/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:29:46,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:29:46,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:29:46,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:29:46,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:29:46,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:29:46,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:29:46,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:29:46,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:29:46,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:29:46,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:29:46,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:29:46,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:29:46,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:29:46,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:29:46,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:29:46,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:29:46,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:29:46,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:29:46,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:29:46,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:29:46,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:29:46,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:29:46,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:29:46,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:29:46,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:29:46,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:29:46,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:29:46,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:29:46,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:29:46,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:29:46,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:29:46,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:29:46,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:29:46,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:29:46,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:29:46,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:29:46,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:29:46,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:29:46,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:29:46,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:29:46,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:29:46,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:29:46,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:29:46,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:29:46,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:29:46,586 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:29:46,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:29:46,587 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:29:46,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:29:46,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:29:46,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:29:46,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:29:46,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:29:46,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:29:46,590 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:29:46,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:29:46,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:29:46,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:29:46,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:29:46,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:29:46,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:29:46,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:29:46,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:29:46,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:29:46,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:29:46,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:29:46,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:29:46,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:29:46,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:29:46,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:29:46,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:29:47,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:29:47,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:29:47,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:29:47,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:29:47,073 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:29:47,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-10-28 14:29:47,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/837d5b7ea/438b22e2845541e58b78f7f10e716e2d/FLAG2932be295 [2020-10-28 14:29:47,765 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:29:47,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-10-28 14:29:47,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/837d5b7ea/438b22e2845541e58b78f7f10e716e2d/FLAG2932be295 [2020-10-28 14:29:48,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/837d5b7ea/438b22e2845541e58b78f7f10e716e2d [2020-10-28 14:29:48,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:29:48,069 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:29:48,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:48,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:29:48,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:29:48,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ee3921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48, skipping insertion in model container [2020-10-28 14:29:48,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:29:48,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:29:48,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:48,587 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:29:48,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:48,738 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:29:48,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48 WrapperNode [2020-10-28 14:29:48,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:48,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:29:48,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:29:48,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:29:48,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:29:48,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:29:48,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:29:48,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:29:48,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:29:48,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:29:48,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:29:48,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:29:48,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:29:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:29:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:29:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:29:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:29:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:29:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:29:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:29:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:29:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:29:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:29:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:29:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:29:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:29:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:29:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:29:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:29:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:29:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:29:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:29:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:29:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:29:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:29:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:29:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:29:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:29:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:29:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:29:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:29:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:29:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:29:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:29:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:29:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:29:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:29:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:29:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:29:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:29:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:29:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:29:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:29:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:29:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:29:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:29:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:29:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:29:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:29:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:29:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:29:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:29:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:29:48,906 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:29:48,907 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:29:48,907 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:29:48,907 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:29:48,907 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:29:48,907 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:29:48,907 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:29:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:29:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:29:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:29:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:29:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:29:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:29:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:29:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:29:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:29:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:29:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:29:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:29:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:29:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:29:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:29:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:29:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:29:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:29:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:29:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:29:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:29:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:29:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:29:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:29:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:29:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:29:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:29:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:29:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:29:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:29:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:29:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:29:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:29:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:29:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:29:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:29:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:29:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:29:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:29:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:29:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:29:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:29:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:29:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:29:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:29:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:29:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:29:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:29:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:29:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:29:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:29:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:29:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:29:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:29:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:29:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:29:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:29:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:29:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:29:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:29:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:29:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:29:49,619 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:29:49,620 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-28 14:29:49,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:49 BoogieIcfgContainer [2020-10-28 14:29:49,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:29:49,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:29:49,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:29:49,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:29:49,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:29:48" (1/3) ... [2020-10-28 14:29:49,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608f2663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:29:49, skipping insertion in model container [2020-10-28 14:29:49,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (2/3) ... [2020-10-28 14:29:49,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608f2663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:29:49, skipping insertion in model container [2020-10-28 14:29:49,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:49" (3/3) ... [2020-10-28 14:29:49,635 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-10-28 14:29:49,647 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:29:49,653 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:29:49,667 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:29:49,697 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:29:49,698 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:29:49,698 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:29:49,698 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:29:49,698 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:29:49,698 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:29:49,698 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:29:49,699 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:29:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-28 14:29:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:29:49,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:49,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:49,725 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:49,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash 444257067, now seen corresponding path program 1 times [2020-10-28 14:29:49,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:49,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232400868] [2020-10-28 14:29:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:29:50,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:50,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:29:50,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:50,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:29:50,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:50,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:50,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232400868] [2020-10-28 14:29:50,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:50,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:29:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410130875] [2020-10-28 14:29:50,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:29:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:29:50,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:29:50,452 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-10-28 14:29:50,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:50,638 INFO L93 Difference]: Finished difference Result 99 states and 172 transitions. [2020-10-28 14:29:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:29:50,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:29:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:50,650 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:29:50,650 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:29:50,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:29:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:29:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 14:29:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:29:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-28 14:29:50,703 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 12 [2020-10-28 14:29:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:50,704 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-28 14:29:50,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:29:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-28 14:29:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:29:50,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:50,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:50,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:29:50,705 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:50,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:50,706 INFO L82 PathProgramCache]: Analyzing trace with hash 571755276, now seen corresponding path program 1 times [2020-10-28 14:29:50,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:50,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332007727] [2020-10-28 14:29:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:29:50,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-28 14:29:50,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:50,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:50,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:29:50,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:51,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:51,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:51,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332007727] [2020-10-28 14:29:51,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:51,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235643089] [2020-10-28 14:29:51,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:51,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:51,024 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 5 states. [2020-10-28 14:29:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:51,298 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-28 14:29:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:29:51,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:29:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:51,300 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:29:51,301 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:29:51,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:29:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-28 14:29:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:29:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-28 14:29:51,311 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 13 [2020-10-28 14:29:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:51,311 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-28 14:29:51,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-28 14:29:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:29:51,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:51,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:51,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:29:51,313 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash 541512391, now seen corresponding path program 1 times [2020-10-28 14:29:51,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:51,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792220962] [2020-10-28 14:29:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:29:51,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 14:29:51,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:29:51,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:51,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:51,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792220962] [2020-10-28 14:29:51,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:51,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215155868] [2020-10-28 14:29:51,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:51,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:51,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:51,549 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-10-28 14:29:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:51,732 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-28 14:29:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:29:51,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 14:29:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:51,733 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:29:51,734 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:29:51,734 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 [2020-10-28 14:29:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:29:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 14:29:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:29:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-28 14:29:51,742 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2020-10-28 14:29:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:51,742 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-28 14:29:51,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-28 14:29:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:29:51,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:51,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:51,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:29:51,744 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash -38373523, now seen corresponding path program 1 times [2020-10-28 14:29:51,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:51,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866280757] [2020-10-28 14:29:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:29:51,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 14:29:51,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:51,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:51,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:29:51,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:51,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:51,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866280757] [2020-10-28 14:29:51,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:29:51,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446503894] [2020-10-28 14:29:51,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:29:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:29:51,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:51,975 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-10-28 14:29:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:52,229 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-28 14:29:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:52,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:29:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:52,230 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:29:52,231 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:29:52,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:29:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-10-28 14:29:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:29:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-28 14:29:52,240 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 16 [2020-10-28 14:29:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:52,241 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-28 14:29:52,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:29:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-28 14:29:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:29:52,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:52,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:52,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:29:52,242 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:52,243 INFO L82 PathProgramCache]: Analyzing trace with hash -575459649, now seen corresponding path program 1 times [2020-10-28 14:29:52,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:52,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122272288] [2020-10-28 14:29:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:29:52,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-28 14:29:52,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:52,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:29:52,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:29:52,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:52,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:52,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:52,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:52,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:52,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:52,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122272288] [2020-10-28 14:29:52,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:52,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:52,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782125325] [2020-10-28 14:29:52,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:52,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:52,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:52,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:52,503 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 5 states. [2020-10-28 14:29:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:52,699 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-28 14:29:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:29:52,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 14:29:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:52,701 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:29:52,701 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:29:52,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:29:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 14:29:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:29:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-28 14:29:52,708 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2020-10-28 14:29:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:52,709 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-28 14:29:52,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-28 14:29:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:29:52,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:52,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:52,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:29:52,710 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1021377268, now seen corresponding path program 1 times [2020-10-28 14:29:52,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:52,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393703225] [2020-10-28 14:29:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:29:52,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-28 14:29:52,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:29:52,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:52,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:52,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:52,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:52,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393703225] [2020-10-28 14:29:52,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:52,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:52,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029340791] [2020-10-28 14:29:52,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:52,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:52,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:52,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:52,966 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2020-10-28 14:29:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:53,102 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-28 14:29:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:53,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 14:29:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:53,104 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:29:53,104 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:29:53,104 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 [2020-10-28 14:29:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:29:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 14:29:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:29:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-28 14:29:53,115 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2020-10-28 14:29:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:53,116 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-28 14:29:53,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-28 14:29:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:29:53,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:53,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:53,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:29:53,119 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:53,119 INFO L82 PathProgramCache]: Analyzing trace with hash -605625927, now seen corresponding path program 1 times [2020-10-28 14:29:53,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:53,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099926685] [2020-10-28 14:29:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:29:53,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-28 14:29:53,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:29:53,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:53,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:53,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:53,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:53,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099926685] [2020-10-28 14:29:53,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:53,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:29:53,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874400574] [2020-10-28 14:29:53,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:29:53,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:53,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:29:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:53,602 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-10-28 14:29:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:53,887 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-28 14:29:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:53,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 14:29:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:53,889 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:29:53,889 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:29:53,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:29:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-28 14:29:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:29:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-28 14:29:53,901 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 20 [2020-10-28 14:29:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:53,901 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-28 14:29:53,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:29:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-28 14:29:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:29:53,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:53,906 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:53,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:29:53,906 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash 727972317, now seen corresponding path program 1 times [2020-10-28 14:29:53,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:53,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224303620] [2020-10-28 14:29:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:29:54,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:54,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-28 14:29:54,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:29:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:29:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:54,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:54,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:54,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:54,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:54,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:54,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224303620] [2020-10-28 14:29:54,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:54,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:29:54,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088461956] [2020-10-28 14:29:54,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:29:54,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:54,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:29:54,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:29:54,336 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2020-10-28 14:29:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:54,724 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-28 14:29:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:54,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-28 14:29:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:54,726 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:29:54,726 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 14:29:54,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:29:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 14:29:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 51. [2020-10-28 14:29:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 14:29:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-28 14:29:54,739 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 23 [2020-10-28 14:29:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:54,742 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-28 14:29:54,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:29:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-28 14:29:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:29:54,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:54,744 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:54,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:29:54,745 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash -645190955, now seen corresponding path program 1 times [2020-10-28 14:29:54,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:54,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031573320] [2020-10-28 14:29:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:29:54,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-28 14:29:54,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:54,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:54,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:29:54,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:54,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:54,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:54,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:54,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:54,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031573320] [2020-10-28 14:29:54,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:54,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:29:54,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744775144] [2020-10-28 14:29:54,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:29:54,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:54,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:29:54,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:54,985 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 6 states. [2020-10-28 14:29:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:55,270 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-28 14:29:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:55,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-28 14:29:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:55,273 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:29:55,273 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:29:55,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:29:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 14:29:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:29:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 14:29:55,283 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 26 [2020-10-28 14:29:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:55,288 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 14:29:55,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:29:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 14:29:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:29:55,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:55,289 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:55,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:29:55,289 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:55,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1402037848, now seen corresponding path program 1 times [2020-10-28 14:29:55,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:55,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581979572] [2020-10-28 14:29:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:29:55,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-28 14:29:55,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:55,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:55,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:29:55,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:55,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:55,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:29:55,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:55,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:55,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581979572] [2020-10-28 14:29:55,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:55,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:55,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075398124] [2020-10-28 14:29:55,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:55,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:55,795 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-10-28 14:29:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:56,170 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-28 14:29:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:29:56,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 14:29:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:56,172 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:29:56,172 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:29:56,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:29:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:29:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2020-10-28 14:29:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:29:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-28 14:29:56,183 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 27 [2020-10-28 14:29:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:56,184 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-28 14:29:56,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-28 14:29:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:29:56,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:56,188 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:56,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:29:56,188 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1203985706, now seen corresponding path program 1 times [2020-10-28 14:29:56,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:56,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658783008] [2020-10-28 14:29:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:56,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:56,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:56,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:29:56,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:56,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-28 14:29:56,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:56,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:56,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:56,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:56,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:29:56,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:56,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:56,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:56,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:56,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:56,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:56,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:56,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:56,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658783008] [2020-10-28 14:29:56,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:56,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:56,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777337438] [2020-10-28 14:29:56,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:56,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:56,679 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 8 states. [2020-10-28 14:29:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:57,022 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-28 14:29:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:29:57,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 14:29:57,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:57,023 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:29:57,023 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:29:57,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:29:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:29:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2020-10-28 14:29:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:29:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 14:29:57,034 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-10-28 14:29:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:57,035 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 14:29:57,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:57,035 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 14:29:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:29:57,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:57,037 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:57,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:29:57,040 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1358786164, now seen corresponding path program 1 times [2020-10-28 14:29:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:57,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797269530] [2020-10-28 14:29:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:57,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:57,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:29:57,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-28 14:29:57,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:57,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:57,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:57,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:29:57,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:29:57,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:57,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:57,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:57,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:57,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:57,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:57,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:57,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:57,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:57,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:57,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:57,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797269530] [2020-10-28 14:29:57,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:57,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:57,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919864543] [2020-10-28 14:29:57,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:57,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:57,897 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-28 14:29:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:58,290 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-28 14:29:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:29:58,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 14:29:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:58,292 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:29:58,292 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:29:58,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:29:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:29:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-10-28 14:29:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:29:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-28 14:29:58,308 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 31 [2020-10-28 14:29:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:58,308 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-28 14:29:58,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-28 14:29:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:29:58,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:58,314 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:58,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:29:58,315 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -446652170, now seen corresponding path program 1 times [2020-10-28 14:29:58,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:58,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575537120] [2020-10-28 14:29:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:58,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:29:59,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:59,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-28 14:29:59,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:59,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:59,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:29:59,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:59,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:59,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:59,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:59,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:59,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:59,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575537120] [2020-10-28 14:29:59,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:59,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:59,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515804083] [2020-10-28 14:29:59,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:59,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:59,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:59,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:59,514 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 8 states. [2020-10-28 14:29:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:59,911 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-28 14:29:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:29:59,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 14:29:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:59,912 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:29:59,913 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 14:29:59,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:29:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 14:29:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2020-10-28 14:29:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:29:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-28 14:29:59,920 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2020-10-28 14:29:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:59,921 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-28 14:29:59,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-28 14:29:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:29:59,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:59,922 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:59,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:29:59,922 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:59,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1448205022, now seen corresponding path program 1 times [2020-10-28 14:29:59,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:59,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661532111] [2020-10-28 14:29:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:59,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:00,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:30:00,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:00,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-28 14:30:00,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:00,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:00,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:00,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:00,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:30:00,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:00,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:00,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:00,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:00,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:00,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:00,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:00,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:00,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:00,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:00,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:00,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:00,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661532111] [2020-10-28 14:30:00,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:00,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:30:00,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311547280] [2020-10-28 14:30:00,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:00,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:00,838 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2020-10-28 14:30:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:01,330 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-28 14:30:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:01,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 14:30:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:01,333 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:30:01,333 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:30:01,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:30:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2020-10-28 14:30:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:30:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-28 14:30:01,348 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 34 [2020-10-28 14:30:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:01,348 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-28 14:30:01,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-28 14:30:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:30:01,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:01,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:01,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:30:01,350 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:01,350 INFO L82 PathProgramCache]: Analyzing trace with hash -695799998, now seen corresponding path program 1 times [2020-10-28 14:30:01,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:01,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205254419] [2020-10-28 14:30:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:01,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:01,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:01,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:30:01,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:01,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-28 14:30:01,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:01,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:01,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:01,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:01,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:30:01,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:02,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:02,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:02,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:02,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:02,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:02,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:02,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:02,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:02,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:02,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205254419] [2020-10-28 14:30:02,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:02,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:02,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142027660] [2020-10-28 14:30:02,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:02,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:02,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:02,064 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 9 states. [2020-10-28 14:30:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:02,867 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2020-10-28 14:30:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:02,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 14:30:02,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:02,869 INFO L225 Difference]: With dead ends: 106 [2020-10-28 14:30:02,869 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 14:30:02,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 14:30:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-10-28 14:30:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:30:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-28 14:30:02,879 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 34 [2020-10-28 14:30:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:02,880 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-28 14:30:02,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-28 14:30:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:30:02,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:02,881 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:02,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:30:02,882 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1510244636, now seen corresponding path program 1 times [2020-10-28 14:30:02,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:02,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730256297] [2020-10-28 14:30:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:02,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:02,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:04,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:30:04,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:04,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-28 14:30:04,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:04,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:30:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:04,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:04,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:04,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:04,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:04,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:04,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:04,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:04,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:04,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730256297] [2020-10-28 14:30:04,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:04,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:30:04,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886370977] [2020-10-28 14:30:04,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:04,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:04,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:04,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:04,513 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 8 states. [2020-10-28 14:30:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:04,883 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-10-28 14:30:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:30:04,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 14:30:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:04,885 INFO L225 Difference]: With dead ends: 96 [2020-10-28 14:30:04,885 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:30:04,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:30:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2020-10-28 14:30:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:30:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-28 14:30:04,897 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 34 [2020-10-28 14:30:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:04,898 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-28 14:30:04,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-28 14:30:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:30:04,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:04,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:04,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:30:04,900 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash -633760384, now seen corresponding path program 1 times [2020-10-28 14:30:04,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:04,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706034843] [2020-10-28 14:30:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:04,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:05,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:30:05,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:05,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-28 14:30:05,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:05,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:05,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:05,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:05,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:30:05,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:05,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:05,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:05,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:05,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:05,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:05,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:05,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:05,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:05,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:05,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:05,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:05,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706034843] [2020-10-28 14:30:05,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:05,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:05,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491378663] [2020-10-28 14:30:05,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:05,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:05,472 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 9 states. [2020-10-28 14:30:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:06,319 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2020-10-28 14:30:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:06,320 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 14:30:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:06,321 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:30:06,321 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 14:30:06,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 14:30:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 82. [2020-10-28 14:30:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:30:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-28 14:30:06,333 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 34 [2020-10-28 14:30:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:06,334 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-28 14:30:06,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-28 14:30:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:30:06,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:06,335 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:06,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:30:06,335 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1293216844, now seen corresponding path program 2 times [2020-10-28 14:30:06,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:06,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944728390] [2020-10-28 14:30:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:06,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:06,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:06,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:30:06,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-28 14:30:06,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:06,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:30:06,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:07,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:07,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:07,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:07,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:07,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:07,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:07,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:07,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:07,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:07,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:07,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:07,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:07,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944728390] [2020-10-28 14:30:07,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:07,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:07,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418397022] [2020-10-28 14:30:07,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:07,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:07,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:07,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:07,114 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 10 states. [2020-10-28 14:30:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:07,791 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-28 14:30:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:07,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-28 14:30:07,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:07,793 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:30:07,793 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:30:07,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:30:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:30:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2020-10-28 14:30:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:30:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-28 14:30:07,801 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 37 [2020-10-28 14:30:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:07,802 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-28 14:30:07,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-28 14:30:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:30:07,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:07,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:07,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:30:07,803 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:07,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2057975726, now seen corresponding path program 1 times [2020-10-28 14:30:07,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:07,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123745839] [2020-10-28 14:30:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:30:07,827 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:30:07,827 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:30:07,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:30:07,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:30:07 BoogieIcfgContainer [2020-10-28 14:30:07,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:30:07,854 INFO L168 Benchmark]: Toolchain (without parser) took 19790.24 ms. Allocated memory was 153.1 MB in the beginning and 336.6 MB in the end (delta: 183.5 MB). Free memory was 108.4 MB in the beginning and 252.9 MB in the end (delta: -144.5 MB). Peak memory consumption was 40.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:07,855 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory was 126.3 MB in the beginning and 126.2 MB in the end (delta: 94.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:30:07,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 667.04 ms. Allocated memory is still 153.1 MB. Free memory was 107.7 MB in the beginning and 124.4 MB in the end (delta: -16.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:07,856 INFO L168 Benchmark]: Boogie Preprocessor took 71.17 ms. Allocated memory is still 153.1 MB. Free memory was 124.4 MB in the beginning and 121.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:07,856 INFO L168 Benchmark]: RCFGBuilder took 813.77 ms. Allocated memory is still 153.1 MB. Free memory was 121.3 MB in the beginning and 128.1 MB in the end (delta: -6.7 MB). Peak memory consumption was 51.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:07,857 INFO L168 Benchmark]: TraceAbstraction took 18224.32 ms. Allocated memory was 153.1 MB in the beginning and 336.6 MB in the end (delta: 183.5 MB). Free memory was 127.6 MB in the beginning and 252.9 MB in the end (delta: -125.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:30:07,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory was 126.3 MB in the beginning and 126.2 MB in the end (delta: 94.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 667.04 ms. Allocated memory is still 153.1 MB. Free memory was 107.7 MB in the beginning and 124.4 MB in the end (delta: -16.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.17 ms. Allocated memory is still 153.1 MB. Free memory was 124.4 MB in the beginning and 121.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 813.77 ms. Allocated memory is still 153.1 MB. Free memory was 121.3 MB in the beginning and 128.1 MB in the end (delta: -6.7 MB). Peak memory consumption was 51.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18224.32 ms. Allocated memory was 153.1 MB in the beginning and 336.6 MB in the end (delta: 183.5 MB). Free memory was 127.6 MB in the beginning and 252.9 MB in the end (delta: -125.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) [L1000] null->prev = ((void*)0) [L1001] null->colour = BLACK [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null [L1005] list->prev = null [L1006] list->colour = BLACK [L1008] struct TSLL* end = list; [L1011] COND TRUE __VERIFIER_nondet_int() [L1014] end->next = malloc(sizeof(struct TSLL)) [L1015] EXPR end->next [L1015] end->next->prev = end [L1016] EXPR end->next [L1016] end = end->next [L1017] end->next = null [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end->colour = RED [L1026] end->next = malloc(sizeof(struct TSLL)) [L1027] EXPR end->next [L1027] end->next->prev = end [L1028] EXPR end->next [L1028] end = end->next [L1029] end->next = null [L1030] end->colour = BLACK [L1032] EXPR end->colour [L1032] COND FALSE !(!(BLACK == end->colour)) [L1033] EXPR end->next [L1033] COND FALSE !(!(null == end->next)) [L1034] COND FALSE !(!(null != end)) [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list [L1041] COND FALSE !(!(null != end)) [L1042] EXPR end->colour [L1042] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE null != end [L1045] EXPR end->colour [L1045] COND FALSE !(RED == end->colour) [L1052] EXPR end->next [L1052] end = end->next [L1043] COND TRUE null != end [L1045] EXPR end->colour [L1045] COND TRUE RED == end->colour [L1047] EXPR end->next [L1047] end = end->next [L1048] COND FALSE !(!(null != end)) [L1049] EXPR end->colour [L1049] COND TRUE !(BLACK != end->colour) [L1049] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-rb-sentinel-1.c", 14, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.1s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 580 SDtfs, 801 SDslu, 1452 SDs, 0 SdLazy, 2337 SolverSat, 276 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 239 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 486 NumberOfCodeBlocks, 486 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 431 ConstructedInterpolants, 0 QuantifiedInterpolants, 135664 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 7 PerfectInterpolantSequences, 1/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...