:46,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:46,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-28 14:41:46,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:46,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:41:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:41:46,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:41:46,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953306949] [2020-10-28 14:41:46,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:46,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:41:46,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021155069] [2020-10-28 14:41:46,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:41:46,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:41:46,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:41:46,323 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 14 states. [2020-10-28 14:41:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:47,330 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-10-28 14:41:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:41:47,331 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-28 14:41:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:47,332 INFO L225 Difference]: With dead ends: 86 [2020-10-28 14:41:47,333 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:41:47,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:41:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:41:47,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-10-28 14:41:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:41:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-10-28 14:41:47,341 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 47 [2020-10-28 14:41:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:47,341 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-10-28 14:41:47,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:41:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-10-28 14:41:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:41:47,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:47,342 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:47,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:41:47,342 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1965052253, now seen corresponding path program 1 times [2020-10-28 14:41:47,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:47,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854940487] [2020-10-28 14:41:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:47,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:47,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:47,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:47,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:52,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:52,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:41:52,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:41:52,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:41:52,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:52,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:52,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:41:52,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:41:52,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:41:52,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:52,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:52,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:52,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:52,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:52,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:52,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:52,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:52,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:52,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:52,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:52,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:52,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:52,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:52,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:41:52,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:41:53,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854940487] [2020-10-28 14:41:53,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:53,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:41:53,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535071892] [2020-10-28 14:41:53,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:41:53,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:53,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:41:53,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:41:53,146 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 15 states. [2020-10-28 14:41:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:54,180 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2020-10-28 14:41:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:41:54,181 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-28 14:41:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:54,182 INFO L225 Difference]: With dead ends: 90 [2020-10-28 14:41:54,182 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:41:54,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:41:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-10-28 14:41:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:41:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-10-28 14:41:54,193 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 48 [2020-10-28 14:41:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:54,193 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-10-28 14:41:54,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:41:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-10-28 14:41:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:41:54,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:54,194 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:54,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:41:54,194 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1963205211, now seen corresponding path program 1 times [2020-10-28 14:41:54,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:54,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387103368] [2020-10-28 14:41:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:54,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:54,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:54,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:54,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:55,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:55,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:57,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:57,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:41:57,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:41:57,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3706 [2020-10-28 14:41:57,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:57,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:41:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:41:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:41:57,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:58,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:58,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:58,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:58,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:58,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:58,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:58,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:58,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:58,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:58,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:58,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:41:58,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:58,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-28 14:41:58,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:58,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:41:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:41:58,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:41:58,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387103368] [2020-10-28 14:41:58,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:58,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:41:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224914435] [2020-10-28 14:41:58,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:41:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:58,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:41:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:41:58,529 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 14 states. [2020-10-28 14:41:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:59,504 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-10-28 14:41:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:41:59,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-28 14:41:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:59,505 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:41:59,506 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:41:59,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:41:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:41:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-10-28 14:41:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:41:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-10-28 14:41:59,513 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 48 [2020-10-28 14:41:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:59,513 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-10-28 14:41:59,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:41:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-10-28 14:41:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:41:59,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:59,514 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:59,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:41:59,514 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash 554907681, now seen corresponding path program 1 times [2020-10-28 14:41:59,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:59,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223427517] [2020-10-28 14:41:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:59,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:59,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:59,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:59,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:04,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4730 [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:42:04,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:04,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:04,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:04,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:04,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:04,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:04,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:04,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:04,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:04,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:04,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:04,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:04,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:04,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:04,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:04,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:04,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-28 14:42:04,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:04,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:42:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:42:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223427517] [2020-10-28 14:42:05,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:05,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:42:05,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752435312] [2020-10-28 14:42:05,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:42:05,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:42:05,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:42:05,142 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 15 states. [2020-10-28 14:42:05,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:05,908 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-10-28 14:42:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:42:05,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-28 14:42:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:05,910 INFO L225 Difference]: With dead ends: 86 [2020-10-28 14:42:05,910 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 14:42:05,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:42:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 14:42:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-28 14:42:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:42:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-10-28 14:42:05,917 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 48 [2020-10-28 14:42:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:05,917 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-10-28 14:42:05,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:42:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-10-28 14:42:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:42:05,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:05,918 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-28 14:42:05,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:42:05,918 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1131254320, now seen corresponding path program 1 times [2020-10-28 14:42:05,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:05,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051203330] [2020-10-28 14:42:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:06,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:06,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:07,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:07,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4943 [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:42:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:11,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:11,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:11,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:11,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:11,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:11,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:11,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:11,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:11,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:11,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:11,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:11,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:11,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-28 14:42:11,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:11,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:42:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:11,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:42:12,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051203330] [2020-10-28 14:42:12,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:12,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:42:12,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829990570] [2020-10-28 14:42:12,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:42:12,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:42:12,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:42:12,065 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 15 states. [2020-10-28 14:42:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:13,176 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-28 14:42:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:42:13,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-28 14:42:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:13,178 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:42:13,178 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:42:13,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:42:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:42:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-28 14:42:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:42:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-28 14:42:13,185 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 53 [2020-10-28 14:42:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:13,185 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-28 14:42:13,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:42:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-28 14:42:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:42:13,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:13,186 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-28 14:42:13,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:42:13,186 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:13,187 INFO L82 PathProgramCache]: Analyzing trace with hash -288172201, now seen corresponding path program 1 times [2020-10-28 14:42:13,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:13,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419236032] [2020-10-28 14:42:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:13,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:15,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:42:15,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:42:15,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2464 [2020-10-28 14:42:15,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:15,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:42:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:42:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:42:15,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:15,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:15,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:15,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:15,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:15,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:15,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:15,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:15,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:15,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:15,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:15,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:15,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:15,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:16,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:16,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:16,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:16,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-28 14:42:16,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:16,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:16,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:42:16,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:16,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:16,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:42:16,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419236032] [2020-10-28 14:42:16,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:16,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:42:16,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831845884] [2020-10-28 14:42:16,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:42:16,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:42:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:42:16,951 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 20 states. [2020-10-28 14:42:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:18,785 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2020-10-28 14:42:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:42:18,786 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-28 14:42:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:18,787 INFO L225 Difference]: With dead ends: 86 [2020-10-28 14:42:18,787 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:42:18,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:42:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:42:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2020-10-28 14:42:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:42:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-28 14:42:18,796 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 53 [2020-10-28 14:42:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:18,797 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-28 14:42:18,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:42:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-28 14:42:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:42:18,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:18,797 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2020-10-28 14:42:18,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:42:18,798 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1486835161, now seen corresponding path program 1 times [2020-10-28 14:42:18,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:18,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299062792] [2020-10-28 14:42:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:19,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:21,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:21,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:42:21,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:21,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2308 [2020-10-28 14:42:21,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:21,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:42:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:42:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:42:21,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:21,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:21,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:21,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:21,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:21,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:21,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:21,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:21,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:21,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:21,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:21,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:21,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:21,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:22,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:22,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:22,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:22,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-28 14:42:22,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:22,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:42:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:22,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:42:22,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299062792] [2020-10-28 14:42:22,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:22,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:42:22,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20245662] [2020-10-28 14:42:22,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:42:22,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:22,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:42:22,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:42:22,666 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 20 states. [2020-10-28 14:42:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:24,323 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2020-10-28 14:42:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:42:24,324 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-28 14:42:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:24,325 INFO L225 Difference]: With dead ends: 86 [2020-10-28 14:42:24,325 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:42:24,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:42:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:42:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-28 14:42:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:42:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-10-28 14:42:24,336 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 53 [2020-10-28 14:42:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:24,337 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-10-28 14:42:24,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:42:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-10-28 14:42:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:42:24,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:24,340 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:24,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:42:24,341 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1488682203, now seen corresponding path program 1 times [2020-10-28 14:42:24,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:24,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404639972] [2020-10-28 14:42:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:24,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:25,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:25,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:42:25,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:25,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-28 14:42:25,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:25,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:25,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:42:25,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:42:25,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:42:25,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:25,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:25,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:25,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:25,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:25,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:25,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:25,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:25,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:25,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:26,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:26,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:26,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:26,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-28 14:42:26,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:26,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:42:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:42:26,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404639972] [2020-10-28 14:42:26,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:26,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:42:26,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556421429] [2020-10-28 14:42:26,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:42:26,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:26,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:42:26,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:42:26,859 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 19 states. [2020-10-28 14:42:28,595 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 14:42:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:28,954 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-10-28 14:42:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:42:28,954 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-28 14:42:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:28,955 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:42:28,955 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:42:28,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:42:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:42:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-28 14:42:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 14:42:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-10-28 14:42:28,962 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 53 [2020-10-28 14:42:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:28,963 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-10-28 14:42:28,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:42:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-10-28 14:42:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:42:28,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:28,964 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:28,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:42:28,964 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash 297041456, now seen corresponding path program 1 times [2020-10-28 14:42:28,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:28,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821258951] [2020-10-28 14:42:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:29,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:29,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:32,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:32,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:42:32,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:42:32,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3396 [2020-10-28 14:42:32,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:32,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:42:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:42:32,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:42:32,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:32,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:32,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:32,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:32,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:32,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:32,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:32,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:32,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:32,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:32,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:32,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:33,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:33,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:33,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:33,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-28 14:42:33,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:33,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:33,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:42:33,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:33,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:33,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:42:33,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821258951] [2020-10-28 14:42:33,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:33,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:42:33,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290382761] [2020-10-28 14:42:33,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:42:33,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:42:33,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:42:33,712 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 20 states. [2020-10-28 14:42:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:35,513 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2020-10-28 14:42:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:42:35,514 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-28 14:42:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:35,515 INFO L225 Difference]: With dead ends: 83 [2020-10-28 14:42:35,515 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 14:42:35,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:42:35,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 14:42:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-10-28 14:42:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 14:42:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-28 14:42:35,531 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 54 [2020-10-28 14:42:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:35,532 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-28 14:42:35,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:42:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-28 14:42:35,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:42:35,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:35,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:35,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:42:35,533 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:35,533 INFO L82 PathProgramCache]: Analyzing trace with hash 298888498, now seen corresponding path program 1 times [2020-10-28 14:42:35,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:35,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724556676] [2020-10-28 14:42:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:36,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:38,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2661 [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:42:38,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:38,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:38,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:38,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:38,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:38,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:38,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:38,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:38,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:38,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:38,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:38,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:38,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:38,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:38,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-28 14:42:38,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:38,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:38,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:42:38,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:38,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:38,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:42:39,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724556676] [2020-10-28 14:42:39,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:39,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:42:39,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787528901] [2020-10-28 14:42:39,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:42:39,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:39,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:42:39,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:42:39,535 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 19 states. [2020-10-28 14:42:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:41,211 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-10-28 14:42:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:42:41,212 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-28 14:42:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:41,213 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:42:41,213 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 14:42:41,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:42:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 14:42:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-28 14:42:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:42:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-10-28 14:42:41,220 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 54 [2020-10-28 14:42:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:41,221 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-10-28 14:42:41,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:42:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-10-28 14:42:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:42:41,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:41,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:41,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:42:41,222 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1477965906, now seen corresponding path program 1 times [2020-10-28 14:42:41,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:41,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273443182] [2020-10-28 14:42:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:41,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:41,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:44,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:46,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:42:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:46,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:46,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:46,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:46,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:46,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:46,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:46,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:46,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:46,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:46,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:46,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:46,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:46,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:46,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:47,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:47,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:47,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:47,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-28 14:42:47,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:47,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:47,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:42:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:47,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:42:47,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273443182] [2020-10-28 14:42:47,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:47,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:42:47,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847023168] [2020-10-28 14:42:47,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:42:47,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:47,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:42:47,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:42:47,667 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 20 states. [2020-10-28 14:42:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:49,375 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-10-28 14:42:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:42:49,376 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-28 14:42:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:49,377 INFO L225 Difference]: With dead ends: 82 [2020-10-28 14:42:49,377 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 14:42:49,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:42:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 14:42:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-28 14:42:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 14:42:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-28 14:42:49,384 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 54 [2020-10-28 14:42:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:49,385 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-28 14:42:49,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:42:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-28 14:42:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:42:49,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:49,386 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1] [2020-10-28 14:42:49,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:42:49,386 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2046669213, now seen corresponding path program 1 times [2020-10-28 14:42:49,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:49,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202803873] [2020-10-28 14:42:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:49,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:49,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:54,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:54,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:42:54,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:42:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 14:42:54,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:54,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:42:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:42:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:42:54,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:54,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:54,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:54,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:54,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:54,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:54,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:54,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:54,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:54,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:54,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:54,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:42:54,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:42:55,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202803873] [2020-10-28 14:42:55,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:55,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:42:55,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182384221] [2020-10-28 14:42:55,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:42:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:42:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:42:55,269 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 18 states. [2020-10-28 14:42:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:57,039 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2020-10-28 14:42:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:42:57,040 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-28 14:42:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:57,041 INFO L225 Difference]: With dead ends: 123 [2020-10-28 14:42:57,041 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 14:42:57,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:42:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 14:42:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2020-10-28 14:42:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 14:42:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2020-10-28 14:42:57,051 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 59 [2020-10-28 14:42:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:57,051 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2020-10-28 14:42:57,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:42:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2020-10-28 14:42:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:42:57,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:57,052 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:57,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:42:57,053 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2044822171, now seen corresponding path program 1 times [2020-10-28 14:42:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:57,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660794116] [2020-10-28 14:42:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:57,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:57,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:57,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:59,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:02,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:02,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:43:02,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:43:02,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 14:43:02,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:02,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:43:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:43:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:43:02,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:02,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:02,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:02,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:02,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:02,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:02,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:02,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:02,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:02,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:02,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:02,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:02,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:02,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:02,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:02,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:43:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:43:03,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660794116] [2020-10-28 14:43:03,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:03,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:43:03,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797871736] [2020-10-28 14:43:03,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:43:03,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:03,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:43:03,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:43:03,115 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand 17 states. [2020-10-28 14:43:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:04,819 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2020-10-28 14:43:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:43:04,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-28 14:43:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:04,821 INFO L225 Difference]: With dead ends: 118 [2020-10-28 14:43:04,821 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 14:43:04,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:43:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 14:43:04,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2020-10-28 14:43:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 14:43:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-10-28 14:43:04,831 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 59 [2020-10-28 14:43:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:04,832 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-10-28 14:43:04,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:43:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-10-28 14:43:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:43:04,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:04,833 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:04,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:43:04,833 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:04,834 INFO L82 PathProgramCache]: Analyzing trace with hash 473290721, now seen corresponding path program 1 times [2020-10-28 14:43:04,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:04,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325667260] [2020-10-28 14:43:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:04,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:05,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:05,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:05,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:06,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:07,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:09,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:09,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:43:09,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:43:09,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-28 14:43:09,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:09,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:43:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:43:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:43:09,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:10,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:10,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:10,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:10,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:10,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:10,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:43:10,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:10,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:10,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:10,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:10,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:10,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:10,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:10,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:43:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:43:10,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325667260] [2020-10-28 14:43:10,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:10,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:43:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691518074] [2020-10-28 14:43:10,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:43:10,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:10,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:43:10,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:43:10,891 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 18 states. [2020-10-28 14:43:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:12,629 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2020-10-28 14:43:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:43:12,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-28 14:43:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:12,631 INFO L225 Difference]: With dead ends: 122 [2020-10-28 14:43:12,631 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 14:43:12,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:43:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 14:43:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-10-28 14:43:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 14:43:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2020-10-28 14:43:12,654 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 59 [2020-10-28 14:43:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:12,654 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2020-10-28 14:43:12,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:43:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2020-10-28 14:43:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:43:12,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:12,655 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:12,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:43:12,655 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:12,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:12,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1203587094, now seen corresponding path program 2 times [2020-10-28 14:43:12,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:12,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949142438] [2020-10-28 14:43:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:12,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:13,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:17,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:17,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:43:17,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:43:17,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:43:17,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:17,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:17,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:43:17,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:17,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:43:17,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:17,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:17,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:17,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:17,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:17,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:17,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:17,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:17,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:17,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:17,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:17,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:17,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:17,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:17,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:18,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:18,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:43:18,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:18,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-10-28 14:43:18,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:18,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:18,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:43:18,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:18,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:43:18,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:19,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949142438] [2020-10-28 14:43:19,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:19,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:43:19,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304020463] [2020-10-28 14:43:19,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:43:19,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:43:19,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:43:19,806 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand 25 states. [2020-10-28 14:43:21,906 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-28 14:43:22,108 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-28 14:43:22,628 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-28 14:43:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:23,294 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2020-10-28 14:43:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:43:23,295 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-28 14:43:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:23,296 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:43:23,297 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 14:43:23,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:43:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 14:43:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2020-10-28 14:43:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 14:43:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-10-28 14:43:23,306 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 59 [2020-10-28 14:43:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:23,306 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-10-28 14:43:23,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:43:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-10-28 14:43:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:43:23,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:23,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2020-10-28 14:43:23,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:43:23,308 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:23,308 INFO L82 PathProgramCache]: Analyzing trace with hash 571420268, now seen corresponding path program 2 times [2020-10-28 14:43:23,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:23,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138114618] [2020-10-28 14:43:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:23,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:24,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:24,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:24,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:43:24,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:24,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-28 14:43:24,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:24,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:24,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:43:24,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:24,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:43:24,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:25,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:25,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:25,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:25,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:25,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:25,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:43:25,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:25,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:25,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:25,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:25,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:25,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:25,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:25,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:25,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:43:25,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:25,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-28 14:43:25,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:25,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:25,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:43:25,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:25,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:43:25,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:27,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138114618] [2020-10-28 14:43:27,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:27,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:43:27,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204263437] [2020-10-28 14:43:27,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:43:27,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:43:27,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:43:27,065 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 25 states. [2020-10-28 14:43:28,935 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-28 14:43:29,521 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-28 14:43:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:30,292 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2020-10-28 14:43:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:43:30,293 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-28 14:43:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:30,294 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:43:30,294 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 14:43:30,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:43:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 14:43:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2020-10-28 14:43:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 14:43:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2020-10-28 14:43:30,303 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 59 [2020-10-28 14:43:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:30,304 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2020-10-28 14:43:30,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:43:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2020-10-28 14:43:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:43:30,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:30,305 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:30,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:43:30,305 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash 573267310, now seen corresponding path program 2 times [2020-10-28 14:43:30,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:30,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509517088] [2020-10-28 14:43:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:30,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:31,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:31,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:43:31,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:31,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1376 [2020-10-28 14:43:31,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:31,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:31,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:43:31,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:31,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:43:31,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:31,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:31,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:31,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:31,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:31,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:31,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:43:31,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:31,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:31,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:31,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:31,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:31,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:31,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:31,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:32,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:32,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:43:32,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:32,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-28 14:43:32,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:32,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:43:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:43:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:33,229 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-28 14:43:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 29 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509517088] [2020-10-28 14:43:33,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:33,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:43:33,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675679070] [2020-10-28 14:43:33,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:43:33,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:43:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:43:33,783 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand 24 states. [2020-10-28 14:43:35,438 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-28 14:43:36,020 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2020-10-28 14:43:36,323 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-28 14:43:36,516 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-28 14:43:37,043 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-10-28 14:43:37,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:37,668 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-10-28 14:43:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:43:37,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-28 14:43:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:37,670 INFO L225 Difference]: With dead ends: 110 [2020-10-28 14:43:37,670 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 14:43:37,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:43:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 14:43:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2020-10-28 14:43:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 14:43:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2020-10-28 14:43:37,680 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 59 [2020-10-28 14:43:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:37,680 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2020-10-28 14:43:37,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:43:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2020-10-28 14:43:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:43:37,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:37,681 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2020-10-28 14:43:37,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:43:37,682 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1738824993, now seen corresponding path program 2 times [2020-10-28 14:43:37,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:37,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379811504] [2020-10-28 14:43:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:38,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:38,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:39,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:39,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:42,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:43:42,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:42,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:42,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:42,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:42,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:42,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:42,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:42,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:43:42,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:42,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 14:43:42,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:42,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:42,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:43:42,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:43:42,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:43:42,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 14:43:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379811504] [2020-10-28 14:43:42,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:42,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:43:42,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883522283] [2020-10-28 14:43:42,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:43:42,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:42,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:43:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:43:42,960 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand 6 states. [2020-10-28 14:43:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:43,276 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2020-10-28 14:43:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:43:43,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 14:43:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:43,278 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:43:43,279 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:43:43,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:43:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:43:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 14:43:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:43:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-10-28 14:43:43,287 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 59 [2020-10-28 14:43:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:43,288 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-10-28 14:43:43,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:43:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-10-28 14:43:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:43:43,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:43,289 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-28 14:43:43,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:43:43,289 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1983950845, now seen corresponding path program 2 times [2020-10-28 14:43:43,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:43,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789524751] [2020-10-28 14:43:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:45,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:47,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:47,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:43:47,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:43:47,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4013 [2020-10-28 14:43:47,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:47,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:43:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:43:47,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:47,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:47,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:47,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:47,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:47,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:47,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:47,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:47,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:47,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:47,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:47,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:47,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:47,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:48,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:48,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:43:48,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:48,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-28 14:43:48,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:48,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:43:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:43:48,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:49,456 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-28 14:43:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:49,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789524751] [2020-10-28 14:43:49,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:49,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:43:49,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101413547] [2020-10-28 14:43:49,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:43:49,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:49,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:43:49,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:43:49,680 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 25 states. [2020-10-28 14:43:51,227 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-28 14:43:51,719 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 14:43:51,975 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-28 14:43:52,132 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 14:43:52,498 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-28 14:43:52,799 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-28 14:43:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:53,382 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-10-28 14:43:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:43:53,383 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-28 14:43:53,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:53,384 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:43:53,385 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 14:43:53,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:43:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 14:43:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-10-28 14:43:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:43:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-10-28 14:43:53,394 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 60 [2020-10-28 14:43:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:53,394 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-10-28 14:43:53,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:43:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-10-28 14:43:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:43:53,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:53,395 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-28 14:43:53,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:43:53,396 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:53,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1985797887, now seen corresponding path program 2 times [2020-10-28 14:43:53,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:53,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129100204] [2020-10-28 14:43:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:54,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:56,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:56,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:43:56,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:56,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3315 [2020-10-28 14:43:56,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:56,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:43:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:43:56,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:56,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:56,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:56,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:56,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:56,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:43:56,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:56,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:56,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:56,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:56,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:56,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:56,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:57,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:57,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:57,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:43:57,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-28 14:43:57,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:57,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:43:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:43:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:58,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129100204] [2020-10-28 14:43:58,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:58,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:43:58,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568922464] [2020-10-28 14:43:58,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:43:58,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:43:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:43:58,754 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 24 states. [2020-10-28 14:44:00,535 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-10-28 14:44:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:01,591 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-28 14:44:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:44:01,592 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 60 [2020-10-28 14:44:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:01,593 INFO L225 Difference]: With dead ends: 94 [2020-10-28 14:44:01,593 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 14:44:01,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:44:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 14:44:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-10-28 14:44:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:44:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-28 14:44:01,600 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 60 [2020-10-28 14:44:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:01,601 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-28 14:44:01,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:44:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-28 14:44:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:44:01,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:01,602 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-28 14:44:01,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:44:01,602 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash 208943483, now seen corresponding path program 2 times [2020-10-28 14:44:01,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:01,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568556960] [2020-10-28 14:44:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:01,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:04,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:05,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:05,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:44:05,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:44:05,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3943 [2020-10-28 14:44:05,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:05,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:05,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:44:05,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:44:05,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:44:05,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:05,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:05,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:05,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:05,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:05,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:05,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:05,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:05,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:05,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:05,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:44:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:44:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:44:07,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568556960] [2020-10-28 14:44:07,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:07,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:44:07,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445714952] [2020-10-28 14:44:07,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:44:07,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:07,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:44:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:44:07,564 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 25 states. [2020-10-28 14:44:09,630 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-28 14:44:10,306 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-28 14:44:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:11,033 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2020-10-28 14:44:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:44:11,034 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-28 14:44:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:11,036 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:44:11,036 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:44:11,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:44:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:44:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-10-28 14:44:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:44:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-10-28 14:44:11,044 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 60 [2020-10-28 14:44:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:11,044 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-10-28 14:44:11,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:44:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-10-28 14:44:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 14:44:11,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:11,045 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:11,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:44:11,045 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash 14525968, now seen corresponding path program 3 times [2020-10-28 14:44:11,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:11,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786506132] [2020-10-28 14:44:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:11,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:11,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:15,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:16,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:44:16,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:44:16,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:44:16,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:16,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:16,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:44:16,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:44:16,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:44:16,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:16,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:16,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:16,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:16,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:16,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:16,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:16,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:16,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:16,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:44:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:16,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:16,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:44:16,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:16,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-28 14:44:16,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:16,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:44:16,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:16,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:44:16,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 14:44:17,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786506132] [2020-10-28 14:44:17,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:17,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:44:17,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834834236] [2020-10-28 14:44:17,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:44:17,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:44:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:44:17,414 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 18 states. [2020-10-28 14:44:19,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:19,518 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-10-28 14:44:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:44:19,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-10-28 14:44:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:19,521 INFO L225 Difference]: With dead ends: 96 [2020-10-28 14:44:19,521 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:44:19,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:44:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:44:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-28 14:44:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:44:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-10-28 14:44:19,527 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 64 [2020-10-28 14:44:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:19,527 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-10-28 14:44:19,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:44:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-10-28 14:44:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:44:19,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:19,528 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:19,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:44:19,529 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash 339621046, now seen corresponding path program 4 times [2020-10-28 14:44:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:19,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377585179] [2020-10-28 14:44:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:23,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:23,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:44:23,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:44:23,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4206 [2020-10-28 14:44:23,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:23,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:23,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:44:23,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:44:23,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:44:23,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:24,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:24,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:24,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:24,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:24,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:44:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:44:24,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:24,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-28 14:44:24,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:44:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:24,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:44:24,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:25,325 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-28 14:44:25,507 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-28 14:44:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:44:25,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377585179] [2020-10-28 14:44:25,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:25,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:44:25,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254538005] [2020-10-28 14:44:25,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:44:25,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:44:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:44:25,791 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 23 states. [2020-10-28 14:44:26,950 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-28 14:44:27,371 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-28 14:44:27,636 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2020-10-28 14:44:27,902 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-28 14:44:28,081 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-28 14:44:28,609 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 107 [2020-10-28 14:44:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:29,374 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-10-28 14:44:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:44:29,375 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-10-28 14:44:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:29,377 INFO L225 Difference]: With dead ends: 94 [2020-10-28 14:44:29,377 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:44:29,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:44:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:44:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-10-28 14:44:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:44:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-28 14:44:29,386 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 65 [2020-10-28 14:44:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:29,386 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-28 14:44:29,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:44:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-28 14:44:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:44:29,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:29,388 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:29,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:44:29,388 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash 341468088, now seen corresponding path program 2 times [2020-10-28 14:44:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:29,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768385609] [2020-10-28 14:44:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:29,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:32,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:32,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:44:32,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:32,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3412 [2020-10-28 14:44:32,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:32,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:44:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:44:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:44:32,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:33,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:33,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:33,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:33,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:33,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:33,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:33,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:33,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:33,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:33,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:33,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:33,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:44:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:33,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:33,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:33,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:44:33,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:33,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-28 14:44:33,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:33,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:33,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:44:33,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:33,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:44:33,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:34,306 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-28 14:44:34,494 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-28 14:44:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:44:34,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768385609] [2020-10-28 14:44:34,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:34,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:44:34,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574474564] [2020-10-28 14:44:34,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:44:34,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:34,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:44:34,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:44:34,758 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 22 states. [2020-10-28 14:44:36,198 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-28 14:44:36,447 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-28 14:44:37,182 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-28 14:44:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:37,819 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-28 14:44:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:44:37,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-28 14:44:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:37,821 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:44:37,821 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:44:37,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:44:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:44:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-28 14:44:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 14:44:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-28 14:44:37,830 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 65 [2020-10-28 14:44:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:37,830 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-28 14:44:37,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:44:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-28 14:44:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:44:37,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:37,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:37,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:44:37,831 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:37,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1435386316, now seen corresponding path program 2 times [2020-10-28 14:44:37,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:37,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511368904] [2020-10-28 14:44:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:37,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:38,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:42,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking...