/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=DEEPEST --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/heap-data/min_max.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:50:02,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:50:02,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:50:02,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:50:02,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:50:02,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:50:02,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:50:02,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:50:02,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:50:02,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:50:02,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:50:02,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:50:02,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:50:02,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:50:02,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:50:02,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:50:02,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:50:02,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:50:02,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:50:02,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:50:02,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:50:02,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:50:02,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:50:02,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:50:02,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:50:02,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:50:02,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:50:02,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:50:02,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:50:02,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:50:02,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:50:02,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:50:02,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:50:02,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:50:02,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:50:02,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:50:02,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:50:02,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:50:02,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:50:02,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:50:02,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:50:02,470 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 [2020-10-27 19:50:02,526 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:50:02,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:50:02,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:50:02,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:50:02,533 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:50:02,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:50:02,534 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:50:02,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:50:02,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:50:02,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:50:02,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:50:02,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:50:02,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:50:02,537 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:50:02,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:50:02,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:50:02,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:50:02,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:50:02,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:50:02,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:50:02,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:50:02,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:50:02,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:50:02,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:50:02,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:50:02,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:50:02,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:50:02,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:50:02,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:50:02,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:50:03,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:50:03,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:50:03,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:50:03,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:50:03,058 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:50:03,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/min_max.i [2020-10-27 19:50:03,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaa0c82e0/1dd6bbbd40c44b428d4d9230b35836bf/FLAG5825c12eb [2020-10-27 19:50:03,846 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:50:03,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/min_max.i [2020-10-27 19:50:03,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaa0c82e0/1dd6bbbd40c44b428d4d9230b35836bf/FLAG5825c12eb [2020-10-27 19:50:04,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaa0c82e0/1dd6bbbd40c44b428d4d9230b35836bf [2020-10-27 19:50:04,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:50:04,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:50:04,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:50:04,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:50:04,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:50:04,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bc903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04, skipping insertion in model container [2020-10-27 19:50:04,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:50:04,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:50:04,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:50:04,584 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:50:04,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:50:04,735 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:50:04,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04 WrapperNode [2020-10-27 19:50:04,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:50:04,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:50:04,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:50:04,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:50:04,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (1/1) ... [2020-10-27 19:50:04,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:50:04,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:50:04,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:50:04,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:50:04,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (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 [2020-10-27 19:50:04,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:50:04,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:50:04,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:50:04,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 19:50:04,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 19:50:04,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:50:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:50:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:50:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:50:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:50:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:50:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:50:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:50:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 19:50:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 19:50:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:50:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:50:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:50:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:50:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:50:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:50:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:50:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:50:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:50:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:50:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:50:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:50:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:50:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:50:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:50:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:50:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:50:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:50:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:50:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:50:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:50:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:50:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:50:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:50:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:50:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:50:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:50:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:50:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:50:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:50:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:50:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:50:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:50:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:50:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:50:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:50:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:50:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:50:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:50:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:50:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:50:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:50:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:50:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:50:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:50:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:50:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:50:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:50:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:50:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:50:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:50:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:50:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:50:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:50:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:50:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:50:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:50:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:50:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:50:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:50:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:50:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:50:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:50:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:50:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:50:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:50:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:50:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:50:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:50:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:50:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:50:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:50:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:50:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:50:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:50:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:50:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:50:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:50:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:50:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:50:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:50:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:50:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:50:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:50:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:50:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:50:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:50:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:50:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:50:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:50:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:50:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:50:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:50:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:50:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:50:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:50:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:50:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:50:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:50:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:50:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:50:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:50:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:50:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:50:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:50:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:50:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:50:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:50:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:50:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:50:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:50:04,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:50:05,369 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:50:05,370 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 19:50:05,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:50:05 BoogieIcfgContainer [2020-10-27 19:50:05,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:50:05,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:50:05,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:50:05,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:50:05,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:50:04" (1/3) ... [2020-10-27 19:50:05,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b950484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:50:05, skipping insertion in model container [2020-10-27 19:50:05,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:50:04" (2/3) ... [2020-10-27 19:50:05,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b950484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:50:05, skipping insertion in model container [2020-10-27 19:50:05,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:50:05" (3/3) ... [2020-10-27 19:50:05,382 INFO L111 eAbstractionObserver]: Analyzing ICFG min_max.i [2020-10-27 19:50:05,396 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:50:05,402 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:50:05,418 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:50:05,447 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:50:05,447 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:50:05,447 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:50:05,447 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:50:05,447 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:50:05,447 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:50:05,448 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:50:05,448 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:50:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-27 19:50:05,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:50:05,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:05,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:05,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:05,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:05,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1944775018, now seen corresponding path program 1 times [2020-10-27 19:50:05,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:05,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881956718] [2020-10-27 19:50:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:05,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:05,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:05,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:05,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:50:05,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:50:05,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-27 19:50:05,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:05,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:05,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:50:05,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:05,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 19:50:06,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:06,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:06,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:06,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:06,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:06,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:50:06,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:06,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:06,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881956718] [2020-10-27 19:50:06,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:50:06,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:50:06,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433720957] [2020-10-27 19:50:06,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:50:06,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:50:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:50:06,112 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-27 19:50:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:06,216 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2020-10-27 19:50:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:50:06,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 19:50:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:06,228 INFO L225 Difference]: With dead ends: 55 [2020-10-27 19:50:06,228 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 19:50:06,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:50:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 19:50:06,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2020-10-27 19:50:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 19:50:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-27 19:50:06,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2020-10-27 19:50:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:06,276 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-27 19:50:06,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:50:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-27 19:50:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 19:50:06,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:06,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:06,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:50:06,278 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash -281735583, now seen corresponding path program 1 times [2020-10-27 19:50:06,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:06,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120679800] [2020-10-27 19:50:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:06,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:06,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:06,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 19:50:06,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:06,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 19:50:06,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:50:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:50:06,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:06,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:06,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:06,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:06,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:06,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:06,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 19:50:06,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:06,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:06,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:06,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:06,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:50:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:06,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120679800] [2020-10-27 19:50:06,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:50:06,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:50:06,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496660679] [2020-10-27 19:50:06,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:50:06,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:50:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:50:06,605 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-10-27 19:50:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:06,843 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-27 19:50:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:50:06,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 19:50:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:06,844 INFO L225 Difference]: With dead ends: 36 [2020-10-27 19:50:06,845 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 19:50:06,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:50:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 19:50:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 19:50:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 19:50:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-27 19:50:06,860 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-10-27 19:50:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:06,861 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-27 19:50:06,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:50:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-27 19:50:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:50:06,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:06,863 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:06,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:50:06,867 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1011840127, now seen corresponding path program 1 times [2020-10-27 19:50:06,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:06,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705419301] [2020-10-27 19:50:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:06,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:07,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:07,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:50:07,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:07,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 19:50:07,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:07,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:50:07,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:07,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:50:07,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:07,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:07,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:07,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:07,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:07,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:07,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:50:07,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:07,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:07,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:07,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:07,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:07,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705419301] [2020-10-27 19:50:07,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:50:07,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:50:07,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498025009] [2020-10-27 19:50:07,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:50:07,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:07,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:50:07,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:50:07,290 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-10-27 19:50:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:07,480 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-27 19:50:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:50:07,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 19:50:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:07,482 INFO L225 Difference]: With dead ends: 46 [2020-10-27 19:50:07,482 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 19:50:07,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:50:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 19:50:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-27 19:50:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 19:50:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-27 19:50:07,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2020-10-27 19:50:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:07,491 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-27 19:50:07,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:50:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-27 19:50:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:50:07,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:07,492 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:07,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:50:07,493 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1712904705, now seen corresponding path program 1 times [2020-10-27 19:50:07,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:07,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596652515] [2020-10-27 19:50:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:07,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:07,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:07,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:50:07,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 19:50:07,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:50:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:50:07,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 19:50:07,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:07,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:07,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:07,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:07,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:07,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:50:07,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:07,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:07,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596652515] [2020-10-27 19:50:07,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:50:07,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:50:07,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480132269] [2020-10-27 19:50:07,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:50:07,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:07,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:50:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:50:07,745 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-10-27 19:50:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:07,938 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-27 19:50:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:50:07,938 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 19:50:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:07,940 INFO L225 Difference]: With dead ends: 48 [2020-10-27 19:50:07,940 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 19:50:07,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:50:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 19:50:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2020-10-27 19:50:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 19:50:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-27 19:50:07,947 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-10-27 19:50:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:07,948 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-27 19:50:07,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:50:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-27 19:50:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:50:07,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:07,949 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:07,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:50:07,950 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:07,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1786754843, now seen corresponding path program 1 times [2020-10-27 19:50:07,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:07,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830064312] [2020-10-27 19:50:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:07,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:08,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:08,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:50:08,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:08,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 19:50:08,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:08,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:50:08,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:08,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:50:08,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:08,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:08,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:08,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:08,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:08,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:08,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:50:08,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:08,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:08,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:08,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:08,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:08,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830064312] [2020-10-27 19:50:08,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:50:08,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:50:08,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150762769] [2020-10-27 19:50:08,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:50:08,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:08,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:50:08,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:50:08,165 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2020-10-27 19:50:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:08,361 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-27 19:50:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:50:08,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 19:50:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:08,362 INFO L225 Difference]: With dead ends: 45 [2020-10-27 19:50:08,362 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 19:50:08,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:50:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 19:50:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-27 19:50:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 19:50:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-27 19:50:08,371 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 21 [2020-10-27 19:50:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:08,371 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-27 19:50:08,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:50:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-27 19:50:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:50:08,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:08,373 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:08,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:50:08,373 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:08,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1807147875, now seen corresponding path program 1 times [2020-10-27 19:50:08,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:08,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325544374] [2020-10-27 19:50:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:08,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:08,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:08,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:50:08,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:08,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 19:50:08,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:08,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:50:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:50:08,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:08,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:08,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:08,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:08,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:50:08,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:08,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:08,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325544374] [2020-10-27 19:50:08,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:50:08,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:50:08,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163596888] [2020-10-27 19:50:08,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:50:08,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:08,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:50:08,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:50:08,614 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2020-10-27 19:50:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:08,822 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-27 19:50:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:50:08,824 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 19:50:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:08,825 INFO L225 Difference]: With dead ends: 40 [2020-10-27 19:50:08,825 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 19:50:08,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:50:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 19:50:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-27 19:50:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 19:50:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 19:50:08,836 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-27 19:50:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:08,836 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 19:50:08,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:50:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 19:50:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 19:50:08,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:08,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:08,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:50:08,837 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash -249146754, now seen corresponding path program 1 times [2020-10-27 19:50:08,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:08,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569121163] [2020-10-27 19:50:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:08,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:09,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:09,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 19:50:09,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:09,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 19:50:09,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:50:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:50:09,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:09,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:09,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:09,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:09,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:09,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:09,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:50:09,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:09,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:09,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:09,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:09,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569121163] [2020-10-27 19:50:09,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:09,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:50:09,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91221786] [2020-10-27 19:50:09,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:50:09,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:50:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:50:09,165 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-10-27 19:50:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:09,303 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-27 19:50:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:50:09,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 19:50:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:09,304 INFO L225 Difference]: With dead ends: 50 [2020-10-27 19:50:09,304 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 19:50:09,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:50:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 19:50:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 19:50:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 19:50:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-27 19:50:09,312 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2020-10-27 19:50:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:09,312 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-27 19:50:09,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:50:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-27 19:50:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:50:09,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:09,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:09,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:50:09,314 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1211749604, now seen corresponding path program 2 times [2020-10-27 19:50:09,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:09,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115268988] [2020-10-27 19:50:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:09,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:09,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:10,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:10,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:50:10,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:50:10,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-27 19:50:10,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:50:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:50:10,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:50:10,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:10,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:10,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:10,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:10,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:10,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:10,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:50:10,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:10,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:10,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:10,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:50:10,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115268988] [2020-10-27 19:50:10,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:10,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:50:10,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052183650] [2020-10-27 19:50:10,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:50:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:50:10,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:50:10,243 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2020-10-27 19:50:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:10,570 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2020-10-27 19:50:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:50:10,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 19:50:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:10,573 INFO L225 Difference]: With dead ends: 122 [2020-10-27 19:50:10,574 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 19:50:10,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:50:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 19:50:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 46. [2020-10-27 19:50:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 19:50:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-27 19:50:10,595 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2020-10-27 19:50:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:10,597 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-27 19:50:10,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:50:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-27 19:50:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:50:10,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:10,602 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:10,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:50:10,602 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:10,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2072100442, now seen corresponding path program 1 times [2020-10-27 19:50:10,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:10,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746693126] [2020-10-27 19:50:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:10,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:10,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:11,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:11,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:13,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:13,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:50:13,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:50:13,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2749 [2020-10-27 19:50:13,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:13,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:50:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:50:13,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:50:13,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:13,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:13,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:13,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:13,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:13,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:50:13,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:13,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:13,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:13,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:13,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:13,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746693126] [2020-10-27 19:50:13,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:13,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:50:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155946345] [2020-10-27 19:50:13,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:50:13,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:50:13,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:50:13,659 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 13 states. [2020-10-27 19:50:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:14,349 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2020-10-27 19:50:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:50:14,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-27 19:50:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:14,351 INFO L225 Difference]: With dead ends: 101 [2020-10-27 19:50:14,351 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 19:50:14,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:50:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 19:50:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-27 19:50:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 19:50:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-10-27 19:50:14,369 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 29 [2020-10-27 19:50:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:14,371 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-10-27 19:50:14,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:50:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-10-27 19:50:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:50:14,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:14,374 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:14,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:50:14,374 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2062149338, now seen corresponding path program 1 times [2020-10-27 19:50:14,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:14,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748227005] [2020-10-27 19:50:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:14,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:14,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:14,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:50:14,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:14,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-27 19:50:14,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:14,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:50:14,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:14,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:50:14,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:14,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:14,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:14,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:14,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:14,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:50:14,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:14,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748227005] [2020-10-27 19:50:14,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:14,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:50:14,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660584436] [2020-10-27 19:50:14,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:50:14,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:14,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:50:14,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:50:14,692 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 9 states. [2020-10-27 19:50:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:15,098 INFO L93 Difference]: Finished difference Result 139 states and 170 transitions. [2020-10-27 19:50:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:50:15,099 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 19:50:15,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:15,100 INFO L225 Difference]: With dead ends: 139 [2020-10-27 19:50:15,100 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 19:50:15,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:50:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 19:50:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 85. [2020-10-27 19:50:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 19:50:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2020-10-27 19:50:15,131 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 29 [2020-10-27 19:50:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:15,131 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2020-10-27 19:50:15,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:50:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2020-10-27 19:50:15,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:50:15,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:15,134 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:15,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:50:15,135 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1394273950, now seen corresponding path program 2 times [2020-10-27 19:50:15,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:15,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438083231] [2020-10-27 19:50:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:15,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:16,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:16,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:50:16,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:50:16,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-27 19:50:16,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:50:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:50:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:50:16,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:16,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:16,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:16,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:16,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:16,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:16,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:50:16,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:16,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:50:16,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438083231] [2020-10-27 19:50:16,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:16,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:50:16,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966690367] [2020-10-27 19:50:16,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:50:16,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:16,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:50:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:50:16,138 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand 9 states. [2020-10-27 19:50:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:16,407 INFO L93 Difference]: Finished difference Result 222 states and 282 transitions. [2020-10-27 19:50:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:50:16,407 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 19:50:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:16,409 INFO L225 Difference]: With dead ends: 222 [2020-10-27 19:50:16,409 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 19:50:16,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:50:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 19:50:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 83. [2020-10-27 19:50:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 19:50:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2020-10-27 19:50:16,438 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 29 [2020-10-27 19:50:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:16,440 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2020-10-27 19:50:16,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:50:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2020-10-27 19:50:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:50:16,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:16,445 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:16,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:50:16,445 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:16,446 INFO L82 PathProgramCache]: Analyzing trace with hash 383156700, now seen corresponding path program 1 times [2020-10-27 19:50:16,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:16,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677035932] [2020-10-27 19:50:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:16,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:16,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:50:16,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:16,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 19:50:16,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:50:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:50:16,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:16,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:16,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:16,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:16,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:16,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:50:16,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:16,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677035932] [2020-10-27 19:50:16,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:16,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:50:16,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455447331] [2020-10-27 19:50:16,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:50:16,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:50:16,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:50:16,878 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand 10 states. [2020-10-27 19:50:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:17,314 INFO L93 Difference]: Finished difference Result 156 states and 197 transitions. [2020-10-27 19:50:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:50:17,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 19:50:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:17,316 INFO L225 Difference]: With dead ends: 156 [2020-10-27 19:50:17,316 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 19:50:17,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:50:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 19:50:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-10-27 19:50:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 19:50:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 120 transitions. [2020-10-27 19:50:17,341 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 120 transitions. Word has length 29 [2020-10-27 19:50:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:17,342 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 120 transitions. [2020-10-27 19:50:17,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:50:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 120 transitions. [2020-10-27 19:50:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:50:17,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:17,343 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:17,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:50:17,343 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:17,344 INFO L82 PathProgramCache]: Analyzing trace with hash -789047778, now seen corresponding path program 2 times [2020-10-27 19:50:17,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:17,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206863699] [2020-10-27 19:50:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:17,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:17,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:17,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:18,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:18,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:50:18,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:50:18,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-27 19:50:18,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:50:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:50:18,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:18,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:18,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:18,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:18,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:18,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:18,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:50:18,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:18,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:18,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:18,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:18,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:18,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206863699] [2020-10-27 19:50:18,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:18,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:50:18,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477204327] [2020-10-27 19:50:18,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:50:18,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:18,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:50:18,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:50:18,949 INFO L87 Difference]: Start difference. First operand 90 states and 120 transitions. Second operand 10 states. [2020-10-27 19:50:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:19,405 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2020-10-27 19:50:19,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:50:19,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 19:50:19,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:19,407 INFO L225 Difference]: With dead ends: 141 [2020-10-27 19:50:19,407 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 19:50:19,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:50:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 19:50:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 72. [2020-10-27 19:50:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:50:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-10-27 19:50:19,420 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 29 [2020-10-27 19:50:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:19,420 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-10-27 19:50:19,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:50:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-10-27 19:50:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:50:19,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:19,421 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:19,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:50:19,422 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:19,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:19,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1810116132, now seen corresponding path program 1 times [2020-10-27 19:50:19,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:19,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777378189] [2020-10-27 19:50:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:19,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:19,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:20,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:20,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:50:20,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:50:20,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-27 19:50:20,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:50:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:50:20,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:20,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:20,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:20,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:20,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:20,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:50:20,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:20,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:20,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:20,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:20,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:20,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777378189] [2020-10-27 19:50:20,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:20,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:50:20,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534368774] [2020-10-27 19:50:20,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:50:20,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:20,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:50:20,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:50:20,250 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 9 states. [2020-10-27 19:50:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:20,644 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2020-10-27 19:50:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:50:20,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 19:50:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:20,646 INFO L225 Difference]: With dead ends: 113 [2020-10-27 19:50:20,646 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 19:50:20,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:50:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 19:50:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 49. [2020-10-27 19:50:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 19:50:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-27 19:50:20,656 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2020-10-27 19:50:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:20,656 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-27 19:50:20,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:50:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-27 19:50:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:50:20,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:20,657 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:20,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:50:20,657 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1505298890, now seen corresponding path program 1 times [2020-10-27 19:50:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:20,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152418325] [2020-10-27 19:50:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:20,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:20,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:20,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:50:20,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 19:50:20,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:50:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:50:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:20,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:20,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:20,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:20,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:20,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:20,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:50:20,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:20,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:20,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:20,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:20,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:20,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152418325] [2020-10-27 19:50:20,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:20,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:50:20,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363065989] [2020-10-27 19:50:20,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:50:20,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:50:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:50:20,954 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 9 states. [2020-10-27 19:50:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:21,335 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2020-10-27 19:50:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:50:21,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 19:50:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:21,337 INFO L225 Difference]: With dead ends: 108 [2020-10-27 19:50:21,337 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 19:50:21,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:50:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 19:50:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-27 19:50:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:50:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-10-27 19:50:21,354 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 31 [2020-10-27 19:50:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:21,354 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-10-27 19:50:21,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:50:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-10-27 19:50:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:50:21,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:21,356 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:21,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:50:21,356 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1816592054, now seen corresponding path program 1 times [2020-10-27 19:50:21,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:21,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709776594] [2020-10-27 19:50:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:21,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:21,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:21,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:21,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:21,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:23,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:23,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:50:23,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:50:23,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2034 [2020-10-27 19:50:23,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:23,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:50:23,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:23,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:50:23,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:23,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:23,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:23,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:23,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:23,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:23,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 19:50:23,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:23,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:23,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:23,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709776594] [2020-10-27 19:50:23,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:23,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:50:23,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974493075] [2020-10-27 19:50:23,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:50:23,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:23,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:50:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:50:23,624 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 11 states. [2020-10-27 19:50:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:24,152 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2020-10-27 19:50:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:50:24,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 19:50:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:24,153 INFO L225 Difference]: With dead ends: 129 [2020-10-27 19:50:24,153 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 19:50:24,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:50:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 19:50:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-27 19:50:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 19:50:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-10-27 19:50:24,169 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 31 [2020-10-27 19:50:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:24,169 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-10-27 19:50:24,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:50:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-10-27 19:50:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:50:24,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:24,170 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:24,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:50:24,171 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:24,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1082597064, now seen corresponding path program 1 times [2020-10-27 19:50:24,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:24,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428582110] [2020-10-27 19:50:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:24,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:24,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:24,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:50:24,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:24,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 19:50:24,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:24,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:50:24,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:24,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:50:24,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:24,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:24,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:24,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:24,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:24,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:50:24,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:24,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:24,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:24,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:24,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428582110] [2020-10-27 19:50:24,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:24,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:50:24,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905970345] [2020-10-27 19:50:24,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:50:24,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:24,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:50:24,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:50:24,553 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 10 states. [2020-10-27 19:50:25,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:25,163 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2020-10-27 19:50:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:50:25,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 19:50:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:25,164 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:50:25,165 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 19:50:25,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:50:25,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 19:50:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 79. [2020-10-27 19:50:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:50:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-10-27 19:50:25,179 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 31 [2020-10-27 19:50:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:25,179 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-10-27 19:50:25,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:50:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-10-27 19:50:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:50:25,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:25,180 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:25,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:50:25,181 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2055673416, now seen corresponding path program 1 times [2020-10-27 19:50:25,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:25,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747727368] [2020-10-27 19:50:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:25,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:25,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:27,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:27,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:50:27,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:50:27,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2323 [2020-10-27 19:50:27,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:50:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:50:27,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:27,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:27,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:27,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:27,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:27,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:27,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:50:27,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:27,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:27,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:27,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747727368] [2020-10-27 19:50:27,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:27,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:50:27,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166935663] [2020-10-27 19:50:27,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:50:27,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:27,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:50:27,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:50:27,739 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 11 states. [2020-10-27 19:50:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:28,218 INFO L93 Difference]: Finished difference Result 164 states and 196 transitions. [2020-10-27 19:50:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:50:28,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 19:50:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:28,220 INFO L225 Difference]: With dead ends: 164 [2020-10-27 19:50:28,221 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 19:50:28,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:50:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 19:50:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 77. [2020-10-27 19:50:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 19:50:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-10-27 19:50:28,234 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 31 [2020-10-27 19:50:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:28,235 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-10-27 19:50:28,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:50:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-10-27 19:50:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:50:28,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:28,237 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:28,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:50:28,238 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:28,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1866967044, now seen corresponding path program 2 times [2020-10-27 19:50:28,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:28,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460771739] [2020-10-27 19:50:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:28,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:28,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:28,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:28,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:29,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:29,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:50:29,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:50:29,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-27 19:50:29,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:50:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:50:29,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:29,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:29,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:29,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:29,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:29,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:29,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:50:29,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:29,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:29,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:29,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:29,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:50:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:29,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460771739] [2020-10-27 19:50:29,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:29,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:50:29,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434287827] [2020-10-27 19:50:29,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:50:29,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:29,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:50:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:50:29,496 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 12 states. [2020-10-27 19:50:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:30,087 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2020-10-27 19:50:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:50:30,088 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 19:50:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:30,090 INFO L225 Difference]: With dead ends: 103 [2020-10-27 19:50:30,090 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 19:50:30,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:50:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 19:50:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 51. [2020-10-27 19:50:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 19:50:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-27 19:50:30,102 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 31 [2020-10-27 19:50:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:30,103 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-27 19:50:30,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:50:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-27 19:50:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:50:30,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:30,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:30,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:50:30,104 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1756297603, now seen corresponding path program 3 times [2020-10-27 19:50:30,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:30,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061691289] [2020-10-27 19:50:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:30,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:30,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:30,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:50:30,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 19:50:30,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:50:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:50:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:30,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:30,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:30,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:30,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:30,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:30,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:30,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061691289] [2020-10-27 19:50:30,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:30,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:50:30,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064063352] [2020-10-27 19:50:30,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:50:30,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:30,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:50:30,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:50:30,403 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 9 states. [2020-10-27 19:50:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:30,635 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-27 19:50:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:50:30,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 19:50:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:30,637 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:50:30,637 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 19:50:30,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:50:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 19:50:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-27 19:50:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 19:50:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-10-27 19:50:30,652 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 34 [2020-10-27 19:50:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:30,652 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-10-27 19:50:30,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:50:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-10-27 19:50:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:50:30,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:30,653 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:30,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:50:30,653 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:30,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2004204961, now seen corresponding path program 4 times [2020-10-27 19:50:30,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:30,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567989305] [2020-10-27 19:50:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:30,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:30,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:30,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:31,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:32,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:33,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:33,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:34,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:35,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:35,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:35,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:50:35,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 19:50:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 19:50:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:50:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:50:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:36,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:36,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:36,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:36,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:36,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:50:36,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:36,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:36,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:36,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:36,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:36,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567989305] [2020-10-27 19:50:36,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:36,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:50:36,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505914826] [2020-10-27 19:50:36,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:50:36,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:36,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:50:36,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:50:36,116 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 15 states. [2020-10-27 19:50:38,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:38,448 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2020-10-27 19:50:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:50:38,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 19:50:38,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:38,450 INFO L225 Difference]: With dead ends: 210 [2020-10-27 19:50:38,450 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 19:50:38,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:50:38,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 19:50:38,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-27 19:50:38,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 19:50:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-10-27 19:50:38,472 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 39 [2020-10-27 19:50:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:38,472 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-10-27 19:50:38,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:50:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-10-27 19:50:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:50:38,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:38,473 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:38,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:50:38,474 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:38,474 INFO L82 PathProgramCache]: Analyzing trace with hash -119208099, now seen corresponding path program 3 times [2020-10-27 19:50:38,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:38,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064582549] [2020-10-27 19:50:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:38,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:39,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:39,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:43,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:43,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:50:43,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:50:43,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4615 [2020-10-27 19:50:43,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:43,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:50:43,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 19:50:43,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:50:43,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:43,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:43,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:43,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:43,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:43,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:43,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:43,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:43,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:50:43,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064582549] [2020-10-27 19:50:43,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:43,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:50:43,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061412579] [2020-10-27 19:50:43,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:50:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:50:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:50:43,330 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand 12 states. [2020-10-27 19:50:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:44,150 INFO L93 Difference]: Finished difference Result 228 states and 276 transitions. [2020-10-27 19:50:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:50:44,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 19:50:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:44,155 INFO L225 Difference]: With dead ends: 228 [2020-10-27 19:50:44,155 INFO L226 Difference]: Without dead ends: 208 [2020-10-27 19:50:44,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:50:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-27 19:50:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 136. [2020-10-27 19:50:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 19:50:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-10-27 19:50:44,195 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 39 [2020-10-27 19:50:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:44,195 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-10-27 19:50:44,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:50:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-10-27 19:50:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:50:44,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:44,198 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:44,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:50:44,198 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1808151841, now seen corresponding path program 1 times [2020-10-27 19:50:44,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:44,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736282085] [2020-10-27 19:50:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:44,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:44,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:44,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:50:44,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:44,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 19:50:44,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:44,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:50:44,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:44,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:50:44,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:44,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:44,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:44,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:44,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:44,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:44,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:50:44,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:44,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:44,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:44,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:44,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736282085] [2020-10-27 19:50:44,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:44,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:50:44,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261475880] [2020-10-27 19:50:44,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:50:44,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:50:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:50:44,873 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand 12 states. [2020-10-27 19:50:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:45,857 INFO L93 Difference]: Finished difference Result 316 states and 399 transitions. [2020-10-27 19:50:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:50:45,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 19:50:45,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:45,860 INFO L225 Difference]: With dead ends: 316 [2020-10-27 19:50:45,860 INFO L226 Difference]: Without dead ends: 312 [2020-10-27 19:50:45,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:50:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-27 19:50:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 174. [2020-10-27 19:50:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 19:50:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 233 transitions. [2020-10-27 19:50:45,888 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 233 transitions. Word has length 39 [2020-10-27 19:50:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:45,888 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 233 transitions. [2020-10-27 19:50:45,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:50:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 233 transitions. [2020-10-27 19:50:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:50:45,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:45,889 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:45,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:50:45,889 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:45,890 INFO L82 PathProgramCache]: Analyzing trace with hash -618001567, now seen corresponding path program 2 times [2020-10-27 19:50:45,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:45,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519727639] [2020-10-27 19:50:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:45,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:45,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:46,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:46,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:46,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:46,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:50,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:50,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:50:50,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:50:50,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 19:50:50,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:50,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:50:50,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:50,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:50:50,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:51,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:51,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:51,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:51,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519727639] [2020-10-27 19:50:51,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:51,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:50:51,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535878216] [2020-10-27 19:50:51,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:50:51,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:51,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:50:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:50:51,278 INFO L87 Difference]: Start difference. First operand 174 states and 233 transitions. Second operand 14 states. [2020-10-27 19:50:52,235 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 19:50:52,745 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-27 19:50:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:53,385 INFO L93 Difference]: Finished difference Result 352 states and 437 transitions. [2020-10-27 19:50:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:50:53,387 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 19:50:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:53,389 INFO L225 Difference]: With dead ends: 352 [2020-10-27 19:50:53,389 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 19:50:53,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:50:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 19:50:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 167. [2020-10-27 19:50:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 19:50:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 224 transitions. [2020-10-27 19:50:53,421 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 224 transitions. Word has length 39 [2020-10-27 19:50:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:53,422 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 224 transitions. [2020-10-27 19:50:53,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:50:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 224 transitions. [2020-10-27 19:50:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:50:53,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:53,423 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:53,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:50:53,423 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1168591581, now seen corresponding path program 2 times [2020-10-27 19:50:53,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:53,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550238947] [2020-10-27 19:50:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:53,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:53,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:53,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:54,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:54,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:54,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:58,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:58,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:50:58,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:50:58,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4842 [2020-10-27 19:50:58,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:50:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:50:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:50:58,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:58,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:58,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:58,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:58,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:58,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:58,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:58,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:58,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:58,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:58,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:58,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 19:50:58,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550238947] [2020-10-27 19:50:58,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:58,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:50:58,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137090496] [2020-10-27 19:50:58,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:50:58,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:58,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:50:58,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:50:58,365 INFO L87 Difference]: Start difference. First operand 167 states and 224 transitions. Second operand 9 states. [2020-10-27 19:50:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:58,707 INFO L93 Difference]: Finished difference Result 383 states and 500 transitions. [2020-10-27 19:50:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:50:58,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-27 19:50:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:58,710 INFO L225 Difference]: With dead ends: 383 [2020-10-27 19:50:58,711 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 19:50:58,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:50:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 19:50:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 147. [2020-10-27 19:50:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 19:50:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2020-10-27 19:50:58,776 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 39 [2020-10-27 19:50:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:58,776 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2020-10-27 19:50:58,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:50:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2020-10-27 19:50:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:50:58,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:58,778 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:58,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:50:58,778 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:58,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1106551967, now seen corresponding path program 3 times [2020-10-27 19:50:58,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:58,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557296327] [2020-10-27 19:50:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:58,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:58,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:59,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:01,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:01,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:51:01,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:51:01,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3126 [2020-10-27 19:51:01,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:01,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:51:01,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:01,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:51:01,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:02,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:02,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:02,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:02,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:02,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:02,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:02,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:02,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:02,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:02,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:02,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557296327] [2020-10-27 19:51:02,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:02,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:51:02,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715340831] [2020-10-27 19:51:02,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:51:02,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:02,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:51:02,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:02,164 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand 12 states. [2020-10-27 19:51:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:03,260 INFO L93 Difference]: Finished difference Result 278 states and 345 transitions. [2020-10-27 19:51:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:51:03,260 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 19:51:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:03,262 INFO L225 Difference]: With dead ends: 278 [2020-10-27 19:51:03,262 INFO L226 Difference]: Without dead ends: 274 [2020-10-27 19:51:03,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:51:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-27 19:51:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 167. [2020-10-27 19:51:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 19:51:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 224 transitions. [2020-10-27 19:51:03,297 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 224 transitions. Word has length 39 [2020-10-27 19:51:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:03,297 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 224 transitions. [2020-10-27 19:51:03,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:51:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 224 transitions. [2020-10-27 19:51:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:51:03,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:03,298 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:03,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:51:03,299 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1005093601, now seen corresponding path program 2 times [2020-10-27 19:51:03,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:03,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501220496] [2020-10-27 19:51:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:03,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:03,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:03,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:03,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2868 [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:51:06,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:06,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:06,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:06,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:06,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:06,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:06,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:06,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:06,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501220496] [2020-10-27 19:51:06,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:06,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:51:06,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657382832] [2020-10-27 19:51:06,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:51:06,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:06,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:51:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:51:06,366 INFO L87 Difference]: Start difference. First operand 167 states and 224 transitions. Second operand 11 states. [2020-10-27 19:51:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:07,450 INFO L93 Difference]: Finished difference Result 285 states and 364 transitions. [2020-10-27 19:51:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:51:07,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-27 19:51:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:07,452 INFO L225 Difference]: With dead ends: 285 [2020-10-27 19:51:07,452 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 19:51:07,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:51:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 19:51:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 135. [2020-10-27 19:51:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 19:51:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 173 transitions. [2020-10-27 19:51:07,484 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 173 transitions. Word has length 39 [2020-10-27 19:51:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:07,484 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 173 transitions. [2020-10-27 19:51:07,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:51:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 173 transitions. [2020-10-27 19:51:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:51:07,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:07,485 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:07,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:51:07,486 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash 217611813, now seen corresponding path program 4 times [2020-10-27 19:51:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:07,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003567945] [2020-10-27 19:51:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:07,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:08,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:08,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:08,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:12,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:12,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:51:12,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:51:12,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4539 [2020-10-27 19:51:12,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:51:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:51:12,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:12,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:12,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:12,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:12,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:12,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:12,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:12,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:12,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:12,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:12,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:12,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:12,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003567945] [2020-10-27 19:51:12,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:12,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:51:12,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965823697] [2020-10-27 19:51:12,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:51:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:51:12,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:51:12,515 INFO L87 Difference]: Start difference. First operand 135 states and 173 transitions. Second operand 17 states. [2020-10-27 19:51:13,674 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-10-27 19:51:14,200 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-27 19:51:14,705 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-10-27 19:51:15,015 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-27 19:51:16,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:16,501 INFO L93 Difference]: Finished difference Result 304 states and 367 transitions. [2020-10-27 19:51:16,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 19:51:16,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-27 19:51:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:16,504 INFO L225 Difference]: With dead ends: 304 [2020-10-27 19:51:16,504 INFO L226 Difference]: Without dead ends: 300 [2020-10-27 19:51:16,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=411, Invalid=1845, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 19:51:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-27 19:51:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 145. [2020-10-27 19:51:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 19:51:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2020-10-27 19:51:16,535 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 39 [2020-10-27 19:51:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:16,535 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2020-10-27 19:51:16,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:51:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2020-10-27 19:51:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:51:16,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:16,536 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:16,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:51:16,537 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1965709915, now seen corresponding path program 5 times [2020-10-27 19:51:16,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:16,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594864420] [2020-10-27 19:51:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:16,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:16,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:16,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:16,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:16,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:18,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:19,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:19,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:51:19,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:51:19,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2639 [2020-10-27 19:51:19,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:51:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:51:19,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:19,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:19,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:19,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:19,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:19,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:19,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:19,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:19,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 19:51:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594864420] [2020-10-27 19:51:19,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:19,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:51:19,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415924135] [2020-10-27 19:51:19,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:51:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:51:19,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:51:19,298 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand 10 states. [2020-10-27 19:51:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:19,570 INFO L93 Difference]: Finished difference Result 259 states and 329 transitions. [2020-10-27 19:51:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:51:19,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 19:51:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:19,573 INFO L225 Difference]: With dead ends: 259 [2020-10-27 19:51:19,573 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 19:51:19,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:51:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 19:51:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2020-10-27 19:51:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 19:51:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2020-10-27 19:51:19,600 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 39 [2020-10-27 19:51:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:19,600 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2020-10-27 19:51:19,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:51:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2020-10-27 19:51:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:51:19,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:19,601 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:19,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:51:19,601 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 83598307, now seen corresponding path program 1 times [2020-10-27 19:51:19,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:19,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726507038] [2020-10-27 19:51:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:19,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:19,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:19,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:19,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:19,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:20,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:20,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:51:24,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:25,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:25,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:25,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:25,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:25,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:25,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:25,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:25,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726507038] [2020-10-27 19:51:25,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:25,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:51:25,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033055795] [2020-10-27 19:51:25,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:51:25,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:51:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:51:25,035 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand 13 states. [2020-10-27 19:51:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:26,126 INFO L93 Difference]: Finished difference Result 225 states and 270 transitions. [2020-10-27 19:51:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:51:26,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 19:51:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:26,128 INFO L225 Difference]: With dead ends: 225 [2020-10-27 19:51:26,128 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 19:51:26,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:51:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 19:51:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 85. [2020-10-27 19:51:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 19:51:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2020-10-27 19:51:26,149 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 39 [2020-10-27 19:51:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:26,150 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2020-10-27 19:51:26,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:51:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2020-10-27 19:51:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:51:26,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:26,151 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:26,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:51:26,151 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:26,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2099723421, now seen corresponding path program 6 times [2020-10-27 19:51:26,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:26,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596418139] [2020-10-27 19:51:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:26,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:26,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:29,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:29,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:51:29,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:51:29,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3291 [2020-10-27 19:51:29,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:51:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:51:29,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:29,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:29,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:29,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:29,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:29,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:29,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:29,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596418139] [2020-10-27 19:51:29,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:29,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:51:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173344322] [2020-10-27 19:51:29,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:51:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:51:29,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:29,735 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 12 states. [2020-10-27 19:51:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:31,406 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2020-10-27 19:51:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:51:31,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 19:51:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:31,408 INFO L225 Difference]: With dead ends: 207 [2020-10-27 19:51:31,408 INFO L226 Difference]: Without dead ends: 203 [2020-10-27 19:51:31,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:51:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-27 19:51:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 50. [2020-10-27 19:51:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 19:51:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-27 19:51:31,423 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 39 [2020-10-27 19:51:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:31,423 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-27 19:51:31,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:51:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-27 19:51:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:51:31,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:31,424 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:31,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:51:31,424 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1824617221, now seen corresponding path program 2 times [2020-10-27 19:51:31,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:31,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990667848] [2020-10-27 19:51:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:31,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:31,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:31,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:51:31,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:31,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 19:51:31,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:51:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:51:31,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:31,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:31,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:31,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:31,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:31,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:31,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:31,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:31,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:31,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:31,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:31,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990667848] [2020-10-27 19:51:31,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:31,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:51:31,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129676595] [2020-10-27 19:51:31,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:51:31,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:31,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:51:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:51:31,855 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 11 states. [2020-10-27 19:51:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:32,861 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-10-27 19:51:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:51:32,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 19:51:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:32,863 INFO L225 Difference]: With dead ends: 144 [2020-10-27 19:51:32,863 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 19:51:32,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:51:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 19:51:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 92. [2020-10-27 19:51:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 19:51:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-10-27 19:51:32,894 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 41 [2020-10-27 19:51:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:32,894 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-10-27 19:51:32,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:51:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-10-27 19:51:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:51:32,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:32,895 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:32,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:51:32,896 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:32,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:32,896 INFO L82 PathProgramCache]: Analyzing trace with hash 242209915, now seen corresponding path program 3 times [2020-10-27 19:51:32,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:32,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390700643] [2020-10-27 19:51:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:32,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:33,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:33,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:51:33,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:33,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 19:51:33,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:33,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:51:33,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:33,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:51:33,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:33,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:33,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:33,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390700643] [2020-10-27 19:51:33,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:33,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:51:33,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18444388] [2020-10-27 19:51:33,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:51:33,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:51:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:51:33,376 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 13 states. [2020-10-27 19:51:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:34,426 INFO L93 Difference]: Finished difference Result 168 states and 194 transitions. [2020-10-27 19:51:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:51:34,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 19:51:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:34,428 INFO L225 Difference]: With dead ends: 168 [2020-10-27 19:51:34,428 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 19:51:34,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:51:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 19:51:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 94. [2020-10-27 19:51:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 19:51:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-10-27 19:51:34,454 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 41 [2020-10-27 19:51:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:34,455 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-10-27 19:51:34,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:51:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-10-27 19:51:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:51:34,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:34,456 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:34,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:51:34,456 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1898837371, now seen corresponding path program 4 times [2020-10-27 19:51:34,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:34,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037893205] [2020-10-27 19:51:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:34,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:35,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:35,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:51:35,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:51:35,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1334 [2020-10-27 19:51:35,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:51:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:51:35,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:36,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:36,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:36,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:36,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:36,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:36,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:36,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:36,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:36,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037893205] [2020-10-27 19:51:36,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:36,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:51:36,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206114599] [2020-10-27 19:51:36,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:51:36,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:36,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:51:36,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:51:36,066 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 13 states. [2020-10-27 19:51:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:37,738 INFO L93 Difference]: Finished difference Result 300 states and 349 transitions. [2020-10-27 19:51:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:51:37,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 19:51:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:37,741 INFO L225 Difference]: With dead ends: 300 [2020-10-27 19:51:37,741 INFO L226 Difference]: Without dead ends: 296 [2020-10-27 19:51:37,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:51:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-27 19:51:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 137. [2020-10-27 19:51:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 19:51:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-10-27 19:51:37,777 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 41 [2020-10-27 19:51:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:37,777 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-10-27 19:51:37,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:51:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-10-27 19:51:37,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:51:37,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:37,778 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:37,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:51:37,778 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -329302789, now seen corresponding path program 2 times [2020-10-27 19:51:37,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:37,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495028812] [2020-10-27 19:51:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:37,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:38,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:38,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:38,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:38,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:38,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:42,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:42,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:51:42,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 19:51:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:51:42,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:51:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:51:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:43,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:43,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:43,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:43,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:43,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:43,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:43,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:43,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:43,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:43,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:43,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:43,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495028812] [2020-10-27 19:51:43,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:43,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:51:43,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130404608] [2020-10-27 19:51:43,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:51:43,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:51:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:51:43,337 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 14 states. [2020-10-27 19:51:44,192 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-27 19:51:44,441 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-27 19:51:44,614 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-27 19:51:44,849 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-27 19:51:45,207 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 19:51:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:45,420 INFO L93 Difference]: Finished difference Result 306 states and 360 transitions. [2020-10-27 19:51:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:51:45,421 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-27 19:51:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:45,423 INFO L225 Difference]: With dead ends: 306 [2020-10-27 19:51:45,423 INFO L226 Difference]: Without dead ends: 302 [2020-10-27 19:51:45,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:51:45,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-27 19:51:45,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 146. [2020-10-27 19:51:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 19:51:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 186 transitions. [2020-10-27 19:51:45,483 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 186 transitions. Word has length 41 [2020-10-27 19:51:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:45,484 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 186 transitions. [2020-10-27 19:51:45,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:51:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 186 transitions. [2020-10-27 19:51:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:51:45,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:45,485 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:45,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:51:45,485 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1123017347, now seen corresponding path program 2 times [2020-10-27 19:51:45,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:45,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427063565] [2020-10-27 19:51:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:46,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:46,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:51:46,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 921 [2020-10-27 19:51:46,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:51:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:51:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:46,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:46,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:46,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427063565] [2020-10-27 19:51:46,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:46,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:51:46,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379424655] [2020-10-27 19:51:46,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:51:46,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:51:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:46,612 INFO L87 Difference]: Start difference. First operand 146 states and 186 transitions. Second operand 12 states. [2020-10-27 19:51:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:47,808 INFO L93 Difference]: Finished difference Result 153 states and 193 transitions. [2020-10-27 19:51:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:51:47,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-27 19:51:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:47,811 INFO L225 Difference]: With dead ends: 153 [2020-10-27 19:51:47,811 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 19:51:47,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:51:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 19:51:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 52. [2020-10-27 19:51:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:51:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-27 19:51:47,830 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2020-10-27 19:51:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:47,831 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-27 19:51:47,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:51:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-27 19:51:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:51:47,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:47,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:47,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:51:47,832 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:47,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1998507874, now seen corresponding path program 5 times [2020-10-27 19:51:47,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:47,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677983586] [2020-10-27 19:51:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:48,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:48,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:51:48,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:48,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-27 19:51:48,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:51:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:51:48,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:48,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:48,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:48,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:48,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:48,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:48,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:51:48,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:48,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:48,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677983586] [2020-10-27 19:51:48,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:48,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:51:48,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476038043] [2020-10-27 19:51:48,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:51:48,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:48,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:51:48,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:51:48,333 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 11 states. [2020-10-27 19:51:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:48,771 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-10-27 19:51:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:51:48,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-27 19:51:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:48,773 INFO L225 Difference]: With dead ends: 86 [2020-10-27 19:51:48,773 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 19:51:48,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:51:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 19:51:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 19:51:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 19:51:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-10-27 19:51:48,789 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 44 [2020-10-27 19:51:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:48,790 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-10-27 19:51:48,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:51:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-10-27 19:51:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:51:48,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:48,790 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:48,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:51:48,790 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash 432805498, now seen corresponding path program 6 times [2020-10-27 19:51:48,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:48,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197206760] [2020-10-27 19:51:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:48,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:48,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:49,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:49,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:49,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:53,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:53,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:51:53,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:51:53,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 19:51:53,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:53,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:51:53,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:51:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:51:53,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:54,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:54,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:54,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:54,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:54,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:54,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:54,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:54,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:54,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:54,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:54,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:54,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197206760] [2020-10-27 19:51:54,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:54,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:51:54,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818689147] [2020-10-27 19:51:54,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:51:54,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:51:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:51:54,434 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 17 states. [2020-10-27 19:51:55,803 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-27 19:51:56,006 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-27 19:51:56,181 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-27 19:51:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:58,421 INFO L93 Difference]: Finished difference Result 240 states and 280 transitions. [2020-10-27 19:51:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:51:58,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 19:51:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:58,423 INFO L225 Difference]: With dead ends: 240 [2020-10-27 19:51:58,423 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 19:51:58,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:51:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 19:51:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 129. [2020-10-27 19:51:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 19:51:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-10-27 19:51:58,476 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 49 [2020-10-27 19:51:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:58,476 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-10-27 19:51:58,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:51:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-10-27 19:51:58,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:51:58,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:58,477 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:58,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:51:58,478 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash -251798022, now seen corresponding path program 7 times [2020-10-27 19:51:58,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:58,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943980365] [2020-10-27 19:51:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:58,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:58,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:58,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:59,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:00,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:00,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:52:00,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:52:00,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2324 [2020-10-27 19:52:00,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:00,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:52:00,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:52:00,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:52:00,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:01,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:01,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:01,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:01,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:01,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:01,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:01,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943980365] [2020-10-27 19:52:01,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:01,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:52:01,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205697385] [2020-10-27 19:52:01,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:52:01,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:52:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:52:01,401 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 17 states. [2020-10-27 19:52:04,706 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-27 19:52:06,402 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-27 19:52:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:07,473 INFO L93 Difference]: Finished difference Result 552 states and 637 transitions. [2020-10-27 19:52:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 19:52:07,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 19:52:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:07,476 INFO L225 Difference]: With dead ends: 552 [2020-10-27 19:52:07,477 INFO L226 Difference]: Without dead ends: 548 [2020-10-27 19:52:07,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=701, Invalid=3855, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 19:52:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-27 19:52:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 182. [2020-10-27 19:52:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 19:52:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 231 transitions. [2020-10-27 19:52:07,538 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 231 transitions. Word has length 49 [2020-10-27 19:52:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:07,538 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 231 transitions. [2020-10-27 19:52:07,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:52:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 231 transitions. [2020-10-27 19:52:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:52:07,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:07,539 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:07,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:52:07,539 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:07,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:07,540 INFO L82 PathProgramCache]: Analyzing trace with hash -55744902, now seen corresponding path program 8 times [2020-10-27 19:52:07,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:07,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552181730] [2020-10-27 19:52:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:07,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:07,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:07,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:08,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:08,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:52:08,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:52:08,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-27 19:52:08,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:08,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:52:08,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:52:08,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:52:08,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:08,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:08,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:08,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:08,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:08,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:08,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:52:08,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:08,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:08,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:08,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:08,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:09,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552181730] [2020-10-27 19:52:09,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:09,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:52:09,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621177804] [2020-10-27 19:52:09,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:52:09,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:09,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:52:09,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:52:09,004 INFO L87 Difference]: Start difference. First operand 182 states and 231 transitions. Second operand 14 states. [2020-10-27 19:52:09,743 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 19:52:10,350 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-27 19:52:10,487 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-27 19:52:10,788 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-27 19:52:11,159 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-27 19:52:11,299 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 19:52:11,869 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-27 19:52:12,304 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-27 19:52:12,880 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 19:52:13,373 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 19:52:13,710 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 19:52:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:14,058 INFO L93 Difference]: Finished difference Result 667 states and 805 transitions. [2020-10-27 19:52:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 19:52:14,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 19:52:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:14,062 INFO L225 Difference]: With dead ends: 667 [2020-10-27 19:52:14,062 INFO L226 Difference]: Without dead ends: 663 [2020-10-27 19:52:14,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=559, Invalid=2197, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:52:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-10-27 19:52:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 303. [2020-10-27 19:52:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-27 19:52:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 400 transitions. [2020-10-27 19:52:14,188 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 400 transitions. Word has length 49 [2020-10-27 19:52:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:14,189 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 400 transitions. [2020-10-27 19:52:14,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:52:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 400 transitions. [2020-10-27 19:52:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:52:14,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:14,190 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:14,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:52:14,190 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:14,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2012545286, now seen corresponding path program 9 times [2020-10-27 19:52:14,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:14,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635032679] [2020-10-27 19:52:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:14,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:14,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:52:15,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:15,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:15,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:15,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:15,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:15,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:15,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:52:15,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:15,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:15,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:15,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:15,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:15,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635032679] [2020-10-27 19:52:15,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:15,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:52:15,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777763336] [2020-10-27 19:52:15,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:52:15,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:52:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:52:15,887 INFO L87 Difference]: Start difference. First operand 303 states and 400 transitions. Second operand 16 states. [2020-10-27 19:52:17,265 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-27 19:52:17,430 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 19:52:17,611 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 19:52:17,898 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-27 19:52:18,058 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 19:52:18,731 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-27 19:52:19,027 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 19:52:19,246 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-27 19:52:19,460 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 19:52:20,626 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 19:52:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:20,937 INFO L93 Difference]: Finished difference Result 647 states and 806 transitions. [2020-10-27 19:52:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 19:52:20,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 19:52:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:20,941 INFO L225 Difference]: With dead ends: 647 [2020-10-27 19:52:20,941 INFO L226 Difference]: Without dead ends: 643 [2020-10-27 19:52:20,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:52:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-10-27 19:52:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 378. [2020-10-27 19:52:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-27 19:52:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 508 transitions. [2020-10-27 19:52:21,159 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 508 transitions. Word has length 49 [2020-10-27 19:52:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:21,159 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 508 transitions. [2020-10-27 19:52:21,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:52:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 508 transitions. [2020-10-27 19:52:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:52:21,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:21,167 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:21,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:52:21,168 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1597818490, now seen corresponding path program 10 times [2020-10-27 19:52:21,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:21,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755068771] [2020-10-27 19:52:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:21,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:21,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:21,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:52:21,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:21,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-27 19:52:21,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:52:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:52:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:52:21,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:21,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:21,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:21,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:21,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:21,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:21,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:21,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755068771] [2020-10-27 19:52:21,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:21,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:52:21,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606554999] [2020-10-27 19:52:21,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:52:21,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:21,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:52:21,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:52:21,881 INFO L87 Difference]: Start difference. First operand 378 states and 508 transitions. Second operand 14 states. [2020-10-27 19:52:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:23,661 INFO L93 Difference]: Finished difference Result 630 states and 803 transitions. [2020-10-27 19:52:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:52:23,661 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 19:52:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:23,664 INFO L225 Difference]: With dead ends: 630 [2020-10-27 19:52:23,664 INFO L226 Difference]: Without dead ends: 626 [2020-10-27 19:52:23,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:52:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-10-27 19:52:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 414. [2020-10-27 19:52:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-27 19:52:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 560 transitions. [2020-10-27 19:52:23,813 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 560 transitions. Word has length 49 [2020-10-27 19:52:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:23,813 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 560 transitions. [2020-10-27 19:52:23,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:52:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 560 transitions. [2020-10-27 19:52:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:52:23,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:23,814 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:23,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:52:23,815 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:23,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1793871610, now seen corresponding path program 4 times [2020-10-27 19:52:23,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:23,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904863064] [2020-10-27 19:52:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:24,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:24,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:52:24,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:24,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-27 19:52:24,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:52:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:52:24,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:52:24,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:24,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:24,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:24,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:24,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:24,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:24,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:24,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:24,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:24,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904863064] [2020-10-27 19:52:24,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:24,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:52:24,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373679423] [2020-10-27 19:52:24,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:52:24,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:24,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:52:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:52:24,404 INFO L87 Difference]: Start difference. First operand 414 states and 560 transitions. Second operand 13 states. [2020-10-27 19:52:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:26,479 INFO L93 Difference]: Finished difference Result 634 states and 814 transitions. [2020-10-27 19:52:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:52:26,480 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 19:52:26,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:26,483 INFO L225 Difference]: With dead ends: 634 [2020-10-27 19:52:26,483 INFO L226 Difference]: Without dead ends: 630 [2020-10-27 19:52:26,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:52:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-10-27 19:52:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 433. [2020-10-27 19:52:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-27 19:52:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 591 transitions. [2020-10-27 19:52:26,644 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 591 transitions. Word has length 49 [2020-10-27 19:52:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:26,645 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 591 transitions. [2020-10-27 19:52:26,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:52:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 591 transitions. [2020-10-27 19:52:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:52:26,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:26,646 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:26,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:52:26,647 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:26,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2097165188, now seen corresponding path program 11 times [2020-10-27 19:52:26,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:26,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343789094] [2020-10-27 19:52:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:26,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:26,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:26,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:27,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:28,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:28,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:52:28,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:52:28,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2249 [2020-10-27 19:52:28,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:28,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:52:28,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:52:28,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:52:28,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:29,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:29,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:29,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:29,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:29,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:29,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:29,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:29,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343789094] [2020-10-27 19:52:29,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:29,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:52:29,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246558340] [2020-10-27 19:52:29,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:52:29,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:29,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:52:29,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:52:29,460 INFO L87 Difference]: Start difference. First operand 433 states and 591 transitions. Second operand 16 states. [2020-10-27 19:52:31,062 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-27 19:52:31,218 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 19:52:31,655 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 19:52:32,015 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-27 19:52:32,301 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 19:52:32,563 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-27 19:52:32,718 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 19:52:33,115 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-27 19:52:33,448 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-27 19:52:33,609 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 19:52:33,856 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-27 19:52:34,149 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 19:52:34,546 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-27 19:52:34,707 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-27 19:52:35,332 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-27 19:52:35,497 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-27 19:52:36,694 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 19:52:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:37,190 INFO L93 Difference]: Finished difference Result 785 states and 979 transitions. [2020-10-27 19:52:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 19:52:37,191 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 19:52:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:37,194 INFO L225 Difference]: With dead ends: 785 [2020-10-27 19:52:37,194 INFO L226 Difference]: Without dead ends: 781 [2020-10-27 19:52:37,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=877, Invalid=4379, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 19:52:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-10-27 19:52:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 430. [2020-10-27 19:52:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-27 19:52:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 586 transitions. [2020-10-27 19:52:37,361 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 586 transitions. Word has length 49 [2020-10-27 19:52:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:37,361 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 586 transitions. [2020-10-27 19:52:37,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:52:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 586 transitions. [2020-10-27 19:52:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:52:37,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:37,362 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:37,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:52:37,362 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash 367901820, now seen corresponding path program 12 times [2020-10-27 19:52:37,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:37,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437750227] [2020-10-27 19:52:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:37,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:37,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:37,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:37,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:37,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:39,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:40,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:52:42,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:42,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:42,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:42,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:42,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:42,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:52:42,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:42,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:42,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437750227] [2020-10-27 19:52:42,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:42,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:52:42,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551455182] [2020-10-27 19:52:42,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:52:42,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:52:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:52:42,899 INFO L87 Difference]: Start difference. First operand 430 states and 586 transitions. Second operand 17 states. [2020-10-27 19:52:44,682 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-10-27 19:52:45,216 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-10-27 19:52:45,538 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-10-27 19:52:46,113 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-27 19:52:46,648 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-10-27 19:52:47,750 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-27 19:52:48,321 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-27 19:52:48,845 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-27 19:52:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:49,967 INFO L93 Difference]: Finished difference Result 823 states and 1034 transitions. [2020-10-27 19:52:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 19:52:49,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 19:52:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:49,971 INFO L225 Difference]: With dead ends: 823 [2020-10-27 19:52:49,971 INFO L226 Difference]: Without dead ends: 819 [2020-10-27 19:52:49,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=543, Invalid=4013, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 19:52:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-27 19:52:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 389. [2020-10-27 19:52:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-27 19:52:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 528 transitions. [2020-10-27 19:52:50,128 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 528 transitions. Word has length 49 [2020-10-27 19:52:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:50,128 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 528 transitions. [2020-10-27 19:52:50,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:52:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 528 transitions. [2020-10-27 19:52:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:52:50,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:50,130 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:50,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:52:50,130 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:50,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:50,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1588898564, now seen corresponding path program 13 times [2020-10-27 19:52:50,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:50,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035953696] [2020-10-27 19:52:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:50,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:50,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:50,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:50,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:50,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:50,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:51,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:55,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:55,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:52:55,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:52:55,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 19:52:55,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:55,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:52:55,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:52:55,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:52:55,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:55,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:55,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:55,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:55,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:55,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:55,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:52:55,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:55,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:55,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:55,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:55,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:55,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035953696] [2020-10-27 19:52:55,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:55,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:52:55,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942389000] [2020-10-27 19:52:55,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:52:55,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:55,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:52:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:52:55,627 INFO L87 Difference]: Start difference. First operand 389 states and 528 transitions. Second operand 15 states. [2020-10-27 19:52:56,409 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-27 19:52:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:58,064 INFO L93 Difference]: Finished difference Result 648 states and 833 transitions. [2020-10-27 19:52:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:52:58,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 19:52:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:58,068 INFO L225 Difference]: With dead ends: 648 [2020-10-27 19:52:58,068 INFO L226 Difference]: Without dead ends: 644 [2020-10-27 19:52:58,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:52:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-10-27 19:52:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 459. [2020-10-27 19:52:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-27 19:52:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 629 transitions. [2020-10-27 19:52:58,253 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 629 transitions. Word has length 49 [2020-10-27 19:52:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:58,253 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 629 transitions. [2020-10-27 19:52:58,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:52:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 629 transitions. [2020-10-27 19:52:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:52:58,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:58,255 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:58,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:52:58,255 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:58,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1392845444, now seen corresponding path program 14 times [2020-10-27 19:52:58,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:58,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755696586] [2020-10-27 19:52:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:58,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:59,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:59,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:03,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:03,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:53:03,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:53:03,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:53:03,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:03,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:53:03,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:53:03,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:53:03,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:03,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:03,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:03,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:03,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:03,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:53:03,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:03,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755696586] [2020-10-27 19:53:03,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:03,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:53:03,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754832580] [2020-10-27 19:53:03,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:53:03,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:03,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:53:03,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:53:03,741 INFO L87 Difference]: Start difference. First operand 459 states and 629 transitions. Second operand 14 states. [2020-10-27 19:53:04,476 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-27 19:53:05,110 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-27 19:53:05,690 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-27 19:53:06,093 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 19:53:06,406 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-27 19:53:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:07,050 INFO L93 Difference]: Finished difference Result 668 states and 854 transitions. [2020-10-27 19:53:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:53:07,051 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 19:53:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:07,054 INFO L225 Difference]: With dead ends: 668 [2020-10-27 19:53:07,054 INFO L226 Difference]: Without dead ends: 664 [2020-10-27 19:53:07,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:53:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2020-10-27 19:53:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 413. [2020-10-27 19:53:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-27 19:53:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 566 transitions. [2020-10-27 19:53:07,244 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 566 transitions. Word has length 49 [2020-10-27 19:53:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:07,244 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 566 transitions. [2020-10-27 19:53:07,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:53:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 566 transitions. [2020-10-27 19:53:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:53:07,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:07,246 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:07,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 19:53:07,246 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2021465212, now seen corresponding path program 15 times [2020-10-27 19:53:07,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:07,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746793890] [2020-10-27 19:53:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:07,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:07,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:08,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:08,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:08,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:12,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:12,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:53:12,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:53:12,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 19:53:12,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:12,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:53:12,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:53:12,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:53:12,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:12,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:12,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:12,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:12,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:12,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:12,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:53:12,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:12,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:12,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746793890] [2020-10-27 19:53:12,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:12,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:53:12,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54758710] [2020-10-27 19:53:12,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:53:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:53:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:53:12,922 INFO L87 Difference]: Start difference. First operand 413 states and 566 transitions. Second operand 14 states. [2020-10-27 19:53:13,703 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 19:53:14,167 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-27 19:53:14,576 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-27 19:53:14,795 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 19:53:15,006 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-27 19:53:15,170 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-27 19:53:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:15,393 INFO L93 Difference]: Finished difference Result 707 states and 931 transitions. [2020-10-27 19:53:15,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:53:15,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 19:53:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:15,397 INFO L225 Difference]: With dead ends: 707 [2020-10-27 19:53:15,398 INFO L226 Difference]: Without dead ends: 703 [2020-10-27 19:53:15,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:53:15,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-27 19:53:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 380. [2020-10-27 19:53:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-27 19:53:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 514 transitions. [2020-10-27 19:53:15,553 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 514 transitions. Word has length 49 [2020-10-27 19:53:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:15,553 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 514 transitions. [2020-10-27 19:53:15,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:53:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 514 transitions. [2020-10-27 19:53:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:53:15,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:15,554 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:15,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 19:53:15,555 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2077448964, now seen corresponding path program 3 times [2020-10-27 19:53:15,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:15,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521789795] [2020-10-27 19:53:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:15,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:15,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:15,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:15,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:16,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:19,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:20,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:20,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:53:20,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:53:20,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 19:53:20,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:53:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:53:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:53:20,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:20,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:20,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:20,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:20,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:53:20,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:20,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521789795] [2020-10-27 19:53:20,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:20,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:53:20,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305380588] [2020-10-27 19:53:20,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:53:20,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:20,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:53:20,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:53:20,941 INFO L87 Difference]: Start difference. First operand 380 states and 514 transitions. Second operand 13 states. [2020-10-27 19:53:22,020 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 19:53:22,200 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 19:53:22,459 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-27 19:53:22,651 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-27 19:53:23,107 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 19:53:23,443 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 19:53:23,721 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 19:53:23,992 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-27 19:53:24,299 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 19:53:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:24,538 INFO L93 Difference]: Finished difference Result 566 states and 726 transitions. [2020-10-27 19:53:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:53:24,539 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 19:53:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:24,542 INFO L225 Difference]: With dead ends: 566 [2020-10-27 19:53:24,542 INFO L226 Difference]: Without dead ends: 562 [2020-10-27 19:53:24,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 19:53:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-10-27 19:53:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 315. [2020-10-27 19:53:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-27 19:53:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 418 transitions. [2020-10-27 19:53:24,711 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 418 transitions. Word has length 49 [2020-10-27 19:53:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:24,712 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 418 transitions. [2020-10-27 19:53:24,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:53:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 418 transitions. [2020-10-27 19:53:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:53:24,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:24,713 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:24,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 19:53:24,713 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash -988914946, now seen corresponding path program 2 times [2020-10-27 19:53:24,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:24,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509736079] [2020-10-27 19:53:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:24,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:24,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:24,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:24,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:25,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:25,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:25,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:25,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:25,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:25,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:26,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:27,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:29,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:29,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:53:29,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 19:53:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 19:53:29,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:53:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:53:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:53:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:30,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:30,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:30,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:30,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:30,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:30,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:53:30,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:30,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:30,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509736079] [2020-10-27 19:53:30,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:30,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:53:30,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901935189] [2020-10-27 19:53:30,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:53:30,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:53:30,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:53:30,459 INFO L87 Difference]: Start difference. First operand 315 states and 418 transitions. Second operand 17 states. [2020-10-27 19:53:31,306 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-27 19:53:31,458 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-27 19:53:32,053 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-27 19:53:32,305 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 101 [2020-10-27 19:53:32,797 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-10-27 19:53:33,098 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2020-10-27 19:53:33,850 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2020-10-27 19:53:34,179 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-27 19:53:34,443 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-10-27 19:53:35,016 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-27 19:53:35,420 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-10-27 19:53:35,638 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 19:53:35,894 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-27 19:53:36,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:36,300 INFO L93 Difference]: Finished difference Result 551 states and 684 transitions. [2020-10-27 19:53:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 19:53:36,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 19:53:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:36,304 INFO L225 Difference]: With dead ends: 551 [2020-10-27 19:53:36,304 INFO L226 Difference]: Without dead ends: 547 [2020-10-27 19:53:36,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=502, Invalid=2048, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:53:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-27 19:53:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 244. [2020-10-27 19:53:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-27 19:53:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 320 transitions. [2020-10-27 19:53:36,423 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 320 transitions. Word has length 49 [2020-10-27 19:53:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:36,424 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 320 transitions. [2020-10-27 19:53:36,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:53:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 320 transitions. [2020-10-27 19:53:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:53:36,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:36,425 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:36,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 19:53:36,425 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1673518466, now seen corresponding path program 16 times [2020-10-27 19:53:36,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:36,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113503145] [2020-10-27 19:53:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:36,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:36,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:36,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:36,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:37,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:37,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:53:41,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:41,789 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 19:53:42,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:42,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:42,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:42,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:53:42,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:42,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113503145] [2020-10-27 19:53:42,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:42,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:53:42,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505582352] [2020-10-27 19:53:42,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:53:42,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:42,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:53:42,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:53:42,057 INFO L87 Difference]: Start difference. First operand 244 states and 320 transitions. Second operand 15 states. [2020-10-27 19:53:42,799 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-27 19:53:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:44,620 INFO L93 Difference]: Finished difference Result 493 states and 608 transitions. [2020-10-27 19:53:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:53:44,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 19:53:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:44,624 INFO L225 Difference]: With dead ends: 493 [2020-10-27 19:53:44,624 INFO L226 Difference]: Without dead ends: 489 [2020-10-27 19:53:44,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:53:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-10-27 19:53:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 124. [2020-10-27 19:53:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 19:53:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2020-10-27 19:53:44,677 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 49 [2020-10-27 19:53:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:44,677 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2020-10-27 19:53:44,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:53:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2020-10-27 19:53:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:53:44,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:44,678 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:44,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 19:53:44,678 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:44,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1477465346, now seen corresponding path program 17 times [2020-10-27 19:53:44,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:44,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737858988] [2020-10-27 19:53:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:44,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:44,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:44,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:44,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:45,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:45,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:46,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:49,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:49,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:53:49,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:53:49,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 19:53:49,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:53:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:53:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:53:49,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0