/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:19:44,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:19:44,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:19:44,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:19:44,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:19:44,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:19:44,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:19:44,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:19:44,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:19:44,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:19:44,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:19:44,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:19:44,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:19:44,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:19:44,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:19:44,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:19:44,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:19:44,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:19:44,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:19:44,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:19:44,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:19:44,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:19:44,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:19:44,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:19:44,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:19:44,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:19:44,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:19:44,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:19:44,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:19:44,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:19:44,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:19:44,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:19:44,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:19:44,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:19:44,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:19:44,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:19:44,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:19:44,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:19:44,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:19:44,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:19:44,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:19:44,275 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 01:19:44,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:19:44,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:19:44,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:19:44,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:19:44,305 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:19:44,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:19:44,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:19:44,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:19:44,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:19:44,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:19:44,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:19:44,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:19:44,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:19:44,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:19:44,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:19:44,307 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:19:44,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:19:44,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:19:44,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:19:44,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:19:44,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:19:44,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:19:44,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:19:44,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:19:44,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:19:44,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:19:44,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:19:44,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:19:44,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:19:44,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:19:44,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:19:44,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:19:44,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:19:44,709 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:19:44,709 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:19:44,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i [2020-10-27 01:19:44,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71f99b6d2/bc14948cc6134e09b7b14bd37c683926/FLAGba32adcb1 [2020-10-27 01:19:45,590 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:19:45,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple_built_from_end.i [2020-10-27 01:19:45,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71f99b6d2/bc14948cc6134e09b7b14bd37c683926/FLAGba32adcb1 [2020-10-27 01:19:45,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71f99b6d2/bc14948cc6134e09b7b14bd37c683926 [2020-10-27 01:19:45,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:19:45,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:19:45,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:45,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:19:45,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:19:45,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:45" (1/1) ... [2020-10-27 01:19:45,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ff4845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:45, skipping insertion in model container [2020-10-27 01:19:45,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:45" (1/1) ... [2020-10-27 01:19:45,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:19:45,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:19:46,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:46,266 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:19:46,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:46,393 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:19:46,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46 WrapperNode [2020-10-27 01:19:46,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:46,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:19:46,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:19:46,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:19:46,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (1/1) ... [2020-10-27 01:19:46,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (1/1) ... [2020-10-27 01:19:46,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (1/1) ... [2020-10-27 01:19:46,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (1/1) ... [2020-10-27 01:19:46,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (1/1) ... [2020-10-27 01:19:46,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (1/1) ... [2020-10-27 01:19:46,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (1/1) ... [2020-10-27 01:19:46,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:19:46,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:19:46,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:19:46,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:19:46,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (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 01:19:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:19:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:19:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:19:46,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:19:46,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:19:46,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-27 01:19:46,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-27 01:19:46,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-27 01:19:46,541 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:19:46,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:19:46,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:19:46,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:19:46,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:19:46,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:19:46,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:19:46,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:19:46,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:19:46,543 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:19:46,543 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:19:46,543 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:19:46,543 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:19:46,544 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:19:46,544 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:19:46,544 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:19:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:19:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:19:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:19:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:19:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:19:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:19:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:19:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:19:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:19:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:19:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:19:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-27 01:19:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-27 01:19:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-27 01:19:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:19:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:19:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:19:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:19:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:19:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:19:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:19:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:19:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:19:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:19:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:19:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:19:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:19:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:19:46,592 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:19:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:19:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:19:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:19:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:19:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:19:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:19:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:19:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:19:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:19:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:19:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:19:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:19:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:19:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:19:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:19:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:19:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:19:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:19:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:19:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:19:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:19:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:19:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:19:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:19:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:19:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:19:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:19:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:19:46,604 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:19:46,604 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:19:46,604 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:19:46,604 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:19:46,604 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:19:46,604 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:19:46,604 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:19:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:19:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:19:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:19:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:19:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:19:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:19:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:19:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:19:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:19:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:19:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:19:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:19:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:19:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:19:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:19:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:19:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:19:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:19:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:19:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:19:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:19:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:19:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:19:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:19:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:19:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:19:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:19:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:19:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:19:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:19:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:19:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:19:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:19:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:19:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:19:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:19:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:19:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:19:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:19:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:19:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:19:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:19:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:19:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:19:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:19:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:19:47,029 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:19:47,193 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:19:47,193 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:19:47,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:47 BoogieIcfgContainer [2020-10-27 01:19:47,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:19:47,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:19:47,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:19:47,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:19:47,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:19:45" (1/3) ... [2020-10-27 01:19:47,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa5e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:47, skipping insertion in model container [2020-10-27 01:19:47,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:46" (2/3) ... [2020-10-27 01:19:47,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa5e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:47, skipping insertion in model container [2020-10-27 01:19:47,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:47" (3/3) ... [2020-10-27 01:19:47,205 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-10-27 01:19:47,218 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:19:47,223 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:19:47,237 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:19:47,266 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:19:47,266 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:19:47,266 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:19:47,266 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:19:47,266 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:19:47,267 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:19:47,267 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:19:47,267 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:19:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-27 01:19:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:19:47,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:47,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:47,291 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash -58088377, now seen corresponding path program 1 times [2020-10-27 01:19:47,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:47,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630103862] [2020-10-27 01:19:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:47,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:47,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:47,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:47,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 01:19:47,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:47,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-27 01:19:47,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:47,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:19:47,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:47,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:19:47,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:19:47,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:47,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:47,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:47,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:47,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:19:47,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:47,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:47,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:47,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:47,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:47,918 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 01:19:47,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630103862] [2020-10-27 01:19:47,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:47,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:19:47,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033069035] [2020-10-27 01:19:47,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:19:47,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:47,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:19:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:19:47,948 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2020-10-27 01:19:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:48,093 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-10-27 01:19:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:19:48,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:19:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:48,103 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:19:48,103 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:19:48,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:19:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:19:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 01:19:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:19:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 01:19:48,154 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2020-10-27 01:19:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:48,154 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 01:19:48,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:19:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 01:19:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:19:48,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:48,156 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:48,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:19:48,156 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1616629271, now seen corresponding path program 1 times [2020-10-27 01:19:48,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:48,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283579645] [2020-10-27 01:19:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:48,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:48,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:19:48,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:48,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 01:19:48,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:48,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:19:48,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:19:48,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:19:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:48,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:48,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:48,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:48,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:48,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:48,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:19:48,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:48,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:48,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:48,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:48,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283579645] [2020-10-27 01:19:48,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:48,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:19:48,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466123705] [2020-10-27 01:19:48,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:19:48,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:48,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:19:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:19:48,461 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-27 01:19:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:48,558 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-27 01:19:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:19:48,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 01:19:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:48,560 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:19:48,560 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:19:48,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:19:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-27 01:19:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:19:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 01:19:48,569 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-10-27 01:19:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:48,569 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 01:19:48,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:19:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 01:19:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:19:48,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:48,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:48,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:19:48,572 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1321002758, now seen corresponding path program 1 times [2020-10-27 01:19:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:48,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219281296] [2020-10-27 01:19:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:48,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:48,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:19:48,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 01:19:48,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:48,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:19:48,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:48,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:48,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:48,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:48,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:48,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:48,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:19:48,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:48,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:48,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:48,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:48,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:48,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219281296] [2020-10-27 01:19:48,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:48,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:19:48,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020137696] [2020-10-27 01:19:48,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:19:48,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:48,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:19:48,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:19:48,932 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-27 01:19:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:49,055 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-27 01:19:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:49,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 01:19:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:49,057 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:19:49,057 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:19:49,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:19:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 01:19:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:19:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 01:19:49,074 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-10-27 01:19:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:49,074 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 01:19:49,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:19:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 01:19:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:19:49,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:49,075 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:49,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:19:49,076 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:49,076 INFO L82 PathProgramCache]: Analyzing trace with hash -154266195, now seen corresponding path program 2 times [2020-10-27 01:19:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:49,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115159754] [2020-10-27 01:19:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:49,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:49,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:49,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:19:49,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:49,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-27 01:19:49,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:49,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:19:49,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:49,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:19:49,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:49,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:49,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:49,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:49,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:49,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:49,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:49,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:49,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:49,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115159754] [2020-10-27 01:19:49,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:49,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:19:49,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253175999] [2020-10-27 01:19:49,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:19:49,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:19:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:19:49,677 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-27 01:19:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:49,954 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-27 01:19:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:19:49,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:19:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:49,956 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:19:49,956 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:19:49,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:19:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:19:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-27 01:19:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:19:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-27 01:19:49,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-10-27 01:19:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:49,964 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-27 01:19:49,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:19:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-27 01:19:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:19:49,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:49,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:49,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:19:49,966 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash -342528080, now seen corresponding path program 3 times [2020-10-27 01:19:49,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:49,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250181907] [2020-10-27 01:19:49,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:50,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:50,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:19:50,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:50,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 01:19:50,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:50,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:50,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:50,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:19:50,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:50,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:50,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:50,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:50,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:50,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:19:50,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:50,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:50,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:50,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250181907] [2020-10-27 01:19:50,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:50,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:19:50,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87440207] [2020-10-27 01:19:50,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:19:50,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:50,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:19:50,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:19:50,447 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-10-27 01:19:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:50,633 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-27 01:19:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:50,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:19:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:50,634 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:19:50,635 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:19:50,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:19:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:19:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-27 01:19:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:19:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-27 01:19:50,642 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-10-27 01:19:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:50,642 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-27 01:19:50,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:19:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-27 01:19:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:19:50,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:50,644 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:50,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:19:50,644 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2019084073, now seen corresponding path program 4 times [2020-10-27 01:19:50,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:50,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240104653] [2020-10-27 01:19:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:50,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:51,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:51,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:19:51,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:51,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-27 01:19:51,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:51,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:19:51,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:51,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:19:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:51,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:51,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:51,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:51,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:51,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:51,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:51,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:51,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:51,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240104653] [2020-10-27 01:19:51,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:51,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:19:51,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816592884] [2020-10-27 01:19:51,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:19:51,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:19:51,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:19:51,275 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-27 01:19:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:51,822 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-27 01:19:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:19:51,823 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 01:19:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:51,824 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:19:51,824 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:19:51,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:19:51,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:19:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-27 01:19:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:19:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 01:19:51,831 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2020-10-27 01:19:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:51,832 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 01:19:51,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:19:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 01:19:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:19:51,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:51,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:51,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:19:51,833 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash -696681292, now seen corresponding path program 5 times [2020-10-27 01:19:51,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:51,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551633674] [2020-10-27 01:19:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:51,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:52,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:52,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:19:52,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-27 01:19:52,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:19:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:52,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:52,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:52,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:52,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:52,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:52,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:52,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:52,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:52,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551633674] [2020-10-27 01:19:52,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:52,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:19:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303195580] [2020-10-27 01:19:52,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:19:52,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:19:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:19:52,611 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-10-27 01:19:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:52,951 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-27 01:19:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:19:52,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 01:19:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:52,952 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:19:52,953 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:19:52,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:19:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:19:52,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-27 01:19:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:19:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 01:19:52,960 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2020-10-27 01:19:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:52,960 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 01:19:52,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:19:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 01:19:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:19:52,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:52,962 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:52,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:19:52,962 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:52,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1744536805, now seen corresponding path program 6 times [2020-10-27 01:19:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:52,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089406823] [2020-10-27 01:19:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:53,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:53,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:19:53,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:53,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-27 01:19:53,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:53,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:19:53,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:53,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:19:53,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:54,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:54,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:54,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:54,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:54,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:54,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:19:54,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:54,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:54,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:54,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:54,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:54,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089406823] [2020-10-27 01:19:54,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:54,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:19:54,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155606805] [2020-10-27 01:19:54,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:19:54,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:54,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:19:54,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:54,196 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-10-27 01:19:55,027 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-27 01:19:55,169 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 01:19:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:55,492 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-27 01:19:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:19:55,493 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 01:19:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:55,494 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:19:55,494 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:19:55,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:19:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:19:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 01:19:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:19:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-27 01:19:55,503 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2020-10-27 01:19:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:55,504 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-27 01:19:55,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:19:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-27 01:19:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:19:55,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:55,505 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:55,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:19:55,506 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:55,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1689971586, now seen corresponding path program 7 times [2020-10-27 01:19:55,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:55,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259439408] [2020-10-27 01:19:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:55,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:19:56,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:56,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-27 01:19:56,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:19:56,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:56,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:19:56,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:56,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:56,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:19:56,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:56,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:56,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259439408] [2020-10-27 01:19:56,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:56,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:19:56,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017870390] [2020-10-27 01:19:57,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:19:57,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:19:57,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:57,002 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-10-27 01:19:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:57,599 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-27 01:19:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:57,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-27 01:19:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:57,600 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:19:57,601 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:19:57,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:19:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:19:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-27 01:19:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:19:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-27 01:19:57,620 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-10-27 01:19:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:57,620 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-27 01:19:57,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:19:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-27 01:19:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:19:57,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:57,625 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:57,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:19:57,626 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash -368100549, now seen corresponding path program 8 times [2020-10-27 01:19:57,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:57,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612550987] [2020-10-27 01:19:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:57,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:58,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:58,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:19:58,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:58,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-27 01:19:58,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:58,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:19:58,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:58,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:19:58,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:59,402 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-27 01:19:59,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:59,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:59,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:59,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:59,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:59,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:59,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:59,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:59,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:59,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:19:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:59,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612550987] [2020-10-27 01:19:59,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:59,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:19:59,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271676781] [2020-10-27 01:19:59,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:19:59,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:19:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:19:59,823 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 18 states. [2020-10-27 01:20:00,485 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 01:20:00,708 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 67 [2020-10-27 01:20:00,894 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-27 01:20:01,172 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-10-27 01:20:01,394 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-27 01:20:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:01,993 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-27 01:20:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:20:01,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 01:20:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:01,994 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:20:01,995 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:20:01,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:20:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:20:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-27 01:20:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:20:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 01:20:02,004 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2020-10-27 01:20:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:02,004 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 01:20:02,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:20:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 01:20:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:02,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:02,006 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:02,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:20:02,006 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1245268126, now seen corresponding path program 9 times [2020-10-27 01:20:02,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:02,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332448709] [2020-10-27 01:20:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:03,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:03,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:20:03,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:03,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-27 01:20:03,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:03,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:20:03,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:03,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:20:03,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:03,784 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-27 01:20:04,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:04,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:04,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:04,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:04,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:04,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:04,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:04,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332448709] [2020-10-27 01:20:04,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:04,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:20:04,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448741547] [2020-10-27 01:20:04,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:20:04,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:04,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:20:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:20:04,110 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 18 states. [2020-10-27 01:20:04,647 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-27 01:20:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:04,863 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-27 01:20:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:20:04,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-27 01:20:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:04,865 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:20:04,865 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:20:04,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:20:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:20:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-27 01:20:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:20:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 01:20:04,875 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2020-10-27 01:20:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:04,876 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 01:20:04,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:20:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 01:20:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:20:04,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:04,877 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:04,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:20:04,878 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash -662375031, now seen corresponding path program 10 times [2020-10-27 01:20:04,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:04,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056001292] [2020-10-27 01:20:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:06,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:06,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:20:06,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:06,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-27 01:20:06,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:06,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:20:06,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:20:06,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:20:06,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:20:06,913 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 01:20:07,156 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 01:20:07,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:07,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:07,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:07,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:07,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:07,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:07,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:07,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:07,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056001292] [2020-10-27 01:20:07,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:07,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:20:07,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095259007] [2020-10-27 01:20:07,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:20:07,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:20:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:20:07,592 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-10-27 01:20:08,401 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-27 01:20:08,577 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-27 01:20:08,836 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2020-10-27 01:20:09,071 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-10-27 01:20:09,405 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-10-27 01:20:09,656 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-10-27 01:20:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:10,481 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-10-27 01:20:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:20:10,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-27 01:20:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:10,482 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:20:10,482 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:20:10,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:20:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:20:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-27 01:20:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:20:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-27 01:20:10,499 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2020-10-27 01:20:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:10,500 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-27 01:20:10,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:20:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-27 01:20:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:20:10,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:10,506 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:10,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:20:10,506 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1948110252, now seen corresponding path program 11 times [2020-10-27 01:20:10,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:10,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370933995] [2020-10-27 01:20:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:10,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:12,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:12,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:20:12,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:12,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1630 [2020-10-27 01:20:12,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:12,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:20:12,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:12,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:20:12,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:20:12,906 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 01:20:13,196 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-27 01:20:13,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:13,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:13,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:13,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:13,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:13,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:13,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:13,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370933995] [2020-10-27 01:20:13,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:13,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:20:13,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705762578] [2020-10-27 01:20:13,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:20:13,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:13,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:20:13,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:20:13,701 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2020-10-27 01:20:14,353 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-27 01:20:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:14,760 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-27 01:20:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:14,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-27 01:20:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:14,762 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:20:14,763 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:20:14,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:20:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:20:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-10-27 01:20:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:20:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-27 01:20:14,773 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-10-27 01:20:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:14,773 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-27 01:20:14,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:20:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-27 01:20:14,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:20:14,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:14,775 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:14,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:20:14,775 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:14,776 INFO L82 PathProgramCache]: Analyzing trace with hash -745534899, now seen corresponding path program 12 times [2020-10-27 01:20:14,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:14,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206743071] [2020-10-27 01:20:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:14,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:17,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:17,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:20:17,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:17,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2518 [2020-10-27 01:20:17,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:20:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:20:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:20:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:18,103 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-27 01:20:18,452 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-27 01:20:18,631 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-27 01:20:18,861 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-27 01:20:19,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:19,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:19,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:19,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:19,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:19,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:19,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:19,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:19,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:19,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 24 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:19,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206743071] [2020-10-27 01:20:19,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:19,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:20:19,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436332772] [2020-10-27 01:20:19,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:20:19,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:19,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:20:19,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:20:19,562 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 24 states. [2020-10-27 01:20:20,452 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-27 01:20:20,670 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-27 01:20:20,925 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-27 01:20:21,249 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 89 [2020-10-27 01:20:21,580 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 95 [2020-10-27 01:20:22,131 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 119 [2020-10-27 01:20:22,567 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 115 [2020-10-27 01:20:23,237 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 142 [2020-10-27 01:20:23,675 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 117 [2020-10-27 01:20:24,008 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-10-27 01:20:24,287 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-10-27 01:20:24,471 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-27 01:20:24,640 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-27 01:20:25,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:25,330 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-27 01:20:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:20:25,331 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-27 01:20:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:25,332 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:20:25,332 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:20:25,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:20:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:20:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-27 01:20:25,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:20:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-27 01:20:25,342 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2020-10-27 01:20:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:25,342 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-27 01:20:25,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:20:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-27 01:20:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:20:25,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:25,343 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:25,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:20:25,343 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1167608048, now seen corresponding path program 13 times [2020-10-27 01:20:25,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:25,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967266633] [2020-10-27 01:20:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:25,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:28,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:28,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:20:28,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:28,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2642 [2020-10-27 01:20:28,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:28,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:20:28,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:28,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:20:28,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:29,027 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-27 01:20:29,221 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-27 01:20:29,539 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2020-10-27 01:20:29,804 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-27 01:20:30,277 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2020-10-27 01:20:30,629 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-10-27 01:20:31,036 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 62 [2020-10-27 01:20:31,334 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2020-10-27 01:20:31,639 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2020-10-27 01:20:31,860 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-27 01:20:32,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:32,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:32,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:32,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:32,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:32,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:20:32,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:32,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:32,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:32,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:32,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:32,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967266633] [2020-10-27 01:20:32,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:32,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:20:32,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623239651] [2020-10-27 01:20:32,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:20:32,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:20:32,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:20:32,356 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-10-27 01:20:33,236 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2020-10-27 01:20:33,775 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2020-10-27 01:20:34,283 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-27 01:20:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:34,700 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-27 01:20:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:20:34,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-10-27 01:20:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:34,702 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:20:34,702 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:20:34,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:20:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:20:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-27 01:20:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:20:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 01:20:34,714 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2020-10-27 01:20:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:34,714 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 01:20:34,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:20:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 01:20:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:20:34,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:34,715 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:34,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:20:34,716 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash 214869239, now seen corresponding path program 14 times [2020-10-27 01:20:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:34,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465211207] [2020-10-27 01:20:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:34,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:38,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:38,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:20:38,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3419 [2020-10-27 01:20:38,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:38,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:20:38,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:20:38,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:20:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:39,046 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-27 01:20:39,368 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-27 01:20:39,541 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-27 01:20:39,857 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-27 01:20:40,130 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-27 01:20:40,466 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-27 01:20:40,700 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 01:20:40,901 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-27 01:20:41,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:41,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:41,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:41,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:41,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:41,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:20:41,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:41,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 16 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465211207] [2020-10-27 01:20:41,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:41,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:20:41,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063345280] [2020-10-27 01:20:41,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:20:41,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:20:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:20:41,535 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 27 states. [2020-10-27 01:20:42,461 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 01:20:42,666 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-27 01:20:42,888 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-27 01:20:43,141 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-27 01:20:43,408 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-27 01:20:43,698 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-27 01:20:44,188 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 101 [2020-10-27 01:20:44,611 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 98 [2020-10-27 01:20:45,344 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 119 [2020-10-27 01:20:45,921 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 122 [2020-10-27 01:20:46,858 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 145 [2020-10-27 01:20:47,478 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 124 [2020-10-27 01:20:47,931 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-27 01:20:48,301 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 108 [2020-10-27 01:20:48,590 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-10-27 01:20:48,860 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-10-27 01:20:49,077 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-27 01:20:49,285 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-27 01:20:49,587 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-27 01:20:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:50,097 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-10-27 01:20:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:20:50,098 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 66 [2020-10-27 01:20:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:50,099 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:20:50,099 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:20:50,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=691, Invalid=2615, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:20:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:20:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-10-27 01:20:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:20:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-27 01:20:50,109 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2020-10-27 01:20:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:50,109 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-27 01:20:50,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:20:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-27 01:20:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:20:50,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:50,111 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:50,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:20:50,111 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:50,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1454908454, now seen corresponding path program 15 times [2020-10-27 01:20:50,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:50,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468283180] [2020-10-27 01:20:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:50,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:53,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:53,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:20:53,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:53,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3373 [2020-10-27 01:20:53,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:20:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:20:53,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:54,504 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-27 01:20:54,867 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-27 01:20:55,220 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-27 01:20:55,602 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-10-27 01:20:55,853 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-27 01:20:56,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:56,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:56,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:56,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:56,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:56,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:56,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:56,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:56,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:56,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 8 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:56,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468283180] [2020-10-27 01:20:56,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:56,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:20:56,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020682392] [2020-10-27 01:20:56,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:20:56,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:56,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:20:56,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:20:56,684 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 27 states. [2020-10-27 01:20:57,731 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-27 01:20:58,036 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-27 01:20:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:58,745 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-27 01:20:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:20:58,746 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2020-10-27 01:20:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:58,747 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:20:58,747 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:20:58,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:20:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:20:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-27 01:20:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:20:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-27 01:20:58,760 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2020-10-27 01:20:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:58,760 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-27 01:20:58,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:20:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-27 01:20:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:20:58,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:58,761 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:58,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:20:58,762 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:58,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:58,762 INFO L82 PathProgramCache]: Analyzing trace with hash -666102689, now seen corresponding path program 16 times [2020-10-27 01:20:58,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:58,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625251265] [2020-10-27 01:20:58,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:58,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:02,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:02,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:21:02,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:02,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3473 [2020-10-27 01:21:02,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:21:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:21:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:21:02,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:03,791 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-27 01:21:04,027 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-27 01:21:04,588 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-27 01:21:04,940 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2020-10-27 01:21:05,751 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 90 [2020-10-27 01:21:06,383 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 81 [2020-10-27 01:21:07,065 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2020-10-27 01:21:07,692 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 83 [2020-10-27 01:21:08,571 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 81 [2020-10-27 01:21:09,107 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 63 [2020-10-27 01:21:09,585 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 57 [2020-10-27 01:21:09,927 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-27 01:21:10,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:10,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:10,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:10,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:10,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:10,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:10,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:10,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:10,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:10,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:10,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 20 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:10,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625251265] [2020-10-27 01:21:10,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:10,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:21:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579606079] [2020-10-27 01:21:10,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:21:10,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:21:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:21:10,803 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 30 states. [2020-10-27 01:21:11,860 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-27 01:21:12,116 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 01:21:12,388 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-27 01:21:12,687 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-27 01:21:13,025 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-27 01:21:13,384 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-27 01:21:14,021 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 104 [2020-10-27 01:21:14,574 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 105 [2020-10-27 01:21:15,526 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 128 [2020-10-27 01:21:16,255 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 123 [2020-10-27 01:21:17,655 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 328 DAG size of output: 149 [2020-10-27 01:21:18,599 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 151 [2020-10-27 01:21:20,301 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 374 DAG size of output: 175 [2020-10-27 01:21:21,248 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 153 [2020-10-27 01:21:21,861 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 103 [2020-10-27 01:21:22,341 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 105 [2020-10-27 01:21:22,676 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-10-27 01:21:23,006 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-10-27 01:21:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:24,350 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-10-27 01:21:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:21:24,351 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 73 [2020-10-27 01:21:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:24,352 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:21:24,352 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:21:24,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=813, Invalid=3219, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 01:21:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:21:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-27 01:21:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:21:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 01:21:24,362 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2020-10-27 01:21:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:24,362 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 01:21:24,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:21:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 01:21:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:21:24,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:24,364 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:24,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:21:24,364 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:24,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1329620034, now seen corresponding path program 17 times [2020-10-27 01:21:24,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:24,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58319327] [2020-10-27 01:21:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:27,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:27,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:21:27,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3184 [2020-10-27 01:21:27,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:21:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 01:21:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:30,739 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-27 01:21:31,057 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-27 01:21:31,269 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2020-10-27 01:21:31,776 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 77 [2020-10-27 01:21:32,407 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 68 [2020-10-27 01:21:33,253 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 91 [2020-10-27 01:21:33,950 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 83 [2020-10-27 01:21:34,849 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 102 [2020-10-27 01:21:38,014 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 440 DAG size of output: 120 [2020-10-27 01:21:40,356 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 467 DAG size of output: 72 [2020-10-27 01:21:41,159 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 55 [2020-10-27 01:21:41,831 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 50 [2020-10-27 01:21:42,099 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 45 [2020-10-27 01:21:42,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:42,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:42,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:42,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:42,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:42,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:42,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:42,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 9 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:43,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58319327] [2020-10-27 01:21:43,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:43,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:21:43,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973914134] [2020-10-27 01:21:43,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:21:43,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:43,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:21:43,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:21:43,059 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 30 states. [2020-10-27 01:21:44,259 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2020-10-27 01:21:45,258 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 118 [2020-10-27 01:21:46,624 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 127 [2020-10-27 01:21:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:47,725 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-27 01:21:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:21:47,726 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2020-10-27 01:21:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:47,728 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:21:47,728 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:21:47,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:21:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:21:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-27 01:21:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:21:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-27 01:21:47,739 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2020-10-27 01:21:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:47,739 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-27 01:21:47,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:21:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-27 01:21:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:21:47,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:47,740 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:47,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:21:47,740 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 251701605, now seen corresponding path program 18 times [2020-10-27 01:21:47,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:47,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652398144] [2020-10-27 01:21:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:48,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:52,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:52,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:21:52,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:52,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 01:21:52,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:21:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:21:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:21:52,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0