/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-ext2-properties/simple_and_skiplist_2lvl-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:56:21,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:56:21,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:56:22,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:56:22,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:56:22,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:56:22,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:56:22,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:56:22,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:56:22,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:56:22,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:56:22,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:56:22,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:56:22,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:56:22,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:56:22,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:56:22,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:56:22,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:56:22,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:56:22,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:56:22,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:56:22,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:56:22,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:56:22,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:56:22,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:56:22,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:56:22,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:56:22,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:56:22,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:56:22,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:56:22,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:56:22,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:56:22,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:56:22,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:56:22,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:56:22,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:56:22,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:56:22,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:56:22,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:56:22,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:56:22,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:56:22,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:56:22,213 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:56:22,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:56:22,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:56:22,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:56:22,218 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:56:22,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:56:22,219 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:56:22,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:56:22,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:56:22,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:56:22,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:56:22,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:56:22,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:56:22,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:56:22,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:56:22,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:56:22,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:56:22,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:56:22,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:56:22,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:56:22,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:56:22,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:56:22,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:56:22,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:56:22,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:56:22,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:56:22,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:56:22,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:56:22,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:56:22,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:56:22,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:56:22,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:56:22,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:56:22,641 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:56:22,642 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:56:22,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-27 19:56:22,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e31c4ddd/e4f841a9e9794eeb9470171943e0bb4e/FLAGf5217d89d [2020-10-27 19:56:23,356 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:56:23,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-27 19:56:23,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e31c4ddd/e4f841a9e9794eeb9470171943e0bb4e/FLAGf5217d89d [2020-10-27 19:56:23,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e31c4ddd/e4f841a9e9794eeb9470171943e0bb4e [2020-10-27 19:56:23,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:56:23,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:56:23,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:56:23,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:56:23,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:56:23,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:56:23" (1/1) ... [2020-10-27 19:56:23,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b72999c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:23, skipping insertion in model container [2020-10-27 19:56:23,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:56:23" (1/1) ... [2020-10-27 19:56:23,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:56:23,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:56:24,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:56:24,167 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:56:24,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:56:24,336 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:56:24,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24 WrapperNode [2020-10-27 19:56:24,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:56:24,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:56:24,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:56:24,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:56:24,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (1/1) ... [2020-10-27 19:56:24,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (1/1) ... [2020-10-27 19:56:24,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (1/1) ... [2020-10-27 19:56:24,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (1/1) ... [2020-10-27 19:56:24,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (1/1) ... [2020-10-27 19:56:24,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (1/1) ... [2020-10-27 19:56:24,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (1/1) ... [2020-10-27 19:56:24,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:56:24,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:56:24,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:56:24,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:56:24,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:56:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:56:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:56:24,587 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:56:24,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 19:56:24,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 19:56:24,588 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 19:56:24,588 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-10-27 19:56:24,588 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-10-27 19:56:24,589 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-10-27 19:56:24,589 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-10-27 19:56:24,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:56:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:56:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:56:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:56:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:56:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:56:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:56:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:56:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:56:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:56:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:56:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:56:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:56:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:56:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:56:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:56:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:56:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:56:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:56:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:56:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:56:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:56:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:56:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:56:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 19:56:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 19:56:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:56:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:56:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:56:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:56:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:56:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:56:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:56:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:56:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:56:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:56:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:56:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:56:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:56:24,597 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:56:24,597 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:56:24,597 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:56:24,597 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:56:24,598 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:56:24,598 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:56:24,599 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:56:24,599 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:56:24,599 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:56:24,599 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:56:24,600 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:56:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:56:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:56:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:56:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:56:24,601 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:56:24,602 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:56:24,602 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:56:24,602 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:56:24,602 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:56:24,602 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:56:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:56:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:56:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:56:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:56:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:56:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:56:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:56:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:56:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:56:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:56:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:56:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:56:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:56:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:56:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:56:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:56:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:56:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:56:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:56:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:56:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:56:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:56:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:56:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:56:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:56:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:56:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:56:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:56:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:56:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:56:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:56:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:56:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:56:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:56:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:56:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:56:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:56:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:56:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:56:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:56:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:56:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:56:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:56:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:56:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:56:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:56:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:56:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:56:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:56:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:56:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:56:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:56:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 19:56:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-10-27 19:56:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:56:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-10-27 19:56:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:56:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:56:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-10-27 19:56:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-10-27 19:56:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:56:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:56:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:56:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:56:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:56:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:56:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:56:25,080 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 19:56:25,434 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:56:25,434 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 19:56:25,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:56:25 BoogieIcfgContainer [2020-10-27 19:56:25,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:56:25,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:56:25,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:56:25,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:56:25,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:56:23" (1/3) ... [2020-10-27 19:56:25,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb772a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:56:25, skipping insertion in model container [2020-10-27 19:56:25,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:24" (2/3) ... [2020-10-27 19:56:25,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb772a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:56:25, skipping insertion in model container [2020-10-27 19:56:25,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:56:25" (3/3) ... [2020-10-27 19:56:25,446 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2020-10-27 19:56:25,459 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:56:25,464 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:56:25,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:56:25,508 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:56:25,508 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:56:25,509 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:56:25,509 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:56:25,509 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:56:25,509 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:56:25,509 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:56:25,509 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:56:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-27 19:56:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 19:56:25,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:25,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:25,537 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:25,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1562599215, now seen corresponding path program 1 times [2020-10-27 19:56:25,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:25,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582266104] [2020-10-27 19:56:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:25,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:25,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:26,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:26,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:56:26,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:56:26,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-27 19:56:26,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:56:26,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:26,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:56:26,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:26,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:26,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:26,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:26,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:56:26,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:26,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:26,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:26,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582266104] [2020-10-27 19:56:26,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:26,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:56:26,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736772842] [2020-10-27 19:56:26,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:56:26,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:26,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:56:26,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:56:26,203 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-10-27 19:56:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:26,405 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-10-27 19:56:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:56:26,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 19:56:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:26,415 INFO L225 Difference]: With dead ends: 102 [2020-10-27 19:56:26,415 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 19:56:26,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:56:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 19:56:26,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 19:56:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 19:56:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 19:56:26,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-27 19:56:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:26,457 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 19:56:26,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:56:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 19:56:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:56:26,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:26,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:26,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:56:26,459 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:26,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1021400540, now seen corresponding path program 1 times [2020-10-27 19:56:26,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:26,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682174190] [2020-10-27 19:56:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:26,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:26,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:26,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:56:26,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:26,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 19:56:26,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:26,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:56:26,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:26,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:56:26,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:26,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:26,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:26,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:26,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:26,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:56:26,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:26,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:26,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682174190] [2020-10-27 19:56:26,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:26,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:56:26,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461911520] [2020-10-27 19:56:26,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:56:26,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:26,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:56:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:56:26,690 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-27 19:56:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:26,848 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 19:56:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:56:26,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 19:56:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:26,851 INFO L225 Difference]: With dead ends: 36 [2020-10-27 19:56:26,851 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 19:56:26,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:56:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 19:56:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-10-27 19:56:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 19:56:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 19:56:26,861 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-27 19:56:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:26,861 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 19:56:26,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:56:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 19:56:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:56:26,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:26,862 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:26,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:56:26,863 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:26,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1745502243, now seen corresponding path program 1 times [2020-10-27 19:56:26,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:26,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044206737] [2020-10-27 19:56:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:26,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:26,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:26,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:56:26,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:26,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-27 19:56:26,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:56:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:56:26,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:27,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:27,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:27,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:27,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:56:27,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:27,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:27,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:27,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:27,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:27,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044206737] [2020-10-27 19:56:27,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:27,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:56:27,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859202133] [2020-10-27 19:56:27,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:56:27,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:56:27,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:56:27,076 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-27 19:56:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:27,170 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 19:56:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:56:27,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 19:56:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:27,171 INFO L225 Difference]: With dead ends: 40 [2020-10-27 19:56:27,171 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 19:56:27,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:56:27,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 19:56:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-10-27 19:56:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 19:56:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 19:56:27,177 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-27 19:56:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:27,178 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 19:56:27,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:56:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 19:56:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 19:56:27,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:27,179 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:27,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:56:27,179 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash -727649085, now seen corresponding path program 1 times [2020-10-27 19:56:27,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:27,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661029064] [2020-10-27 19:56:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:27,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:27,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 19:56:27,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:27,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 19:56:27,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:27,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:56:27,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:27,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:56:27,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:27,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:27,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:27,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:27,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:27,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:27,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:27,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661029064] [2020-10-27 19:56:27,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:27,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:56:27,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882298999] [2020-10-27 19:56:27,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:56:27,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:56:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:56:27,682 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-27 19:56:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:27,940 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 19:56:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:56:27,941 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-27 19:56:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:27,942 INFO L225 Difference]: With dead ends: 40 [2020-10-27 19:56:27,942 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 19:56:27,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:56:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 19:56:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-27 19:56:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 19:56:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 19:56:27,950 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2020-10-27 19:56:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:27,951 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 19:56:27,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:56:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 19:56:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:56:27,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:27,952 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] [2020-10-27 19:56:27,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:56:27,953 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:27,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1943608356, now seen corresponding path program 1 times [2020-10-27 19:56:27,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:27,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265534333] [2020-10-27 19:56:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:27,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:28,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:28,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:56:28,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:28,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 19:56:28,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:56:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:56:28,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:28,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:28,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:28,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:28,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:28,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:28,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:28,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:28,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:28,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:28,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:28,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:28,495 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 19:56:28,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265534333] [2020-10-27 19:56:28,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:28,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:56:28,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902391038] [2020-10-27 19:56:28,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:56:28,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:56:28,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:56:28,510 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-27 19:56:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:28,809 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-27 19:56:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:56:28,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-27 19:56:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:28,811 INFO L225 Difference]: With dead ends: 43 [2020-10-27 19:56:28,811 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 19:56:28,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:56:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 19:56:28,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-27 19:56:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 19:56:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-27 19:56:28,819 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-27 19:56:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:28,819 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-27 19:56:28,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:56:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-27 19:56:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 19:56:28,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:28,820 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:28,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:56:28,821 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash 874039338, now seen corresponding path program 2 times [2020-10-27 19:56:28,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:28,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407494194] [2020-10-27 19:56:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:28,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:29,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:29,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 19:56:29,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:29,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 19:56:29,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:56:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:56:29,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:29,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:29,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:29,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:29,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:29,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:29,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:29,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:29,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:29,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407494194] [2020-10-27 19:56:29,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:29,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:56:29,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588541283] [2020-10-27 19:56:29,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:56:29,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:29,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:56:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:56:29,262 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-27 19:56:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:29,688 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-27 19:56:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:56:29,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-27 19:56:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:29,691 INFO L225 Difference]: With dead ends: 50 [2020-10-27 19:56:29,691 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 19:56:29,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:56:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 19:56:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2020-10-27 19:56:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 19:56:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-27 19:56:29,701 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 24 [2020-10-27 19:56:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:29,701 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-27 19:56:29,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:56:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-27 19:56:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:56:29,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:29,703 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] [2020-10-27 19:56:29,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:56:29,703 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:29,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1462891043, now seen corresponding path program 2 times [2020-10-27 19:56:29,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:29,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512736304] [2020-10-27 19:56:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:29,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:29,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:29,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:56:29,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:29,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 19:56:29,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:56:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:56:29,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:30,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:30,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:30,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:30,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:30,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:30,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:30,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:30,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512736304] [2020-10-27 19:56:30,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:30,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:56:30,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866929279] [2020-10-27 19:56:30,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:56:30,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:56:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:56:30,094 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-10-27 19:56:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:30,362 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-27 19:56:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:56:30,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 19:56:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:30,363 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:56:30,363 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 19:56:30,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:56:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 19:56:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-27 19:56:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 19:56:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 19:56:30,371 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-27 19:56:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:30,371 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 19:56:30,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:56:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 19:56:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:56:30,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:30,372 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:30,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:56:30,373 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1164509973, now seen corresponding path program 3 times [2020-10-27 19:56:30,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:30,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949633406] [2020-10-27 19:56:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:30,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:30,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:30,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:56:30,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:30,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-27 19:56:30,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:56:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:56:30,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:31,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:31,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:31,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:31,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:31,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:31,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:56:31,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:31,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:31,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949633406] [2020-10-27 19:56:31,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:31,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:56:31,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135195745] [2020-10-27 19:56:31,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:56:31,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:31,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:56:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:56:31,069 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-27 19:56:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:31,513 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-27 19:56:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:56:31,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 19:56:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:31,515 INFO L225 Difference]: With dead ends: 47 [2020-10-27 19:56:31,515 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 19:56:31,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:56:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 19:56:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-10-27 19:56:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 19:56:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 19:56:31,523 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-27 19:56:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:31,523 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 19:56:31,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:56:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 19:56:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:56:31,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:31,525 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:31,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:56:31,525 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:31,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1558540271, now seen corresponding path program 3 times [2020-10-27 19:56:31,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:31,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324585952] [2020-10-27 19:56:31,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:31,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:31,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:31,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:56:31,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:31,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 19:56:31,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:56:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:56:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:32,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:32,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:32,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:32,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:32,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:32,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:56:32,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324585952] [2020-10-27 19:56:32,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:32,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:56:32,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669866919] [2020-10-27 19:56:32,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:56:32,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:56:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:56:32,033 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2020-10-27 19:56:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:32,204 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-27 19:56:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:56:32,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 19:56:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:32,206 INFO L225 Difference]: With dead ends: 43 [2020-10-27 19:56:32,206 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 19:56:32,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:56:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 19:56:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-27 19:56:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 19:56:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 19:56:32,213 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-10-27 19:56:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:32,213 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 19:56:32,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:56:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 19:56:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:56:32,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:32,214 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] [2020-10-27 19:56:32,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:56:32,215 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:32,215 INFO L82 PathProgramCache]: Analyzing trace with hash 216095818, now seen corresponding path program 4 times [2020-10-27 19:56:32,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:32,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506961534] [2020-10-27 19:56:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:32,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:32,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:32,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:56:32,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:32,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-27 19:56:32,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:56:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:56:32,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:33,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:33,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:33,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:33,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:33,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:33,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:33,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:33,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506961534] [2020-10-27 19:56:33,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:33,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:56:33,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599856590] [2020-10-27 19:56:33,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:56:33,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:33,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:56:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:56:33,091 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-10-27 19:56:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:33,755 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-27 19:56:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:56:33,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 19:56:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:33,763 INFO L225 Difference]: With dead ends: 49 [2020-10-27 19:56:33,763 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 19:56:33,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:56:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 19:56:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-27 19:56:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:56:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 19:56:33,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2020-10-27 19:56:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:33,772 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 19:56:33,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:56:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 19:56:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:56:33,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:33,773 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:33,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:56:33,773 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1168563662, now seen corresponding path program 5 times [2020-10-27 19:56:33,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:33,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962828550] [2020-10-27 19:56:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:33,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:34,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:34,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:56:34,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-27 19:56:34,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:34,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:56:34,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:56:34,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:34,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:34,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:34,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:34,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:34,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:34,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:34,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:34,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:34,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962828550] [2020-10-27 19:56:34,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:34,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:56:34,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799640220] [2020-10-27 19:56:34,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:56:34,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:34,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:56:34,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:56:34,779 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-27 19:56:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:35,522 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-27 19:56:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:56:35,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-27 19:56:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:35,523 INFO L225 Difference]: With dead ends: 59 [2020-10-27 19:56:35,524 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:56:35,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:56:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:56:35,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-27 19:56:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 19:56:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-27 19:56:35,532 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 31 [2020-10-27 19:56:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:35,533 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-27 19:56:35,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:56:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-27 19:56:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:56:35,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:35,534 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:35,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:56:35,534 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:35,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1695122699, now seen corresponding path program 6 times [2020-10-27 19:56:35,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:35,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087189079] [2020-10-27 19:56:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:35,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:35,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:35,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:56:35,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:35,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 19:56:35,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:35,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:56:35,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:56:35,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:56:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:36,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:36,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:36,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:36,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:36,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:36,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:36,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:36,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:36,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:36,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087189079] [2020-10-27 19:56:36,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:36,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:56:36,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068305482] [2020-10-27 19:56:36,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:56:36,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:36,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:56:36,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:56:36,179 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 13 states. [2020-10-27 19:56:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:36,635 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-27 19:56:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:56:36,636 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:56:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:36,636 INFO L225 Difference]: With dead ends: 61 [2020-10-27 19:56:36,637 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 19:56:36,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:56:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 19:56:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-27 19:56:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:56:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-27 19:56:36,645 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-10-27 19:56:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:36,645 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-27 19:56:36,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:56:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-27 19:56:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:56:36,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:36,646 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] [2020-10-27 19:56:36,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:56:36,646 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash 720460529, now seen corresponding path program 7 times [2020-10-27 19:56:36,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:36,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218770690] [2020-10-27 19:56:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:37,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:56:37,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:37,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-27 19:56:37,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:37,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:56:37,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:37,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:56:37,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:37,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:37,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:37,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:37,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:37,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:37,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:37,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:37,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218770690] [2020-10-27 19:56:37,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:37,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:56:37,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520876284] [2020-10-27 19:56:37,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:56:37,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:56:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:56:37,792 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 15 states. [2020-10-27 19:56:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:38,692 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-27 19:56:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:56:38,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 19:56:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:38,695 INFO L225 Difference]: With dead ends: 53 [2020-10-27 19:56:38,695 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 19:56:38,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:56:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 19:56:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-27 19:56:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 19:56:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 19:56:38,705 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 34 [2020-10-27 19:56:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:38,705 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 19:56:38,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:56:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 19:56:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:56:38,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:38,706 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:38,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:56:38,707 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash -375999481, now seen corresponding path program 8 times [2020-10-27 19:56:38,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:38,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204313885] [2020-10-27 19:56:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:38,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:39,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:56:39,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:39,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-27 19:56:39,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:39,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:56:39,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:39,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:56:39,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:39,883 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-27 19:56:40,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:40,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:40,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:40,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:40,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:40,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:40,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:40,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:40,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204313885] [2020-10-27 19:56:40,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:40,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:56:40,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317803483] [2020-10-27 19:56:40,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:56:40,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:56:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:56:40,296 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-27 19:56:40,836 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-27 19:56:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:41,624 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-27 19:56:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:56:41,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-27 19:56:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:41,626 INFO L225 Difference]: With dead ends: 63 [2020-10-27 19:56:41,626 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 19:56:41,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:56:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 19:56:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-27 19:56:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 19:56:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-27 19:56:41,642 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 35 [2020-10-27 19:56:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:41,642 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-27 19:56:41,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:56:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-27 19:56:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:56:41,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:41,647 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:41,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:56:41,648 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash 38381294, now seen corresponding path program 9 times [2020-10-27 19:56:41,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:41,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568405882] [2020-10-27 19:56:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:42,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:42,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:56:42,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-27 19:56:42,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:56:42,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:42,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:56:42,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:42,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:42,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:42,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:42,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:42,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:42,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:56:42,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:42,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568405882] [2020-10-27 19:56:42,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:42,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:56:42,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471483053] [2020-10-27 19:56:42,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:56:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:56:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:56:42,781 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 16 states. [2020-10-27 19:56:43,303 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-27 19:56:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:43,878 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-27 19:56:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:56:43,879 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 19:56:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:43,880 INFO L225 Difference]: With dead ends: 64 [2020-10-27 19:56:43,880 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 19:56:43,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:56:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 19:56:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2020-10-27 19:56:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 19:56:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-27 19:56:43,888 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 37 [2020-10-27 19:56:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:43,889 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-27 19:56:43,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:56:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-27 19:56:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:56:43,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:43,890 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:43,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:56:43,890 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:43,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1375490536, now seen corresponding path program 10 times [2020-10-27 19:56:43,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:43,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145652369] [2020-10-27 19:56:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:43,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:44,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:44,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:56:44,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:44,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-27 19:56:44,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:44,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:56:44,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:44,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:56:44,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:45,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:45,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:45,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:45,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:45,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:45,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:45,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:45,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:45,209 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 19:56:45,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145652369] [2020-10-27 19:56:45,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:45,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:56:45,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385704899] [2020-10-27 19:56:45,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:56:45,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:56:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:56:45,217 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 17 states. [2020-10-27 19:56:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:45,940 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-27 19:56:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:56:45,941 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 19:56:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:45,942 INFO L225 Difference]: With dead ends: 70 [2020-10-27 19:56:45,943 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 19:56:45,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:56:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 19:56:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-10-27 19:56:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 19:56:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-27 19:56:45,956 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 38 [2020-10-27 19:56:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:45,956 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-27 19:56:45,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:56:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-27 19:56:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:56:45,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:45,957 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:45,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:56:45,957 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash -925973056, now seen corresponding path program 11 times [2020-10-27 19:56:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:45,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831975110] [2020-10-27 19:56:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:46,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:46,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:56:46,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:46,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-27 19:56:46,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:46,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:56:46,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:46,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:56:46,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:47,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:47,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:47,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:47,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:47,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:47,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:47,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:47,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:56:47,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831975110] [2020-10-27 19:56:47,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:47,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:56:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091193825] [2020-10-27 19:56:47,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:56:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:56:47,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:56:47,158 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 17 states. [2020-10-27 19:56:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:47,471 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-27 19:56:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:56:47,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-27 19:56:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:47,472 INFO L225 Difference]: With dead ends: 66 [2020-10-27 19:56:47,473 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 19:56:47,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:56:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 19:56:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-10-27 19:56:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 19:56:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 19:56:47,482 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-10-27 19:56:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:47,482 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 19:56:47,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:56:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 19:56:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:56:47,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:47,483 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:47,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:56:47,484 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:47,484 INFO L82 PathProgramCache]: Analyzing trace with hash -293831215, now seen corresponding path program 12 times [2020-10-27 19:56:47,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:47,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180110821] [2020-10-27 19:56:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:47,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:47,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:47,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:56:47,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:47,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-27 19:56:47,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:56:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:56:47,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:48,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:48,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:48,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:48,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:48,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:56:48,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:48,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:48,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:48,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:48,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:48,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180110821] [2020-10-27 19:56:48,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:48,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:56:48,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488535665] [2020-10-27 19:56:48,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:56:48,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:48,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:56:48,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:56:48,807 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-27 19:56:49,118 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-27 19:56:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:49,591 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 19:56:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:56:49,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 19:56:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:49,592 INFO L225 Difference]: With dead ends: 65 [2020-10-27 19:56:49,592 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 19:56:49,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:56:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 19:56:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-27 19:56:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 19:56:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-27 19:56:49,607 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2020-10-27 19:56:49,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:49,607 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-27 19:56:49,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:56:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-27 19:56:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:56:49,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:49,608 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:49,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:56:49,608 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash -205246873, now seen corresponding path program 13 times [2020-10-27 19:56:49,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:49,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427062206] [2020-10-27 19:56:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:49,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:50,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:50,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:56:50,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:50,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-27 19:56:50,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:50,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:56:50,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:50,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:56:50,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:51,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:51,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:51,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:51,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:51,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:51,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:51,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:51,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:51,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:51,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:51,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:51,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427062206] [2020-10-27 19:56:51,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:51,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:56:51,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091837375] [2020-10-27 19:56:51,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:56:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:56:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:56:51,375 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 18 states. [2020-10-27 19:56:51,936 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-27 19:56:52,244 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-27 19:56:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:52,887 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 19:56:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:56:52,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-27 19:56:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:52,889 INFO L225 Difference]: With dead ends: 65 [2020-10-27 19:56:52,889 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 19:56:52,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:56:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 19:56:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-27 19:56:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 19:56:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-27 19:56:52,897 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2020-10-27 19:56:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:52,898 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-27 19:56:52,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:56:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-27 19:56:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:56:52,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:52,899 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:52,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:56:52,899 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:52,900 INFO L82 PathProgramCache]: Analyzing trace with hash 274175928, now seen corresponding path program 14 times [2020-10-27 19:56:52,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:52,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681000224] [2020-10-27 19:56:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:52,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:53,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:53,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:56:53,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:53,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-27 19:56:53,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:56:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:56:53,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:54,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:54,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:54,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:54,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:54,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:54,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:54,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:54,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:54,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681000224] [2020-10-27 19:56:54,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:54,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:56:54,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108587370] [2020-10-27 19:56:54,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:56:54,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:56:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:56:54,494 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 19 states. [2020-10-27 19:56:55,096 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-27 19:56:55,438 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-27 19:56:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:56,181 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-27 19:56:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:56:56,182 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-27 19:56:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:56,183 INFO L225 Difference]: With dead ends: 68 [2020-10-27 19:56:56,183 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 19:56:56,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:56:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 19:56:56,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-27 19:56:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 19:56:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 19:56:56,193 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 44 [2020-10-27 19:56:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:56,193 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 19:56:56,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:56:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 19:56:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:56:56,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:56,194 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:56,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:56:56,194 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash 223105376, now seen corresponding path program 15 times [2020-10-27 19:56:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:56,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086731444] [2020-10-27 19:56:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:56,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:57,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:57,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:56:57,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:57,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-27 19:56:57,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 19:56:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:56:57,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:56:57,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:57,728 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-27 19:56:58,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:58,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:58,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:58,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:58,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:58,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:58,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:58,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:58,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:58,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:58,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:58,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086731444] [2020-10-27 19:56:58,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:58,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 19:56:58,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146952913] [2020-10-27 19:56:58,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 19:56:58,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:58,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 19:56:58,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:56:58,402 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 20 states. [2020-10-27 19:56:58,918 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 19:56:59,131 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 19:56:59,361 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-27 19:56:59,770 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 19:57:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:00,061 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-27 19:57:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:57:00,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-27 19:57:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:00,062 INFO L225 Difference]: With dead ends: 82 [2020-10-27 19:57:00,062 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 19:57:00,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:57:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 19:57:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-27 19:57:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 19:57:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-27 19:57:00,075 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 45 [2020-10-27 19:57:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:00,076 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-27 19:57:00,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 19:57:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-27 19:57:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:57:00,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:00,076 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:00,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:57:00,077 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1992581319, now seen corresponding path program 16 times [2020-10-27 19:57:00,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:00,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526350088] [2020-10-27 19:57:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:00,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:00,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:57:00,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:00,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-27 19:57:00,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:00,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:57:00,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:00,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:57:00,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:02,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:02,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:02,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:02,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:02,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:02,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:02,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:02,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526350088] [2020-10-27 19:57:02,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:02,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:57:02,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142644615] [2020-10-27 19:57:02,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:57:02,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:57:02,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:57:02,159 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 19 states. [2020-10-27 19:57:02,738 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-27 19:57:03,053 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-27 19:57:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:03,760 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-27 19:57:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:57:03,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-27 19:57:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:03,765 INFO L225 Difference]: With dead ends: 81 [2020-10-27 19:57:03,765 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:57:03,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:57:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:57:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-27 19:57:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 19:57:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-27 19:57:03,774 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-27 19:57:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:03,775 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-27 19:57:03,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:57:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-27 19:57:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:57:03,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:03,775 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:03,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:57:03,776 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:03,776 INFO L82 PathProgramCache]: Analyzing trace with hash 968189471, now seen corresponding path program 17 times [2020-10-27 19:57:03,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:03,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302039003] [2020-10-27 19:57:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:03,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:04,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:04,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:57:04,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:04,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-27 19:57:04,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:04,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:57:04,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:04,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 19:57:04,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:05,386 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 19:57:05,651 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 19:57:06,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:06,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:06,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:06,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:06,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:06,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:57:06,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:06,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:06,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302039003] [2020-10-27 19:57:06,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:06,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:57:06,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039955117] [2020-10-27 19:57:06,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:57:06,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:57:06,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:57:06,239 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2020-10-27 19:57:06,911 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-27 19:57:07,348 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-27 19:57:08,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:08,127 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-27 19:57:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:57:08,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-27 19:57:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:08,130 INFO L225 Difference]: With dead ends: 72 [2020-10-27 19:57:08,130 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 19:57:08,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:57:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 19:57:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-27 19:57:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:57:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 19:57:08,139 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 48 [2020-10-27 19:57:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:08,140 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 19:57:08,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:57:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 19:57:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:57:08,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:08,140 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:08,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:57:08,141 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:08,141 INFO L82 PathProgramCache]: Analyzing trace with hash 262688729, now seen corresponding path program 18 times [2020-10-27 19:57:08,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:08,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616680619] [2020-10-27 19:57:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:09,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:09,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:57:09,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:09,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-27 19:57:09,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:57:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:57:09,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:09,888 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-27 19:57:10,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:10,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:10,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:10,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:10,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:10,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:10,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:10,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:10,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:10,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:10,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:10,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616680619] [2020-10-27 19:57:10,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:10,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 19:57:10,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479585989] [2020-10-27 19:57:10,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 19:57:10,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 19:57:10,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:57:10,570 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-27 19:57:11,238 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-27 19:57:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:11,700 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-27 19:57:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:57:11,700 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-27 19:57:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:11,702 INFO L225 Difference]: With dead ends: 73 [2020-10-27 19:57:11,702 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 19:57:11,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:57:11,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 19:57:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-27 19:57:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:57:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 19:57:11,710 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 49 [2020-10-27 19:57:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:11,710 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 19:57:11,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 19:57:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 19:57:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:57:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:11,711 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:11,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:57:11,711 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1377477888, now seen corresponding path program 19 times [2020-10-27 19:57:11,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:11,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695985367] [2020-10-27 19:57:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:11,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:57:12,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:13,444 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-27 19:57:13,751 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-27 19:57:14,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:14,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:14,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:14,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:14,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:14,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:14,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:14,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:14,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695985367] [2020-10-27 19:57:14,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:14,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 19:57:14,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256637972] [2020-10-27 19:57:14,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 19:57:14,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:14,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 19:57:14,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:57:14,244 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-27 19:57:14,960 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-27 19:57:15,386 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-27 19:57:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:16,301 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-27 19:57:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:57:16,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 19:57:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:16,303 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:57:16,303 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 19:57:16,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:57:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 19:57:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-10-27 19:57:16,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 19:57:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-27 19:57:16,314 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2020-10-27 19:57:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:16,315 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-27 19:57:16,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 19:57:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-27 19:57:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:57:16,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:16,316 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:16,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:57:16,316 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:16,316 INFO L82 PathProgramCache]: Analyzing trace with hash -920147706, now seen corresponding path program 20 times [2020-10-27 19:57:16,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:16,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585775733] [2020-10-27 19:57:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:16,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:17,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:17,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:57:17,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:17,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-27 19:57:17,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:17,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 19:57:17,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:17,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 19:57:17,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:17,985 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-27 19:57:18,215 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-27 19:57:18,338 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 19:57:18,489 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-27 19:57:18,715 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-27 19:57:19,045 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-27 19:57:19,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:19,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:19,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:19,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:19,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:19,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:19,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:19,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:19,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:19,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:19,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:19,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585775733] [2020-10-27 19:57:19,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:19,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 19:57:19,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491785096] [2020-10-27 19:57:19,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 19:57:19,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:19,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 19:57:19,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:57:19,686 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 23 states. [2020-10-27 19:57:20,328 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 19:57:20,690 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 19:57:21,118 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-27 19:57:21,518 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-27 19:57:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:22,403 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-27 19:57:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:57:22,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-27 19:57:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:22,405 INFO L225 Difference]: With dead ends: 95 [2020-10-27 19:57:22,405 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 19:57:22,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:57:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 19:57:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2020-10-27 19:57:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 19:57:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-27 19:57:22,416 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 52 [2020-10-27 19:57:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:22,416 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-27 19:57:22,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 19:57:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-27 19:57:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 19:57:22,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:22,417 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:22,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:57:22,417 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1076555391, now seen corresponding path program 21 times [2020-10-27 19:57:22,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:22,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083158764] [2020-10-27 19:57:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:22,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:23,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:23,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 19:57:23,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:23,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-27 19:57:23,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:23,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:57:23,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:23,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 19:57:23,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:23,986 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 19:57:24,251 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 19:57:24,396 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 19:57:24,544 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 19:57:24,688 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 19:57:25,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:25,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:25,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:25,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:25,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:25,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:25,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:25,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:25,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:25,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:25,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:25,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083158764] [2020-10-27 19:57:25,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:25,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 19:57:25,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152433361] [2020-10-27 19:57:25,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 19:57:25,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 19:57:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:57:25,324 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 22 states. [2020-10-27 19:57:25,960 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-27 19:57:26,363 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-27 19:57:26,558 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 19:57:26,828 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2020-10-27 19:57:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:27,758 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-10-27 19:57:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:57:27,759 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-27 19:57:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:27,760 INFO L225 Difference]: With dead ends: 91 [2020-10-27 19:57:27,760 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 19:57:27,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:57:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 19:57:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-27 19:57:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 19:57:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 19:57:27,770 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 54 [2020-10-27 19:57:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:27,771 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 19:57:27,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 19:57:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 19:57:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 19:57:27,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:27,771 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:27,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:57:27,772 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1406280889, now seen corresponding path program 22 times [2020-10-27 19:57:27,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:27,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275159637] [2020-10-27 19:57:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:27,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:29,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:29,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 19:57:29,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:29,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1243 [2020-10-27 19:57:29,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 19:57:29,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:29,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 19:57:29,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:29,481 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-27 19:57:29,699 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-27 19:57:30,004 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-27 19:57:30,144 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 19:57:30,445 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-27 19:57:30,623 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-27 19:57:30,818 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 19:57:31,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:31,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:31,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:31,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:31,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:31,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:31,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275159637] [2020-10-27 19:57:31,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:31,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 19:57:31,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739444607] [2020-10-27 19:57:31,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 19:57:31,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:31,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 19:57:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:57:31,501 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 24 states. [2020-10-27 19:57:32,121 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 19:57:32,467 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 19:57:32,864 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 19:57:33,067 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 19:57:33,392 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-27 19:57:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:34,319 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-27 19:57:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:57:34,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 19:57:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:34,321 INFO L225 Difference]: With dead ends: 82 [2020-10-27 19:57:34,321 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 19:57:34,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:57:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 19:57:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-10-27 19:57:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 19:57:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-27 19:57:34,330 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-10-27 19:57:34,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:34,331 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-27 19:57:34,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 19:57:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-27 19:57:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 19:57:34,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:34,331 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:34,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:57:34,332 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:34,332 INFO L82 PathProgramCache]: Analyzing trace with hash -27254675, now seen corresponding path program 23 times [2020-10-27 19:57:34,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:34,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571402941] [2020-10-27 19:57:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:35,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:35,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 19:57:35,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:35,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1114 [2020-10-27 19:57:35,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 19:57:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 19:57:35,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:35,975 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-27 19:57:36,146 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-27 19:57:36,370 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-27 19:57:36,644 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-27 19:57:37,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:37,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:37,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:37,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:37,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:37,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:37,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:37,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571402941] [2020-10-27 19:57:37,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:37,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 19:57:37,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318676630] [2020-10-27 19:57:37,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 19:57:37,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 19:57:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:57:37,751 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 25 states. [2020-10-27 19:57:38,434 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 19:57:38,839 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 19:57:39,040 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 19:57:39,271 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 19:57:39,605 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 85 [2020-10-27 19:57:39,968 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 90 [2020-10-27 19:57:40,364 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 83 [2020-10-27 19:57:40,758 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 86 [2020-10-27 19:57:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:41,454 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-27 19:57:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:57:41,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-27 19:57:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:41,456 INFO L225 Difference]: With dead ends: 83 [2020-10-27 19:57:41,456 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 19:57:41,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:57:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 19:57:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-27 19:57:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 19:57:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-27 19:57:41,466 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 56 [2020-10-27 19:57:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:41,466 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-27 19:57:41,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 19:57:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-27 19:57:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 19:57:41,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:41,467 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:41,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:57:41,468 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash 153298982, now seen corresponding path program 24 times [2020-10-27 19:57:41,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:41,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208226040] [2020-10-27 19:57:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:41,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:42,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:42,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 19:57:42,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:42,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1256 [2020-10-27 19:57:42,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:42,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 19:57:42,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:42,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:57:42,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:43,235 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 19:57:43,375 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 19:57:43,592 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 19:57:43,923 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-27 19:57:44,081 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 19:57:44,248 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-27 19:57:44,416 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-27 19:57:45,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:45,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:45,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:45,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:45,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:45,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:45,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:45,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:45,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208226040] [2020-10-27 19:57:45,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:45,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 19:57:45,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320531275] [2020-10-27 19:57:45,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 19:57:45,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 19:57:45,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:57:45,196 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 25 states. [2020-10-27 19:57:45,732 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 19:57:46,103 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 19:57:46,533 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 19:57:46,745 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 19:57:47,098 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 92 [2020-10-27 19:57:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:48,234 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-27 19:57:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:57:48,234 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-27 19:57:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:48,236 INFO L225 Difference]: With dead ends: 88 [2020-10-27 19:57:48,236 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 19:57:48,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=159, Invalid=1733, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:57:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 19:57:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2020-10-27 19:57:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:57:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 19:57:48,249 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 58 [2020-10-27 19:57:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:48,249 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 19:57:48,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 19:57:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 19:57:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 19:57:48,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:48,250 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:48,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:57:48,250 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1444864014, now seen corresponding path program 25 times [2020-10-27 19:57:48,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:48,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073373993] [2020-10-27 19:57:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:48,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:49,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:49,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 19:57:49,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:49,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1371 [2020-10-27 19:57:49,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 19:57:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 19:57:49,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:57:50,365 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-27 19:57:50,646 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-27 19:57:50,878 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-27 19:57:51,156 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-10-27 19:57:51,591 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 19:57:52,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:52,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:52,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073373993] [2020-10-27 19:57:52,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:52,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 19:57:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548386416] [2020-10-27 19:57:52,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 19:57:52,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 19:57:52,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:57:52,438 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 26 states. [2020-10-27 19:57:53,121 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-27 19:57:53,515 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-27 19:57:53,982 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-27 19:57:54,209 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 19:57:54,570 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 87 [2020-10-27 19:57:54,787 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 19:57:55,131 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 92 [2020-10-27 19:57:55,693 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 19:57:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:56,403 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-27 19:57:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:57:56,404 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 19:57:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:56,405 INFO L225 Difference]: With dead ends: 108 [2020-10-27 19:57:56,406 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 19:57:56,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:57:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 19:57:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2020-10-27 19:57:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:57:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-27 19:57:56,422 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 59 [2020-10-27 19:57:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:56,423 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-27 19:57:56,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 19:57:56,423 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-27 19:57:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 19:57:56,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:56,424 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:56,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:57:56,424 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash 130077081, now seen corresponding path program 26 times [2020-10-27 19:57:56,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:56,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727207178] [2020-10-27 19:57:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:56,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:57,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:57,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 19:57:57,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:57,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-27 19:57:57,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:57,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 19:57:57,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:57,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 19:57:57,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:58,650 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-27 19:57:58,784 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-27 19:57:59,039 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-27 19:57:59,227 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 19:57:59,494 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-27 19:57:59,724 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-27 19:57:59,943 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 19:58:00,141 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-27 19:58:00,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:00,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:00,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:00,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:00,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:58:00,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:00,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:00,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:00,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:00,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:00,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727207178] [2020-10-27 19:58:00,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:00,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 19:58:00,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253416705] [2020-10-27 19:58:00,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 19:58:00,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 19:58:00,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:58:00,885 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 25 states. [2020-10-27 19:58:01,733 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2020-10-27 19:58:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:02,776 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-27 19:58:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:58:02,777 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-27 19:58:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:02,778 INFO L225 Difference]: With dead ends: 101 [2020-10-27 19:58:02,778 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 19:58:02,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:58:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 19:58:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-27 19:58:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 19:58:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-27 19:58:02,791 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-27 19:58:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:02,791 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-27 19:58:02,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 19:58:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-27 19:58:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 19:58:02,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:02,792 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:02,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:58:02,792 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:02,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1031260595, now seen corresponding path program 27 times [2020-10-27 19:58:02,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:02,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414026874] [2020-10-27 19:58:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:02,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:04,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:04,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 19:58:04,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:04,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1485 [2020-10-27 19:58:04,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:58:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:58:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 19:58:04,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:04,999 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 19:58:05,317 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-27 19:58:05,469 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 19:58:05,739 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-27 19:58:05,922 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-27 19:58:06,175 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-10-27 19:58:06,641 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-27 19:58:07,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:07,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:07,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:07,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414026874] [2020-10-27 19:58:07,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:07,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 19:58:07,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262341045] [2020-10-27 19:58:07,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 19:58:07,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 19:58:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:58:07,528 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 27 states. [2020-10-27 19:58:08,494 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 19:58:08,960 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 92 [2020-10-27 19:58:09,207 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 19:58:09,639 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 97 [2020-10-27 19:58:09,903 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-27 19:58:10,136 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-27 19:58:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:11,145 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-27 19:58:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:58:11,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-27 19:58:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:11,147 INFO L225 Difference]: With dead ends: 92 [2020-10-27 19:58:11,147 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 19:58:11,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:58:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 19:58:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2020-10-27 19:58:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:58:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 19:58:11,160 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 62 [2020-10-27 19:58:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:11,161 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 19:58:11,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 19:58:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 19:58:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 19:58:11,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:11,162 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:11,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:58:11,162 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:11,162 INFO L82 PathProgramCache]: Analyzing trace with hash 488494763, now seen corresponding path program 28 times [2020-10-27 19:58:11,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:11,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918775154] [2020-10-27 19:58:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:11,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1804 [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 19:58:13,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:13,631 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 19:58:13,758 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 19:58:13,993 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-27 19:58:14,148 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-27 19:58:14,398 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-27 19:58:14,781 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-27 19:58:15,241 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-27 19:58:15,456 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 19:58:15,678 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-27 19:58:15,845 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-27 19:58:16,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:16,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 2 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:16,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918775154] [2020-10-27 19:58:16,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:16,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:58:16,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031216852] [2020-10-27 19:58:16,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:58:16,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:16,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:58:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:58:16,538 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-27 19:58:17,488 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 19:58:17,938 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 86 [2020-10-27 19:58:18,200 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 19:58:18,569 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-27 19:58:19,071 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 107 [2020-10-27 19:58:19,652 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 114 [2020-10-27 19:58:20,269 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 98 [2020-10-27 19:58:20,938 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 108 [2020-10-27 19:58:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:21,601 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-27 19:58:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:58:21,602 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 19:58:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:21,603 INFO L225 Difference]: With dead ends: 95 [2020-10-27 19:58:21,603 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 19:58:21,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:58:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 19:58:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2020-10-27 19:58:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:58:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 19:58:21,618 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-10-27 19:58:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:21,619 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 19:58:21,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:58:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 19:58:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 19:58:21,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:21,620 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:21,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:58:21,620 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1632977390, now seen corresponding path program 29 times [2020-10-27 19:58:21,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:21,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136740225] [2020-10-27 19:58:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:21,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:23,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:23,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:58:23,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:23,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1602 [2020-10-27 19:58:23,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:58:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:58:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 19:58:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:23,909 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-27 19:58:24,169 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-27 19:58:24,308 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 19:58:24,525 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-27 19:58:24,718 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 19:58:25,009 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-27 19:58:26,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:26,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:26,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:26,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:26,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:26,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:58:26,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:26,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:26,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136740225] [2020-10-27 19:58:26,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:26,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:58:26,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018501042] [2020-10-27 19:58:26,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:58:26,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:26,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:58:26,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:58:26,309 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-27 19:58:27,148 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-27 19:58:27,606 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 19:58:27,836 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 19:58:28,117 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-27 19:58:28,362 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 19:58:28,774 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 109 [2020-10-27 19:58:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:30,199 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-27 19:58:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:58:30,200 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-27 19:58:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:30,201 INFO L225 Difference]: With dead ends: 98 [2020-10-27 19:58:30,201 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 19:58:30,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=177, Invalid=2175, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 19:58:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 19:58:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2020-10-27 19:58:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 19:58:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-27 19:58:30,218 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 65 [2020-10-27 19:58:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:30,219 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-27 19:58:30,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:58:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-27 19:58:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 19:58:30,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:30,219 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:30,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:58:30,220 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 148625652, now seen corresponding path program 30 times [2020-10-27 19:58:30,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:30,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253253719] [2020-10-27 19:58:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:30,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:31,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:31,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 19:58:31,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1586 [2020-10-27 19:58:31,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:58:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:58:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 19:58:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:32,623 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-27 19:58:32,909 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 19:58:33,040 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 19:58:33,312 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-27 19:58:33,675 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-27 19:58:34,144 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-10-27 19:58:34,446 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-27 19:58:34,750 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-27 19:58:34,930 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 19:58:35,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:35,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:35,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:35,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:35,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:35,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:58:35,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:35,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:35,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:35,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:35,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:35,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253253719] [2020-10-27 19:58:35,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:35,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 19:58:35,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041636945] [2020-10-27 19:58:35,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 19:58:35,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:35,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 19:58:35,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:58:35,973 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 29 states. [2020-10-27 19:58:36,676 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 19:58:36,996 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-27 19:58:37,485 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-27 19:58:37,704 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 19:58:38,034 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-27 19:58:38,299 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 19:58:38,709 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 100 [2020-10-27 19:58:38,952 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 19:58:39,371 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 111 [2020-10-27 19:58:39,545 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 19:58:40,052 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 19:58:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:40,986 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2020-10-27 19:58:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:58:40,987 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-27 19:58:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:40,988 INFO L225 Difference]: With dead ends: 121 [2020-10-27 19:58:40,989 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 19:58:40,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=195, Invalid=2355, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:58:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 19:58:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-27 19:58:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:58:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-27 19:58:41,008 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 66 [2020-10-27 19:58:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:41,008 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-27 19:58:41,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 19:58:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-27 19:58:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 19:58:41,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:41,009 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:41,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:58:41,010 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash -184523731, now seen corresponding path program 31 times [2020-10-27 19:58:41,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:41,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422273584] [2020-10-27 19:58:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:41,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:42,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:42,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 19:58:42,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:42,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1539 [2020-10-27 19:58:42,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:42,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:58:42,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:58:42,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 19:58:42,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:43,180 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 19:58:43,326 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-27 19:58:43,540 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-27 19:58:43,684 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-27 19:58:43,943 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-10-27 19:58:44,120 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-27 19:58:44,407 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-27 19:58:44,640 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-27 19:58:44,857 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-27 19:58:45,051 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-27 19:58:46,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:46,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:46,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:46,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:46,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:58:46,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:46,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:46,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422273584] [2020-10-27 19:58:46,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:46,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:58:46,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392076630] [2020-10-27 19:58:46,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:58:46,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:58:46,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:58:46,099 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 28 states. [2020-10-27 19:58:46,734 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-10-27 19:58:46,949 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 19:58:47,222 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 19:58:47,469 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-27 19:58:47,800 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-27 19:58:48,081 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 19:58:48,515 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2020-10-27 19:58:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:49,856 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-27 19:58:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:58:49,857 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-10-27 19:58:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:49,858 INFO L225 Difference]: With dead ends: 111 [2020-10-27 19:58:49,858 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 19:58:49,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:58:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 19:58:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-27 19:58:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 19:58:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-27 19:58:49,875 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2020-10-27 19:58:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:49,875 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-27 19:58:49,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:58:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-27 19:58:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 19:58:49,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:49,876 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:49,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:58:49,876 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:49,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1654143477, now seen corresponding path program 32 times [2020-10-27 19:58:49,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:49,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672246174] [2020-10-27 19:58:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:50,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:52,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:52,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 19:58:52,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:52,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2058 [2020-10-27 19:58:52,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 19:58:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:58:52,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 19:58:52,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:52,687 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 19:58:52,912 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-27 19:58:53,212 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-27 19:58:53,725 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-27 19:58:53,961 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 19:58:54,276 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-10-27 19:58:54,588 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 19:58:54,889 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-27 19:58:55,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:55,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:55,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:55,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:55,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:58:55,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:55,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:55,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672246174] [2020-10-27 19:58:55,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:55,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 19:58:55,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130089035] [2020-10-27 19:58:55,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 19:58:55,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 19:58:55,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:58:55,983 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2020-10-27 19:58:57,273 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2020-10-27 19:58:57,519 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-27 19:58:57,837 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-27 19:58:58,110 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 19:58:58,488 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-27 19:58:58,788 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-27 19:58:59,281 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 115 [2020-10-27 19:59:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:59:00,818 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-27 19:59:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:59:00,819 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-27 19:59:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:59:00,820 INFO L225 Difference]: With dead ends: 102 [2020-10-27 19:59:00,820 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:59:00,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 19:59:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:59:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-27 19:59:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:59:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-27 19:59:00,835 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 69 [2020-10-27 19:59:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:59:00,836 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-27 19:59:00,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 19:59:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-27 19:59:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 19:59:00,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:59:00,837 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:59:00,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:59:00,837 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:59:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:59:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash -507523045, now seen corresponding path program 33 times [2020-10-27 19:59:00,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:59:00,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480545156] [2020-10-27 19:59:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:59:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:01,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:02,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:02,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 19:59:02,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-27 19:59:02,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 19:59:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:59:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 19:59:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:03,483 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-27 19:59:03,736 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-27 19:59:03,991 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-27 19:59:04,140 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-27 19:59:04,405 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-27 19:59:04,612 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-27 19:59:04,972 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 88 [2020-10-27 19:59:05,214 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-27 19:59:05,637 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92 [2020-10-27 19:59:05,984 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 19:59:06,268 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-10-27 19:59:06,557 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-10-27 19:59:06,807 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-27 19:59:07,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:59:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:07,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:07,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:59:07,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:07,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:59:07,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:59:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:59:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:59:07,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:59:07,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480545156] [2020-10-27 19:59:07,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:59:07,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 19:59:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191905331] [2020-10-27 19:59:07,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 19:59:07,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:59:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 19:59:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:59:07,772 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-10-27 19:59:08,729 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-27 19:59:08,947 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 19:59:09,235 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-27 19:59:09,478 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 19:59:09,805 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-27 19:59:10,105 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-27 19:59:10,465 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-27 19:59:10,772 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-27 19:59:11,342 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 120 [2020-10-27 19:59:11,939 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 110 [2020-10-27 19:59:12,526 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-27 19:59:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:59:13,656 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-27 19:59:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:59:13,657 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-27 19:59:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:59:13,658 INFO L225 Difference]: With dead ends: 103 [2020-10-27 19:59:13,658 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 19:59:13,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=210, Invalid=2546, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:59:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 19:59:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2020-10-27 19:59:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:59:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-27 19:59:13,678 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 70 [2020-10-27 19:59:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:59:13,678 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-27 19:59:13,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 19:59:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-27 19:59:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:59:13,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:59:13,679 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:59:13,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:59:13,680 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:59:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:59:13,680 INFO L82 PathProgramCache]: Analyzing trace with hash 616770964, now seen corresponding path program 34 times [2020-10-27 19:59:13,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:59:13,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131883309] [2020-10-27 19:59:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:59:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2209 [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 19:59:15,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:16,907 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-27 19:59:17,179 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 19:59:17,333 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-27 19:59:17,552 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-27 19:59:17,824 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-27 19:59:18,272 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-10-27 19:59:18,816 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 116 [2020-10-27 19:59:19,762 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 130 [2020-10-27 19:59:20,695 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2020-10-27 19:59:21,932 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-10-27 19:59:22,295 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 73 [2020-10-27 19:59:23,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:59:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:23,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:23,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:23,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:59:23,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:23,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:59:23,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:23,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:59:23,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:59:23,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:59:23,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:59:23,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131883309] [2020-10-27 19:59:23,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:59:23,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 19:59:23,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017826273] [2020-10-27 19:59:23,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 19:59:23,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:59:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 19:59:23,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:59:23,341 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-10-27 19:59:24,332 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 19:59:25,549 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 129 [2020-10-27 19:59:26,145 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-27 19:59:28,108 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 234 DAG size of output: 175 [2020-10-27 19:59:29,164 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 160 [2020-10-27 19:59:32,594 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 288 DAG size of output: 238 [2020-10-27 19:59:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:59:34,587 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-27 19:59:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 19:59:34,588 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-27 19:59:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:59:34,590 INFO L225 Difference]: With dead ends: 108 [2020-10-27 19:59:34,590 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 19:59:34,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=193, Invalid=2563, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:59:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 19:59:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-27 19:59:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:59:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-27 19:59:34,614 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 72 [2020-10-27 19:59:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:59:34,614 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-27 19:59:34,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 19:59:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-27 19:59:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 19:59:34,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:59:34,615 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:59:34,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:59:34,616 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:59:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:59:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1711155588, now seen corresponding path program 35 times [2020-10-27 19:59:34,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:59:34,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491136486] [2020-10-27 19:59:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:59:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:34,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:37,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:37,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 19:59:37,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:37,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2980 [2020-10-27 19:59:37,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:37,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 19:59:37,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:59:37,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 19:59:37,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:38,482 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 19:59:38,730 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-27 19:59:38,892 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 19:59:39,233 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-27 19:59:39,417 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-27 19:59:39,854 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-27 19:59:40,316 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2020-10-27 19:59:40,477 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 19:59:40,742 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-27 19:59:40,911 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 19:59:41,272 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-27 19:59:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:59:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:59:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:59:42,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491136486] [2020-10-27 19:59:42,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:59:42,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 19:59:42,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3368385] [2020-10-27 19:59:42,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 19:59:42,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:59:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 19:59:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:59:42,359 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 32 states. [2020-10-27 19:59:43,683 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 19:59:44,001 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 19:59:44,721 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 125 [2020-10-27 19:59:45,411 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 109 [2020-10-27 19:59:46,089 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 112 [2020-10-27 19:59:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:59:47,081 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-27 19:59:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 19:59:47,082 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-27 19:59:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:59:47,083 INFO L225 Difference]: With dead ends: 111 [2020-10-27 19:59:47,083 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 19:59:47,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:59:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 19:59:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 81. [2020-10-27 19:59:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:59:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-27 19:59:47,101 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 73 [2020-10-27 19:59:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:59:47,101 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-27 19:59:47,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 19:59:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-27 19:59:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 19:59:47,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:59:47,102 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:59:47,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:59:47,103 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:59:47,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:59:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash -895963797, now seen corresponding path program 36 times [2020-10-27 19:59:47,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:59:47,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696034128] [2020-10-27 19:59:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:59:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:47,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:49,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:49,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 19:59:49,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2337 [2020-10-27 19:59:49,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 19:59:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:59:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:59:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:50,002 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 19:59:50,174 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 19:59:50,509 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-27 19:59:50,852 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-27 19:59:51,478 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-10-27 19:59:51,646 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 19:59:52,024 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2020-10-27 19:59:52,257 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-27 19:59:52,472 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 19:59:53,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:59:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:53,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:53,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:59:53,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:53,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:59:53,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:53,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:59:53,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:59:53,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:59:53,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:59:53,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696034128] [2020-10-27 19:59:53,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:59:53,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 19:59:53,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263471665] [2020-10-27 19:59:53,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 19:59:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:59:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 19:59:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:59:53,787 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 31 states. [2020-10-27 19:59:54,461 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-27 19:59:54,987 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 19:59:55,242 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 19:59:55,789 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2020-10-27 19:59:56,121 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-27 19:59:57,018 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 100 [2020-10-27 19:59:57,431 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-27 19:59:58,352 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 133 [2020-10-27 19:59:58,865 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-10-27 20:00:00,122 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 160 [2020-10-27 20:00:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:02,278 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2020-10-27 20:00:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:00:02,279 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-10-27 20:00:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:02,280 INFO L225 Difference]: With dead ends: 115 [2020-10-27 20:00:02,281 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:00:02,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=167, Invalid=2589, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:00:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:00:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-27 20:00:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 20:00:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 20:00:02,297 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2020-10-27 20:00:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:02,297 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 20:00:02,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:00:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 20:00:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:00:02,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:02,298 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:02,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:00:02,299 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:02,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1180374149, now seen corresponding path program 37 times [2020-10-27 20:00:02,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:02,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980122516] [2020-10-27 20:00:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:02,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:07,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:07,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:00:07,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:07,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4541 [2020-10-27 20:00:07,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:07,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:00:07,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:07,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:00:07,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0