/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/list-properties/splice-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:00:46,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:00:46,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:00:46,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:00:46,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:00:46,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:00:46,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:00:46,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:00:46,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:00:46,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:00:46,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:00:46,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:00:46,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:00:46,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:00:46,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:00:46,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:00:46,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:00:46,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:00:46,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:00:46,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:00:46,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:00:46,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:00:46,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:00:46,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:00:46,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:00:46,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:00:46,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:00:46,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:00:46,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:00:46,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:00:46,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:00:46,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:00:46,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:00:46,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:00:46,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:00:46,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:00:47,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:00:47,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:00:47,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:00:47,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:00:47,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:00:47,006 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 20:00:47,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:00:47,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:00:47,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:00:47,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:00:47,036 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:00:47,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:00:47,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:00:47,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:00:47,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:00:47,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:00:47,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:00:47,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:00:47,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:00:47,038 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:00:47,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:00:47,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:00:47,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:00:47,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:00:47,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:00:47,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:00:47,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:00:47,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:00:47,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:00:47,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:00:47,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:00:47,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:00:47,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:00:47,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:00:47,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:00:47,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:00:47,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:00:47,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:00:47,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:00:47,484 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:00:47,485 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:00:47,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-2.i [2020-10-27 20:00:47,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/336a0eb6e/b4491bd8142d42be80d1f0553fb0059a/FLAG363350a80 [2020-10-27 20:00:48,375 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:00:48,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-2.i [2020-10-27 20:00:48,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/336a0eb6e/b4491bd8142d42be80d1f0553fb0059a/FLAG363350a80 [2020-10-27 20:00:48,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/336a0eb6e/b4491bd8142d42be80d1f0553fb0059a [2020-10-27 20:00:48,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:00:48,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:00:48,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:00:48,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:00:48,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:00:48,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:00:48" (1/1) ... [2020-10-27 20:00:48,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ebe115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:48, skipping insertion in model container [2020-10-27 20:00:48,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:00:48" (1/1) ... [2020-10-27 20:00:48,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:00:48,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:00:49,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:00:49,248 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:00:49,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:00:49,408 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:00:49,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49 WrapperNode [2020-10-27 20:00:49,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:00:49,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:00:49,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:00:49,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:00:49,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (1/1) ... [2020-10-27 20:00:49,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (1/1) ... [2020-10-27 20:00:49,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (1/1) ... [2020-10-27 20:00:49,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (1/1) ... [2020-10-27 20:00:49,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (1/1) ... [2020-10-27 20:00:49,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (1/1) ... [2020-10-27 20:00:49,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (1/1) ... [2020-10-27 20:00:49,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:00:49,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:00:49,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:00:49,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:00:49,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (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 20:00:49,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:00:49,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:00:49,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:00:49,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 20:00:49,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 20:00:49,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-27 20:00:49,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-27 20:00:49,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-27 20:00:49,591 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 20:00:49,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:00:49,593 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:00:49,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:00:49,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:00:49,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:00:49,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:00:49,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:00:49,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:00:49,595 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 20:00:49,595 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 20:00:49,595 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 20:00:49,596 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 20:00:49,596 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 20:00:49,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 20:00:49,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 20:00:49,597 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 20:00:49,597 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 20:00:49,597 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 20:00:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 20:00:49,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 20:00:49,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 20:00:49,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 20:00:49,603 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 20:00:49,603 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 20:00:49,603 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 20:00:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 20:00:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-27 20:00:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-27 20:00:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-27 20:00:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 20:00:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 20:00:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 20:00:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 20:00:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 20:00:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 20:00:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 20:00:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 20:00:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 20:00:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 20:00:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 20:00:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 20:00:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 20:00:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 20:00:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 20:00:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 20:00:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 20:00:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 20:00:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 20:00:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 20:00:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 20:00:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 20:00:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 20:00:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 20:00:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 20:00:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 20:00:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 20:00:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 20:00:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 20:00:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 20:00:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 20:00:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 20:00:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 20:00:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 20:00:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:00:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 20:00:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 20:00:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 20:00:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 20:00:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 20:00:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 20:00:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 20:00:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 20:00:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 20:00:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 20:00:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 20:00:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 20:00:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 20:00:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 20:00:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 20:00:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 20:00:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 20:00:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 20:00:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 20:00:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 20:00:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 20:00:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 20:00:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 20:00:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 20:00:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 20:00:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:00:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:00:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:00:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 20:00:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 20:00:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:00:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:00:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:00:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:00:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:00:49,961 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 20:00:50,154 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:00:50,154 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 20:00:50,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:00:50 BoogieIcfgContainer [2020-10-27 20:00:50,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:00:50,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:00:50,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:00:50,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:00:50,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:00:48" (1/3) ... [2020-10-27 20:00:50,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cfae8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:00:50, skipping insertion in model container [2020-10-27 20:00:50,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:49" (2/3) ... [2020-10-27 20:00:50,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cfae8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:00:50, skipping insertion in model container [2020-10-27 20:00:50,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:00:50" (3/3) ... [2020-10-27 20:00:50,176 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-2.i [2020-10-27 20:00:50,189 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:00:50,194 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:00:50,207 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:00:50,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:00:50,244 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:00:50,244 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:00:50,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:00:50,253 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:00:50,253 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:00:50,253 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:00:50,254 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:00:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-27 20:00:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:00:50,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:50,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:50,293 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash 455186036, now seen corresponding path program 1 times [2020-10-27 20:00:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:50,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687032308] [2020-10-27 20:00:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:50,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:50,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:50,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:51,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:51,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:00:51,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:00:51,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-27 20:00:51,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:00:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:51,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:00:51,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:51,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:51,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:51,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:51,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:51,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:00:51,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:51,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:51,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:51,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:51,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:51,445 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 20:00:51,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687032308] [2020-10-27 20:00:51,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:51,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:00:51,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846413010] [2020-10-27 20:00:51,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:00:51,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:00:51,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:00:51,479 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-27 20:00:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:51,654 INFO L93 Difference]: Finished difference Result 61 states and 87 transitions. [2020-10-27 20:00:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:00:51,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-27 20:00:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:51,665 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:00:51,665 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:00:51,670 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 20:00:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:00:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 20:00:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:00:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-27 20:00:51,720 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2020-10-27 20:00:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:51,720 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-27 20:00:51,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:00:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-27 20:00:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:00:51,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:51,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:51,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:00:51,722 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:51,723 INFO L82 PathProgramCache]: Analyzing trace with hash 929438058, now seen corresponding path program 1 times [2020-10-27 20:00:51,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:51,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267571783] [2020-10-27 20:00:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:51,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:51,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:52,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:52,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:00:52,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:00:52,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-27 20:00:52,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:00:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:00:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:00:52,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:52,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:52,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:52,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:52,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:52,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:52,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:00:52,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:52,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:52,374 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 20:00:52,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267571783] [2020-10-27 20:00:52,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:52,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:00:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58762231] [2020-10-27 20:00:52,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:00:52,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:00:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:00:52,378 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 5 states. [2020-10-27 20:00:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:52,538 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-10-27 20:00:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:00:52,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 20:00:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:52,541 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:00:52,542 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:00:52,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:00:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:00:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-27 20:00:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:00:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-27 20:00:52,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2020-10-27 20:00:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:52,553 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-27 20:00:52,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:00:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-27 20:00:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:00:52,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:52,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:52,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:00:52,555 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1785249473, now seen corresponding path program 1 times [2020-10-27 20:00:52,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:52,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425891524] [2020-10-27 20:00:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:52,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:52,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:52,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:52,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:00:52,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:00:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-27 20:00:52,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:00:52,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:00:52,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:00:52,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:52,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:52,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:53,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:53,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:53,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:53,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:00:53,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:53,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:53,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:53,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:53,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:53,010 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 20:00:53,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425891524] [2020-10-27 20:00:53,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:53,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:00:53,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895223511] [2020-10-27 20:00:53,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:00:53,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:00:53,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:00:53,015 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 5 states. [2020-10-27 20:00:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:53,131 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-10-27 20:00:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:00:53,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 20:00:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:53,133 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:00:53,134 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:00:53,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:00:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:00:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 20:00:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:00:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-27 20:00:53,144 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2020-10-27 20:00:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:53,144 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-27 20:00:53,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:00:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-27 20:00:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:00:53,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:53,146 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:53,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:00:53,146 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1469752795, now seen corresponding path program 1 times [2020-10-27 20:00:53,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:53,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115398959] [2020-10-27 20:00:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:53,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:53,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:53,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:00:53,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:53,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 20:00:53,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:00:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:00:53,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:00:53,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:53,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:53,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:53,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:53,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:00:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:53,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:00:53,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115398959] [2020-10-27 20:00:53,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:53,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:00:53,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442984018] [2020-10-27 20:00:53,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:00:53,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:53,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:00:53,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:00:53,302 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 5 states. [2020-10-27 20:00:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:53,408 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2020-10-27 20:00:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:00:53,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 20:00:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:53,409 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:00:53,409 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:00:53,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:00:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:00:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-27 20:00:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:00:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-10-27 20:00:53,418 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 23 [2020-10-27 20:00:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:53,419 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-10-27 20:00:53,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:00:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-10-27 20:00:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:00:53,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:53,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:53,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:00:53,421 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:53,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1289219814, now seen corresponding path program 1 times [2020-10-27 20:00:53,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:53,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609537217] [2020-10-27 20:00:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:53,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:53,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:53,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:00:53,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:53,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-27 20:00:53,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:53,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:00:53,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:00:53,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:00:53,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:00:53,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:53,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:53,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:53,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:53,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:53,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:00:53,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:53,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:53,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:53,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:53,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:53,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609537217] [2020-10-27 20:00:53,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:53,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:00:53,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667418777] [2020-10-27 20:00:53,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:00:53,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:00:53,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:00:53,922 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 11 states. [2020-10-27 20:00:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:54,268 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2020-10-27 20:00:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:00:54,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 20:00:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:54,270 INFO L225 Difference]: With dead ends: 87 [2020-10-27 20:00:54,270 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:00:54,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:00:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:00:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-10-27 20:00:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:00:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-10-27 20:00:54,290 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 29 [2020-10-27 20:00:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:54,291 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-10-27 20:00:54,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:00:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-10-27 20:00:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:00:54,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:54,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:54,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:00:54,296 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1316803740, now seen corresponding path program 1 times [2020-10-27 20:00:54,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:54,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028064858] [2020-10-27 20:00:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:54,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:54,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:00:54,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:54,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 20:00:54,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:54,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:00:54,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:54,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:00:54,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:54,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:54,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:54,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:54,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:54,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:00:54,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:54,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:00:54,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028064858] [2020-10-27 20:00:54,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:54,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:00:54,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345966830] [2020-10-27 20:00:54,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:00:54,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:54,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:00:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:00:54,474 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 4 states. [2020-10-27 20:00:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:54,575 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2020-10-27 20:00:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:00:54,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:00:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:54,578 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:00:54,578 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:00:54,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:00:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:00:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-27 20:00:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 20:00:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-27 20:00:54,599 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 29 [2020-10-27 20:00:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:54,600 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-27 20:00:54,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:00:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-27 20:00:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:00:54,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:54,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:54,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:00:54,605 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:54,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354507, now seen corresponding path program 1 times [2020-10-27 20:00:54,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:54,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007194415] [2020-10-27 20:00:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:54,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:54,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:54,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:00:54,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:54,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 20:00:54,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:00:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:00:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:00:54,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:54,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:54,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:54,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:54,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:54,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:54,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:00:54,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:54,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:00:54,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007194415] [2020-10-27 20:00:54,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:54,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:00:54,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691201778] [2020-10-27 20:00:54,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:00:54,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:00:54,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:00:54,974 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 7 states. [2020-10-27 20:00:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:55,158 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-10-27 20:00:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:00:55,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-27 20:00:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:55,160 INFO L225 Difference]: With dead ends: 79 [2020-10-27 20:00:55,160 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:00:55,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:00:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:00:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-27 20:00:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:00:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-27 20:00:55,168 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 31 [2020-10-27 20:00:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:55,169 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-27 20:00:55,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:00:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-27 20:00:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:00:55,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:55,170 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:55,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:00:55,171 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:55,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2040267893, now seen corresponding path program 2 times [2020-10-27 20:00:55,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:55,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986291000] [2020-10-27 20:00:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:55,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:55,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:55,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:55,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:00:55,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:00:55,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-27 20:00:55,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:00:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 20:00:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:00:55,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:00:55,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:55,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:55,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:55,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:55,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:55,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:00:55,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:55,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:55,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:55,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:00:55,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986291000] [2020-10-27 20:00:55,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:55,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:00:55,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022519742] [2020-10-27 20:00:55,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:00:55,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:00:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:00:55,668 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 4 states. [2020-10-27 20:00:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:55,799 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2020-10-27 20:00:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:00:55,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 20:00:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:55,801 INFO L225 Difference]: With dead ends: 115 [2020-10-27 20:00:55,801 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:00:55,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:00:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:00:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-27 20:00:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:00:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-27 20:00:55,809 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 32 [2020-10-27 20:00:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:55,809 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-27 20:00:55,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:00:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-27 20:00:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:00:55,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:55,811 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:55,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:00:55,811 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1574641033, now seen corresponding path program 1 times [2020-10-27 20:00:55,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:55,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738154409] [2020-10-27 20:00:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:55,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:56,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:56,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:56,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:00:56,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:00:56,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-10-27 20:00:56,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:56,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:00:56,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:56,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:00:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:56,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:56,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:56,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:56,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:56,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:56,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:00:56,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:56,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:56,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:56,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:56,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:56,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738154409] [2020-10-27 20:00:56,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:56,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:00:56,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721920906] [2020-10-27 20:00:56,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:00:56,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:56,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:00:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:00:56,918 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 12 states. [2020-10-27 20:00:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:57,334 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-27 20:00:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:00:57,335 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 20:00:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:57,335 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:00:57,336 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:00:57,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:00:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:00:57,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-27 20:00:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:00:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-27 20:00:57,343 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 32 [2020-10-27 20:00:57,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:57,344 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-27 20:00:57,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:00:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-27 20:00:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:00:57,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:57,345 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:57,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:00:57,346 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:57,346 INFO L82 PathProgramCache]: Analyzing trace with hash 238403537, now seen corresponding path program 1 times [2020-10-27 20:00:57,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:57,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446092469] [2020-10-27 20:00:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:57,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:57,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:58,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:58,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:00:58,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:00:58,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-27 20:00:58,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:00:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:00:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:59,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:59,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:59,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:59,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:59,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:59,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:00:59,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:59,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:59,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:59,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:59,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446092469] [2020-10-27 20:00:59,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:59,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:00:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390497582] [2020-10-27 20:00:59,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:00:59,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:00:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:00:59,339 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 15 states. [2020-10-27 20:01:00,111 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-27 20:01:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:00,642 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-27 20:01:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:01:00,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 20:01:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:00,650 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:01:00,650 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:01:00,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:01:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:01:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2020-10-27 20:01:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:01:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-27 20:01:00,660 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 35 [2020-10-27 20:01:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:00,660 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-27 20:01:00,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:01:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-27 20:01:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:01:00,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:00,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:00,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:01:00,662 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:00,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1620859808, now seen corresponding path program 1 times [2020-10-27 20:01:00,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:00,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961058612] [2020-10-27 20:01:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:00,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:01,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:01,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:01:01,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:01,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-27 20:01:01,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:01,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:01:01,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:01,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:01:01,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:01,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:01,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:01,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:01,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:01,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:01,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:01:01,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:01,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:01:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:01,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961058612] [2020-10-27 20:01:01,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:01,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:01:01,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742115153] [2020-10-27 20:01:01,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:01:01,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:01,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:01:01,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:01:01,999 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 18 states. [2020-10-27 20:01:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:02,669 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-27 20:01:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:01:02,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-27 20:01:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:02,671 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:01:02,671 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:01:02,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:01:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:01:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-27 20:01:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 20:01:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-27 20:01:02,681 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 38 [2020-10-27 20:01:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:02,681 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-27 20:01:02,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:01:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-27 20:01:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:01:02,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:02,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:02,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:01:02,683 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash -195172683, now seen corresponding path program 1 times [2020-10-27 20:01:02,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:02,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692810270] [2020-10-27 20:01:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:02,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:03,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:03,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:04,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:04,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:01:04,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:01:04,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1915 [2020-10-27 20:01:04,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:04,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:01:04,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:01:04,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:01:04,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:05,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:05,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:05,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:05,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:05,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:05,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:05,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:05,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:05,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:05,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:05,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692810270] [2020-10-27 20:01:05,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:05,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:01:05,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411884189] [2020-10-27 20:01:05,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:01:05,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:01:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:01:05,364 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 19 states. [2020-10-27 20:01:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:07,003 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2020-10-27 20:01:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:01:07,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-27 20:01:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:07,006 INFO L225 Difference]: With dead ends: 97 [2020-10-27 20:01:07,007 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:01:07,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:01:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:01:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-10-27 20:01:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 20:01:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-10-27 20:01:07,033 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 40 [2020-10-27 20:01:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:07,034 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-10-27 20:01:07,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:01:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-10-27 20:01:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:01:07,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:07,038 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:07,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:01:07,038 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:07,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1448158459, now seen corresponding path program 1 times [2020-10-27 20:01:07,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:07,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271848111] [2020-10-27 20:01:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:07,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:07,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:01:07,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:07,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 20:01:07,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:01:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 20:01:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:01:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:07,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:07,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:07,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:07,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:07,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:07,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:07,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:07,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:07,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:07,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:07,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:01:07,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271848111] [2020-10-27 20:01:07,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:07,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:01:07,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919314797] [2020-10-27 20:01:07,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:01:07,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:01:07,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:01:07,468 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 8 states. [2020-10-27 20:01:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:07,738 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-27 20:01:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:01:07,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-27 20:01:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:07,739 INFO L225 Difference]: With dead ends: 99 [2020-10-27 20:01:07,739 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 20:01:07,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:01:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 20:01:07,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-10-27 20:01:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:01:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-27 20:01:07,749 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 40 [2020-10-27 20:01:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:07,750 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-27 20:01:07,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:01:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-27 20:01:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:01:07,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:07,751 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:07,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:01:07,752 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 577987439, now seen corresponding path program 2 times [2020-10-27 20:01:07,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:07,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927000392] [2020-10-27 20:01:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:07,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:08,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:08,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:01:08,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:08,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-27 20:01:08,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:08,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:01:08,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:08,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:01:08,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:09,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:09,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:09,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:09,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:09,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:09,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:09,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:09,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:09,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:09,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927000392] [2020-10-27 20:01:09,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:09,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:01:09,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220767887] [2020-10-27 20:01:09,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:01:09,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:09,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:01:09,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:01:09,043 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 16 states. [2020-10-27 20:01:10,049 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 20:01:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:10,527 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2020-10-27 20:01:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:01:10,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 20:01:10,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:10,529 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:01:10,529 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 20:01:10,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:01:10,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 20:01:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-10-27 20:01:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:01:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-10-27 20:01:10,539 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 41 [2020-10-27 20:01:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:10,539 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-10-27 20:01:10,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:01:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-10-27 20:01:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:01:10,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:10,540 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:10,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:01:10,540 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash -586644026, now seen corresponding path program 2 times [2020-10-27 20:01:10,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:10,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713586317] [2020-10-27 20:01:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:10,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:11,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:12,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:13,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:13,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:01:13,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:01:13,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2866 [2020-10-27 20:01:13,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:01:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:01:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:01:13,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:13,848 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-27 20:01:14,020 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-27 20:01:14,294 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-27 20:01:14,654 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-27 20:01:15,003 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-27 20:01:15,298 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-10-27 20:01:15,485 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 20:01:15,709 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-10-27 20:01:16,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:16,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:16,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:16,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:16,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:16,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:16,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:16,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:16,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713586317] [2020-10-27 20:01:16,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:16,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:01:16,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053248587] [2020-10-27 20:01:16,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:01:16,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:01:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:01:16,093 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 21 states. [2020-10-27 20:01:16,570 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 73 [2020-10-27 20:01:16,913 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 67 [2020-10-27 20:01:17,423 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 75 [2020-10-27 20:01:17,709 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-27 20:01:18,032 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 84 [2020-10-27 20:01:18,256 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 20:01:19,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:19,242 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2020-10-27 20:01:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:01:19,245 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-27 20:01:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:19,246 INFO L225 Difference]: With dead ends: 107 [2020-10-27 20:01:19,246 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:01:19,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:01:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:01:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-27 20:01:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:01:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2020-10-27 20:01:19,258 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 41 [2020-10-27 20:01:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:19,258 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2020-10-27 20:01:19,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:01:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2020-10-27 20:01:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:01:19,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:19,259 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:19,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:01:19,260 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1456077776, now seen corresponding path program 1 times [2020-10-27 20:01:19,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:19,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276216984] [2020-10-27 20:01:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:19,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:19,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:20,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:20,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:01:20,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:01:20,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-27 20:01:20,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:01:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 20:01:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:01:20,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:20,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:20,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:20,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:20,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:20,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:20,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:20,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:20,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 20:01:20,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276216984] [2020-10-27 20:01:20,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:20,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:01:20,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878053086] [2020-10-27 20:01:20,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:01:20,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:20,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:01:20,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:01:20,433 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand 7 states. [2020-10-27 20:01:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:20,622 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-27 20:01:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:01:20,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-27 20:01:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:20,624 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:01:20,624 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:01:20,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:01:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:01:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-27 20:01:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:01:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2020-10-27 20:01:20,648 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 42 [2020-10-27 20:01:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:20,648 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2020-10-27 20:01:20,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:01:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2020-10-27 20:01:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:01:20,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:20,649 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:20,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:01:20,650 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:20,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:20,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1511150448, now seen corresponding path program 1 times [2020-10-27 20:01:20,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:20,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955345699] [2020-10-27 20:01:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:21,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:21,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:01:21,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:21,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-27 20:01:21,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:21,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:01:21,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:21,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:01:21,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:21,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:21,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:21,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:21,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:21,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:21,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:21,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:21,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:21,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:01:21,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955345699] [2020-10-27 20:01:21,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:21,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:01:21,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130897390] [2020-10-27 20:01:21,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:01:21,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:21,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:01:21,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:01:21,776 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 17 states. [2020-10-27 20:01:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:22,796 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-27 20:01:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:01:22,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-27 20:01:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:22,798 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:01:22,798 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:01:22,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:01:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:01:22,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 20:01:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:01:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-27 20:01:22,807 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 42 [2020-10-27 20:01:22,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:22,807 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-27 20:01:22,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:01:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-27 20:01:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:01:22,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:22,808 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:22,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:01:22,809 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash -514974133, now seen corresponding path program 3 times [2020-10-27 20:01:22,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:22,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100878892] [2020-10-27 20:01:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:22,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:23,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:24,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:24,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:01:24,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:01:24,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1973 [2020-10-27 20:01:24,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:01:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:01:24,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:25,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:25,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:25,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:25,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:25,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:01:25,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:25,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100878892] [2020-10-27 20:01:25,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:25,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:01:25,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257342928] [2020-10-27 20:01:25,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:01:25,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:25,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:01:25,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:01:25,845 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 19 states. [2020-10-27 20:01:26,060 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 20:01:26,614 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 20:01:26,808 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-27 20:01:26,979 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 20:01:27,167 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-27 20:01:27,763 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 20:01:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:28,315 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2020-10-27 20:01:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:01:28,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-27 20:01:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:28,317 INFO L225 Difference]: With dead ends: 102 [2020-10-27 20:01:28,317 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:01:28,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:01:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:01:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2020-10-27 20:01:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:01:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-10-27 20:01:28,331 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 44 [2020-10-27 20:01:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:28,332 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-10-27 20:01:28,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:01:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-10-27 20:01:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:01:28,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:28,333 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:28,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:01:28,334 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash -675996252, now seen corresponding path program 4 times [2020-10-27 20:01:28,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:28,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279024018] [2020-10-27 20:01:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:28,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:29,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:29,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:01:29,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:29,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-27 20:01:29,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:29,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:01:29,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:29,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:01:29,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:30,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:30,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:30,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:30,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:30,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:30,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:30,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279024018] [2020-10-27 20:01:30,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:30,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:01:30,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136529964] [2020-10-27 20:01:30,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:01:30,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:30,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:01:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:01:30,529 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 21 states. [2020-10-27 20:01:31,297 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 20:01:31,482 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-27 20:01:31,826 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-27 20:01:32,146 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 20:01:32,778 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 20:01:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:33,280 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-10-27 20:01:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:01:33,282 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-27 20:01:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:33,283 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:01:33,283 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:01:33,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:01:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:01:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2020-10-27 20:01:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:01:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2020-10-27 20:01:33,298 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 47 [2020-10-27 20:01:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:33,298 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2020-10-27 20:01:33,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:01:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2020-10-27 20:01:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:01:33,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:33,299 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:33,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:01:33,300 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash 765395837, now seen corresponding path program 3 times [2020-10-27 20:01:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:33,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853396368] [2020-10-27 20:01:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:33,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:33,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:36,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:36,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:01:36,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:01:36,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3078 [2020-10-27 20:01:36,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:36,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:01:36,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:36,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:01:36,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:37,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:37,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:37,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:37,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:37,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:37,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:37,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:37,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:37,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:37,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:37,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:37,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853396368] [2020-10-27 20:01:37,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:37,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:01:37,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234039543] [2020-10-27 20:01:37,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:01:37,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:01:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:01:37,372 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand 20 states. [2020-10-27 20:01:38,408 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-27 20:01:38,625 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2020-10-27 20:01:38,819 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-27 20:01:39,177 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-27 20:01:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:39,682 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2020-10-27 20:01:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:01:39,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-27 20:01:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:39,684 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:01:39,684 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 20:01:39,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:01:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 20:01:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-10-27 20:01:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 20:01:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-27 20:01:39,695 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 47 [2020-10-27 20:01:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:39,695 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-27 20:01:39,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:01:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-27 20:01:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:01:39,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:39,696 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:39,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:01:39,696 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1580605177, now seen corresponding path program 2 times [2020-10-27 20:01:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:39,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852857216] [2020-10-27 20:01:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:39,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:39,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:41,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:41,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:41,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:01:41,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:01:41,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-27 20:01:41,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:01:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:01:41,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:42,247 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-27 20:01:43,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:43,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:43,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:43,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:43,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:43,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:43,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:43,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:43,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:43,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:43,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:43,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852857216] [2020-10-27 20:01:43,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:43,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:01:43,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579949942] [2020-10-27 20:01:43,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:01:43,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:43,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:01:43,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:01:43,060 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 24 states. [2020-10-27 20:01:43,771 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-27 20:01:44,238 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-10-27 20:01:44,431 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2020-10-27 20:01:44,632 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-27 20:01:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:46,151 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2020-10-27 20:01:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:01:46,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-27 20:01:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:46,153 INFO L225 Difference]: With dead ends: 119 [2020-10-27 20:01:46,153 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:01:46,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:01:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:01:46,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-27 20:01:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:01:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-10-27 20:01:46,164 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 49 [2020-10-27 20:01:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:46,164 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-10-27 20:01:46,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:01:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-10-27 20:01:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:01:46,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:46,165 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:46,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:01:46,165 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1071030977, now seen corresponding path program 2 times [2020-10-27 20:01:46,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:46,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010151596] [2020-10-27 20:01:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:46,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:47,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:47,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:01:47,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:47,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1289 [2020-10-27 20:01:47,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:01:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:01:47,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:48,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:48,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:48,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:48,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:48,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:48,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:48,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:48,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:48,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:48,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:48,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:48,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010151596] [2020-10-27 20:01:48,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:48,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:01:48,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382121523] [2020-10-27 20:01:48,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:01:48,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:48,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:01:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:01:48,902 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 25 states. [2020-10-27 20:01:49,691 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-27 20:01:49,870 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-27 20:01:50,063 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2020-10-27 20:01:50,296 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-27 20:01:50,806 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2020-10-27 20:01:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:52,020 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2020-10-27 20:01:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:01:52,024 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-10-27 20:01:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:52,025 INFO L225 Difference]: With dead ends: 119 [2020-10-27 20:01:52,025 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:01:52,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:01:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:01:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-27 20:01:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:01:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2020-10-27 20:01:52,037 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 49 [2020-10-27 20:01:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:52,037 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2020-10-27 20:01:52,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:01:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2020-10-27 20:01:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:01:52,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:52,038 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:52,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:01:52,039 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash 472584621, now seen corresponding path program 5 times [2020-10-27 20:01:52,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:52,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901477737] [2020-10-27 20:01:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:52,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:52,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:53,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:53,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:01:53,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:01:53,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1119 [2020-10-27 20:01:53,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:01:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:53,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:01:53,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:53,548 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-27 20:01:54,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:54,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:54,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901477737] [2020-10-27 20:01:54,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:54,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:01:54,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769571863] [2020-10-27 20:01:54,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:01:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:01:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:01:54,614 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand 24 states. [2020-10-27 20:01:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:56,809 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2020-10-27 20:01:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:01:56,809 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-27 20:01:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:56,811 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:01:56,811 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 20:01:56,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:01:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 20:01:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2020-10-27 20:01:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:01:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2020-10-27 20:01:56,824 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 50 [2020-10-27 20:01:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:56,824 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2020-10-27 20:01:56,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:01:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2020-10-27 20:01:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:01:56,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:56,825 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:56,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:01:56,825 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash -98717388, now seen corresponding path program 6 times [2020-10-27 20:01:56,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:56,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590311298] [2020-10-27 20:01:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:56,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:57,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2001 [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:01:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:59,468 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 20:01:59,606 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-27 20:02:00,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:00,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:00,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:00,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:00,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:00,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:00,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:00,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:00,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590311298] [2020-10-27 20:02:00,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:00,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:02:00,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820444628] [2020-10-27 20:02:00,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:02:00,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:02:00,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:02:00,308 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand 21 states. [2020-10-27 20:02:01,094 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-27 20:02:01,291 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-27 20:02:01,847 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 20:02:02,168 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-27 20:02:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:02,567 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2020-10-27 20:02:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:02:02,569 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-27 20:02:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:02,571 INFO L225 Difference]: With dead ends: 129 [2020-10-27 20:02:02,571 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 20:02:02,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:02:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 20:02:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-27 20:02:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 20:02:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2020-10-27 20:02:02,588 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 50 [2020-10-27 20:02:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:02,589 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2020-10-27 20:02:02,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:02:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2020-10-27 20:02:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:02:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:02,590 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:02,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:02:02,592 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1418382572, now seen corresponding path program 2 times [2020-10-27 20:02:02,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:02,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823837070] [2020-10-27 20:02:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:02,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:02,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:02,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:03,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:04,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:07,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:07,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:02:07,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:02:07,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:02:07,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:02:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:02:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:02:07,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:07,827 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2020-10-27 20:02:08,088 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-27 20:02:08,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:08,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:08,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:08,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:08,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:02:08,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:08,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 20:02:08,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823837070] [2020-10-27 20:02:08,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:08,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:02:08,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015261566] [2020-10-27 20:02:08,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:02:08,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:08,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:02:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:02:08,563 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand 15 states. [2020-10-27 20:02:09,184 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 20:02:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:09,664 INFO L93 Difference]: Finished difference Result 139 states and 160 transitions. [2020-10-27 20:02:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:02:09,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-27 20:02:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:09,666 INFO L225 Difference]: With dead ends: 139 [2020-10-27 20:02:09,666 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:02:09,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:02:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:02:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 116. [2020-10-27 20:02:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 20:02:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2020-10-27 20:02:09,680 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 51 [2020-10-27 20:02:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:09,680 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2020-10-27 20:02:09,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:02:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2020-10-27 20:02:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:02:09,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:09,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:09,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:02:09,681 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash -90643500, now seen corresponding path program 2 times [2020-10-27 20:02:09,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:09,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038438702] [2020-10-27 20:02:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:09,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:09,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:10,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:11,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:12,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:12,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:02:12,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:02:12,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3278 [2020-10-27 20:02:12,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:12,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:02:12,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:02:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:02:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:14,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:14,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:14,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:14,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:14,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:14,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:02:14,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:14,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:14,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:14,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:14,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:14,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038438702] [2020-10-27 20:02:14,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:14,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:02:14,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116500522] [2020-10-27 20:02:14,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:02:14,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:02:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:02:14,525 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand 25 states. [2020-10-27 20:02:14,752 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-27 20:02:15,419 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-27 20:02:15,648 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 20:02:15,926 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-10-27 20:02:16,239 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-27 20:02:16,689 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-27 20:02:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:18,013 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2020-10-27 20:02:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:02:18,013 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-27 20:02:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:18,015 INFO L225 Difference]: With dead ends: 144 [2020-10-27 20:02:18,015 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 20:02:18,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:02:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 20:02:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2020-10-27 20:02:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 20:02:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2020-10-27 20:02:18,031 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 51 [2020-10-27 20:02:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:18,032 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2020-10-27 20:02:18,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:02:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2020-10-27 20:02:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:02:18,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:18,033 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:18,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:02:18,033 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1552687642, now seen corresponding path program 3 times [2020-10-27 20:02:18,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:18,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887883458] [2020-10-27 20:02:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:18,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:18,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:19,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:20,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:20,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:02:20,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:02:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2574 [2020-10-27 20:02:20,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:02:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:02:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:02:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:20,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:20,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:20,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:20,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:20,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:20,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:20,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:20,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 20:02:20,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887883458] [2020-10-27 20:02:20,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:20,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:02:20,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539487097] [2020-10-27 20:02:20,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:02:20,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:02:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:02:20,934 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand 12 states. [2020-10-27 20:02:21,465 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-27 20:02:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:22,162 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-10-27 20:02:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:02:22,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 20:02:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:22,164 INFO L225 Difference]: With dead ends: 144 [2020-10-27 20:02:22,164 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 20:02:22,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:02:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 20:02:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 124. [2020-10-27 20:02:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:02:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2020-10-27 20:02:22,182 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 51 [2020-10-27 20:02:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:22,182 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2020-10-27 20:02:22,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:02:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2020-10-27 20:02:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:02:22,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:22,183 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:22,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:02:22,184 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1560229058, now seen corresponding path program 3 times [2020-10-27 20:02:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:22,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769989068] [2020-10-27 20:02:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:22,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:22,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:23,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:23,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:02:23,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:02:23,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1715 [2020-10-27 20:02:23,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:23,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:02:23,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:23,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:02:23,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:24,238 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-10-27 20:02:24,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:24,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:24,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:24,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:24,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:24,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:02:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769989068] [2020-10-27 20:02:24,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:24,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:02:24,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181053219] [2020-10-27 20:02:24,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:02:24,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:02:24,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:02:24,680 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand 18 states. [2020-10-27 20:02:24,992 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-27 20:02:25,570 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-27 20:02:25,742 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-27 20:02:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:27,201 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2020-10-27 20:02:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:02:27,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-27 20:02:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:27,203 INFO L225 Difference]: With dead ends: 152 [2020-10-27 20:02:27,208 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 20:02:27,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:02:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 20:02:27,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2020-10-27 20:02:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 20:02:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2020-10-27 20:02:27,234 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 52 [2020-10-27 20:02:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:27,235 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2020-10-27 20:02:27,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:02:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2020-10-27 20:02:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:02:27,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:27,236 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:27,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:02:27,236 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1091407096, now seen corresponding path program 4 times [2020-10-27 20:02:27,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:27,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047118696] [2020-10-27 20:02:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:27,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:28,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:28,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:28,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:02:28,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:02:28,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-27 20:02:28,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:28,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:02:28,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:28,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:02:28,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:28,973 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-10-27 20:02:29,091 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-27 20:02:29,316 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-27 20:02:29,478 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 20:02:29,691 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-27 20:02:29,848 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-27 20:02:30,109 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 20:02:30,304 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-27 20:02:30,480 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-27 20:02:31,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:31,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:31,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:31,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:31,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:31,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:31,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:31,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:31,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:31,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:31,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047118696] [2020-10-27 20:02:31,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:31,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:02:31,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746635308] [2020-10-27 20:02:31,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:02:31,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:31,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:02:31,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:02:31,254 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 25 states. [2020-10-27 20:02:31,898 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-27 20:02:32,610 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 20:02:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:33,784 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2020-10-27 20:02:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:02:33,785 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-10-27 20:02:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:33,787 INFO L225 Difference]: With dead ends: 152 [2020-10-27 20:02:33,787 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 20:02:33,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:02:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 20:02:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 125. [2020-10-27 20:02:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 20:02:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2020-10-27 20:02:33,804 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 52 [2020-10-27 20:02:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:33,804 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2020-10-27 20:02:33,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:02:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2020-10-27 20:02:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:02:33,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:33,805 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:33,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:02:33,806 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:33,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1170592465, now seen corresponding path program 1 times [2020-10-27 20:02:33,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:33,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34368410] [2020-10-27 20:02:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:33,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:34,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:34,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:38,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:38,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:02:38,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:02:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 20:02:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:02:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:02:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:02:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:39,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:39,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:39,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:39,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:39,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:39,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:39,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:39,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:39,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:39,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:39,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 20:02:39,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34368410] [2020-10-27 20:02:39,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:39,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:02:39,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54949221] [2020-10-27 20:02:39,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:02:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:02:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:02:39,154 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 12 states. [2020-10-27 20:02:39,810 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 20:02:40,007 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-27 20:02:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:40,345 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2020-10-27 20:02:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:02:40,346 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-27 20:02:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:40,348 INFO L225 Difference]: With dead ends: 152 [2020-10-27 20:02:40,348 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 20:02:40,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:02:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 20:02:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2020-10-27 20:02:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 20:02:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-10-27 20:02:40,367 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 53 [2020-10-27 20:02:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:40,368 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-10-27 20:02:40,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:02:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-10-27 20:02:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:02:40,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:40,369 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:40,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:02:40,369 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:40,370 INFO L82 PathProgramCache]: Analyzing trace with hash 157146607, now seen corresponding path program 3 times [2020-10-27 20:02:40,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:40,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114694779] [2020-10-27 20:02:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:40,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:41,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:41,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:02:41,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-27 20:02:41,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:02:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:02:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:42,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:42,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:42,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:42,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:42,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:42,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:02:42,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:42,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:02:42,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114694779] [2020-10-27 20:02:42,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:42,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:02:42,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822332955] [2020-10-27 20:02:42,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:02:42,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:42,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:02:42,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:02:42,108 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 22 states. [2020-10-27 20:02:43,035 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-10-27 20:02:43,231 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-27 20:02:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:44,951 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2020-10-27 20:02:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:02:44,951 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-27 20:02:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:44,952 INFO L225 Difference]: With dead ends: 140 [2020-10-27 20:02:44,952 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 20:02:44,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=238, Invalid=1654, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:02:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 20:02:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-10-27 20:02:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 20:02:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2020-10-27 20:02:44,972 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 53 [2020-10-27 20:02:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:44,972 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2020-10-27 20:02:44,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:02:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2020-10-27 20:02:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:02:44,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:44,973 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:44,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:02:44,973 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:44,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1800477749, now seen corresponding path program 5 times [2020-10-27 20:02:44,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:44,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210051203] [2020-10-27 20:02:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:45,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2336 [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:02:47,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:47,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:47,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:47,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 20:02:47,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210051203] [2020-10-27 20:02:47,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:47,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:02:47,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254319399] [2020-10-27 20:02:47,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:02:47,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:02:47,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:02:47,714 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand 13 states. [2020-10-27 20:02:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:48,820 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2020-10-27 20:02:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:02:48,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-27 20:02:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:48,823 INFO L225 Difference]: With dead ends: 146 [2020-10-27 20:02:48,823 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 20:02:48,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:02:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 20:02:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 120. [2020-10-27 20:02:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 20:02:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2020-10-27 20:02:48,840 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 53 [2020-10-27 20:02:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:48,840 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2020-10-27 20:02:48,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:02:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2020-10-27 20:02:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:02:48,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:48,841 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:48,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:02:48,841 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash -839133438, now seen corresponding path program 7 times [2020-10-27 20:02:48,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:48,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294821827] [2020-10-27 20:02:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:48,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:49,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:49,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:02:49,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:49,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-27 20:02:49,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:49,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:02:49,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:49,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:02:49,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:50,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:50,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:50,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:50,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:50,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:50,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:50,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:50,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:50,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:50,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:02:50,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294821827] [2020-10-27 20:02:50,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:50,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:02:50,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008674098] [2020-10-27 20:02:50,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:02:50,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:50,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:02:50,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:02:50,796 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand 20 states. [2020-10-27 20:02:51,078 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-27 20:02:51,237 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 20:02:51,792 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-27 20:02:52,103 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-10-27 20:02:52,521 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 20:02:52,783 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-27 20:02:53,012 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-27 20:02:53,269 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 20:02:53,443 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 20:02:53,688 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-27 20:02:54,152 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-27 20:02:54,383 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 20:02:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:54,665 INFO L93 Difference]: Finished difference Result 137 states and 158 transitions. [2020-10-27 20:02:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:02:54,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-27 20:02:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:54,667 INFO L225 Difference]: With dead ends: 137 [2020-10-27 20:02:54,667 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:02:54,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:02:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:02:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-27 20:02:54,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 20:02:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-10-27 20:02:54,681 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 53 [2020-10-27 20:02:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:54,681 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-10-27 20:02:54,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:02:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-10-27 20:02:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:02:54,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:54,682 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:54,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:02:54,683 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:54,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:54,683 INFO L82 PathProgramCache]: Analyzing trace with hash 458110491, now seen corresponding path program 8 times [2020-10-27 20:02:54,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:54,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277670778] [2020-10-27 20:02:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:54,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:55,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1386 [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:02:56,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:56,458 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 20:02:56,613 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-27 20:02:56,787 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-27 20:02:56,964 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-27 20:02:57,196 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-27 20:02:58,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:58,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:58,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:58,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:58,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:02:58,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:58,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:58,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:58,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:58,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277670778] [2020-10-27 20:02:58,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:58,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:02:58,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385674113] [2020-10-27 20:02:58,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:02:58,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:58,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:02:58,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:02:58,096 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 24 states. [2020-10-27 20:02:58,795 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 20:02:59,194 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-27 20:02:59,436 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-27 20:02:59,742 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-27 20:03:00,124 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 20:03:00,328 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 20:03:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:01,635 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2020-10-27 20:03:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:03:01,636 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-27 20:03:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:01,637 INFO L225 Difference]: With dead ends: 133 [2020-10-27 20:03:01,637 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:03:01,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:03:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:03:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2020-10-27 20:03:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 20:03:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2020-10-27 20:03:01,652 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 53 [2020-10-27 20:03:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:01,653 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2020-10-27 20:03:01,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:03:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2020-10-27 20:03:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:03:01,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:01,654 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:01,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:03:01,654 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:01,654 INFO L82 PathProgramCache]: Analyzing trace with hash 535492016, now seen corresponding path program 4 times [2020-10-27 20:03:01,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:01,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818712391] [2020-10-27 20:03:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:01,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:02,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:04,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:04,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:03:04,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:03:04,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-27 20:03:04,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:03:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:03:04,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:05,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:05,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:05,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:05,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:05,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:03:05,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:05,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:05,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818712391] [2020-10-27 20:03:05,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:05,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:03:05,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948191320] [2020-10-27 20:03:05,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:03:05,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:03:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:03:05,752 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 25 states. [2020-10-27 20:03:06,956 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-27 20:03:07,235 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2020-10-27 20:03:07,456 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 53 [2020-10-27 20:03:07,696 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 50 [2020-10-27 20:03:07,976 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 52 [2020-10-27 20:03:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:09,449 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2020-10-27 20:03:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:03:09,449 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-27 20:03:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:09,450 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:03:09,450 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:03:09,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=272, Invalid=2080, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:03:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:03:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-27 20:03:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:03:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-27 20:03:09,464 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 55 [2020-10-27 20:03:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:09,465 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-27 20:03:09,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:03:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-27 20:03:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:03:09,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:09,465 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:09,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:03:09,466 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:09,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2116144138, now seen corresponding path program 6 times [2020-10-27 20:03:09,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:09,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257986781] [2020-10-27 20:03:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:09,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:09,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:12,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:12,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:03:12,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:03:12,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2703 [2020-10-27 20:03:12,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:12,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:03:12,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:12,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:03:12,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:12,553 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-27 20:03:12,739 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-27 20:03:12,894 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-27 20:03:13,057 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-27 20:03:13,226 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-27 20:03:13,610 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-27 20:03:13,769 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-27 20:03:14,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:14,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:14,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:14,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:14,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:03:14,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:14,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:03:14,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257986781] [2020-10-27 20:03:14,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:14,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:03:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736848356] [2020-10-27 20:03:14,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:03:14,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:14,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:03:14,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:03:14,224 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 23 states. [2020-10-27 20:03:14,501 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-27 20:03:15,153 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-27 20:03:15,395 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-10-27 20:03:15,831 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-27 20:03:16,407 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2020-10-27 20:03:16,616 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-27 20:03:16,825 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 20:03:17,260 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-27 20:03:17,448 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 20:03:17,874 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-27 20:03:18,058 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 20:03:18,280 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 20:03:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:18,719 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-27 20:03:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:03:18,720 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-27 20:03:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:18,721 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:03:18,721 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:03:18,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:03:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:03:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2020-10-27 20:03:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:03:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-27 20:03:18,739 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 55 [2020-10-27 20:03:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:18,739 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-27 20:03:18,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:03:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-27 20:03:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:03:18,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:18,740 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:18,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:03:18,741 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:18,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1861152298, now seen corresponding path program 9 times [2020-10-27 20:03:18,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:18,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109940781] [2020-10-27 20:03:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:18,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:20,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:20,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:03:20,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:20,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-27 20:03:20,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:20,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:03:20,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:20,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:03:20,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:20,575 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-27 20:03:21,090 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 20:03:22,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:22,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:22,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:22,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:22,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:22,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:03:22,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:22,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:22,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:22,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:22,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:22,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109940781] [2020-10-27 20:03:22,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:22,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:03:22,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743160270] [2020-10-27 20:03:22,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:03:22,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:22,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:03:22,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:03:22,155 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 26 states. [2020-10-27 20:03:22,877 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 20:03:23,078 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-27 20:03:23,316 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-27 20:03:23,604 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 20:03:23,946 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-27 20:03:24,341 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 20:03:24,716 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-27 20:03:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:25,902 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2020-10-27 20:03:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:03:25,903 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-27 20:03:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:25,905 INFO L225 Difference]: With dead ends: 117 [2020-10-27 20:03:25,905 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:03:25,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=248, Invalid=2008, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:03:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:03:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2020-10-27 20:03:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 20:03:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2020-10-27 20:03:25,920 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 56 [2020-10-27 20:03:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:25,921 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2020-10-27 20:03:25,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:03:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2020-10-27 20:03:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:03:25,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:25,922 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:25,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:03:25,922 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:25,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1643658271, now seen corresponding path program 10 times [2020-10-27 20:03:25,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:25,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063469546] [2020-10-27 20:03:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:25,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:26,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:27,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:27,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:03:27,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:03:27,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-10-27 20:03:27,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:27,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:03:27,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:27,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:03:27,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:28,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:28,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:28,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:28,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:28,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:03:28,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:28,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 20:03:28,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063469546] [2020-10-27 20:03:28,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:28,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:03:28,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033601919] [2020-10-27 20:03:28,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:03:28,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:03:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:03:28,808 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand 21 states. [2020-10-27 20:03:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:30,451 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2020-10-27 20:03:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:03:30,452 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-10-27 20:03:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:30,454 INFO L225 Difference]: With dead ends: 107 [2020-10-27 20:03:30,454 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:03:30,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:03:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:03:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-27 20:03:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 20:03:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2020-10-27 20:03:30,470 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 56 [2020-10-27 20:03:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:30,470 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2020-10-27 20:03:30,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:03:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2020-10-27 20:03:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:03:30,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:30,471 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:30,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:03:30,471 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:30,472 INFO L82 PathProgramCache]: Analyzing trace with hash 811978411, now seen corresponding path program 5 times [2020-10-27 20:03:30,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:30,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116110074] [2020-10-27 20:03:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:30,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:31,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:32,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:32,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:03:32,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:03:32,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2362 [2020-10-27 20:03:32,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:03:32,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:32,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:03:32,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:33,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:33,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:33,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:33,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:33,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:03:33,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:33,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:03:33,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116110074] [2020-10-27 20:03:33,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:33,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:03:33,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677684063] [2020-10-27 20:03:33,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:03:33,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:33,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:03:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:03:33,774 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand 21 states. [2020-10-27 20:03:34,139 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 20:03:34,545 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-27 20:03:34,777 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-27 20:03:34,961 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-27 20:03:35,850 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 20:03:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:36,698 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2020-10-27 20:03:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:03:36,699 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-10-27 20:03:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:36,700 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:03:36,701 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:03:36,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:03:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:03:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2020-10-27 20:03:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:03:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-10-27 20:03:36,718 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 58 [2020-10-27 20:03:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:36,718 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-10-27 20:03:36,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:03:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2020-10-27 20:03:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:03:36,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:36,719 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:36,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:03:36,720 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1839657743, now seen corresponding path program 7 times [2020-10-27 20:03:36,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:36,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686646308] [2020-10-27 20:03:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:36,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:38,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:38,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:03:38,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:38,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1876 [2020-10-27 20:03:38,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:38,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:03:38,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:38,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:03:38,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:39,135 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-27 20:03:39,264 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-27 20:03:39,478 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-27 20:03:39,621 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-27 20:03:39,783 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 20:03:39,942 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-27 20:03:40,210 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-27 20:03:40,406 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-27 20:03:41,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:41,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:41,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:41,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:41,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:41,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:03:41,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:41,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:41,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:41,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:41,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:41,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686646308] [2020-10-27 20:03:41,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:41,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:03:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236558605] [2020-10-27 20:03:41,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:03:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:03:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:03:41,424 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 27 states. [2020-10-27 20:03:41,737 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-27 20:03:42,391 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-10-27 20:03:42,739 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2020-10-27 20:03:43,038 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-27 20:03:43,585 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 20:03:43,791 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-27 20:03:44,273 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 20:03:44,507 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 20:03:44,986 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-27 20:03:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:45,911 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2020-10-27 20:03:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:03:45,912 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-27 20:03:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:45,913 INFO L225 Difference]: With dead ends: 123 [2020-10-27 20:03:45,913 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:03:45,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:03:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:03:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2020-10-27 20:03:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 20:03:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2020-10-27 20:03:45,932 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 58 [2020-10-27 20:03:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:45,932 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2020-10-27 20:03:45,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:03:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2020-10-27 20:03:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:03:45,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:45,934 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:45,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:03:45,934 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1734900281, now seen corresponding path program 11 times [2020-10-27 20:03:45,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:45,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032054833] [2020-10-27 20:03:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:46,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:47,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:47,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:03:47,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:47,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1310 [2020-10-27 20:03:47,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:47,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:03:47,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:47,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:03:47,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:47,702 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 20:03:47,894 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-27 20:03:48,060 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-27 20:03:48,243 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-27 20:03:48,374 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-27 20:03:48,796 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-27 20:03:49,100 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-27 20:03:49,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:49,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:49,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:49,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:49,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:03:49,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:49,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:49,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:49,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:49,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:49,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032054833] [2020-10-27 20:03:49,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:49,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:03:49,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130007082] [2020-10-27 20:03:49,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:03:49,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:03:49,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:03:49,735 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand 24 states. [2020-10-27 20:03:50,009 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 20:03:50,578 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 20:03:50,811 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-27 20:03:51,208 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-27 20:03:51,752 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-27 20:03:52,237 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-27 20:03:52,542 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-27 20:03:52,769 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-27 20:03:53,280 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-27 20:03:53,446 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 20:03:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:54,187 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2020-10-27 20:03:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:03:54,188 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-27 20:03:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:54,190 INFO L225 Difference]: With dead ends: 127 [2020-10-27 20:03:54,190 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:03:54,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:03:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:03:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-10-27 20:03:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 20:03:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2020-10-27 20:03:54,213 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 59 [2020-10-27 20:03:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:54,213 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2020-10-27 20:03:54,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:03:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2020-10-27 20:03:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:03:54,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:54,214 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:54,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:03:54,214 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1403371696, now seen corresponding path program 12 times [2020-10-27 20:03:54,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:54,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495538248] [2020-10-27 20:03:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:54,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:55,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:56,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:56,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:03:56,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:03:56,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1916 [2020-10-27 20:03:56,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:56,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:03:56,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:56,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 20:03:56,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:56,657 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-27 20:03:57,031 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-27 20:03:57,171 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 20:03:57,371 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-27 20:03:57,625 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 20:03:57,795 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 20:03:58,140 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-27 20:03:58,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:58,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:58,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:58,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:58,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:58,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:03:58,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:58,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495538248] [2020-10-27 20:03:58,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:58,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:03:58,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066014433] [2020-10-27 20:03:58,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:03:58,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:03:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:03:58,878 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 27 states. [2020-10-27 20:03:59,837 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 52 [2020-10-27 20:04:00,187 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 61 [2020-10-27 20:04:00,481 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-27 20:04:00,906 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 81 [2020-10-27 20:04:01,246 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-27 20:04:01,722 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 64 [2020-10-27 20:04:02,174 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-27 20:04:02,813 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-27 20:04:03,146 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-27 20:04:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:03,849 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2020-10-27 20:04:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:04:03,853 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-27 20:04:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:03,854 INFO L225 Difference]: With dead ends: 143 [2020-10-27 20:04:03,854 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 20:04:03,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:04:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 20:04:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 128. [2020-10-27 20:04:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 20:04:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2020-10-27 20:04:03,878 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 59 [2020-10-27 20:04:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:03,878 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2020-10-27 20:04:03,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:04:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2020-10-27 20:04:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:04:03,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:03,879 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:03,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:04:03,880 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:03,880 INFO L82 PathProgramCache]: Analyzing trace with hash -6590714, now seen corresponding path program 4 times [2020-10-27 20:04:03,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:03,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782710292] [2020-10-27 20:04:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:03,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:04,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:07,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:04:07,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:07,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3564 [2020-10-27 20:04:07,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:07,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:04:07,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:07,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 20:04:07,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:08,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:08,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:08,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:08,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:08,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:04:08,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:04:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782710292] [2020-10-27 20:04:08,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:08,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:04:08,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160658997] [2020-10-27 20:04:08,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:04:08,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:08,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:04:08,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:04:08,243 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand 22 states. [2020-10-27 20:04:10,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:10,010 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2020-10-27 20:04:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:04:10,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-27 20:04:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:10,012 INFO L225 Difference]: With dead ends: 149 [2020-10-27 20:04:10,012 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 20:04:10,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:04:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 20:04:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2020-10-27 20:04:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 20:04:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2020-10-27 20:04:10,038 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 60 [2020-10-27 20:04:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:10,038 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2020-10-27 20:04:10,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:04:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2020-10-27 20:04:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:04:10,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:10,039 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:10,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:04:10,040 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:10,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1636740428, now seen corresponding path program 8 times [2020-10-27 20:04:10,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:10,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723463625] [2020-10-27 20:04:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:12,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:12,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:04:12,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:12,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2595 [2020-10-27 20:04:12,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:12,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:04:12,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:12,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 20:04:12,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:13,263 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-27 20:04:13,465 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-27 20:04:13,596 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-27 20:04:13,770 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-27 20:04:13,909 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-27 20:04:14,200 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-27 20:04:14,369 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-27 20:04:14,592 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 40 [2020-10-27 20:04:14,829 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-27 20:04:15,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:15,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:15,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:15,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:15,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:15,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:15,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:15,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:15,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:15,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:15,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723463625] [2020-10-27 20:04:15,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:15,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:04:15,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790255468] [2020-10-27 20:04:15,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:04:15,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:15,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:04:15,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:04:15,508 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand 26 states. [2020-10-27 20:04:15,909 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-27 20:04:16,110 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-27 20:04:16,689 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2020-10-27 20:04:17,067 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-10-27 20:04:17,395 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-27 20:04:17,840 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 20:04:18,475 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 116 [2020-10-27 20:04:18,750 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-27 20:04:19,190 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-27 20:04:19,515 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-27 20:04:19,961 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-10-27 20:04:20,315 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-27 20:04:20,984 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-10-27 20:04:21,270 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-10-27 20:04:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:22,498 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2020-10-27 20:04:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:04:22,499 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-27 20:04:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:22,500 INFO L225 Difference]: With dead ends: 145 [2020-10-27 20:04:22,500 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 20:04:22,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:04:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 20:04:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2020-10-27 20:04:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 20:04:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-10-27 20:04:22,521 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 60 [2020-10-27 20:04:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:22,521 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-10-27 20:04:22,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:04:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-10-27 20:04:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:04:22,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:22,522 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:22,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:04:22,522 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash 836587, now seen corresponding path program 9 times [2020-10-27 20:04:22,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:22,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660293755] [2020-10-27 20:04:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:22,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:23,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:26,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:26,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:04:26,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:26,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4144 [2020-10-27 20:04:26,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:26,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:04:26,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:26,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:04:26,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:27,151 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-27 20:04:27,271 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-27 20:04:27,464 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-27 20:04:27,604 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-27 20:04:27,876 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-27 20:04:28,179 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-27 20:04:28,381 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 20:04:28,517 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-27 20:04:28,685 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 20:04:28,833 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-27 20:04:29,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:29,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:29,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:29,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:29,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:29,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:29,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:29,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:29,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:29,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:04:29,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660293755] [2020-10-27 20:04:29,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:29,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:04:29,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144247553] [2020-10-27 20:04:29,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:04:29,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:29,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:04:29,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:04:29,701 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 26 states.