/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:24:24,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:24:24,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:24:24,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:24:24,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:24:24,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:24:24,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:24:24,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:24:24,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:24:24,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:24:24,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:24:24,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:24:24,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:24:24,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:24:24,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:24:24,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:24:24,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:24:24,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:24:24,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:24:24,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:24:24,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:24:24,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:24:24,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:24:24,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:24:24,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:24:24,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:24:24,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:24:24,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:24:24,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:24:24,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:24:24,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:24:24,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:24:24,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:24:24,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:24:24,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:24:24,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:24:24,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:24:24,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:24:24,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:24:24,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:24:24,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:24:24,270 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 [2020-10-29 09:24:24,321 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:24:24,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:24:24,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:24:24,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:24:24,326 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:24:24,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:24:24,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:24:24,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:24:24,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:24:24,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:24:24,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:24:24,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:24:24,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:24:24,329 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:24:24,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:24:24,329 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:24:24,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:24:24,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:24:24,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:24:24,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:24:24,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:24:24,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:24:24,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:24:24,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:24:24,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:24:24,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:24:24,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:24:24,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:24:24,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:24:24,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:24:24,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:24:24,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:24:24,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:24:24,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:24:24,822 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:24:24,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-10-29 09:24:24,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/912edfd89/661ce412305148fb8581969786708240/FLAG383f3698f [2020-10-29 09:24:25,677 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:24:25,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-10-29 09:24:25,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/912edfd89/661ce412305148fb8581969786708240/FLAG383f3698f [2020-10-29 09:24:25,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/912edfd89/661ce412305148fb8581969786708240 [2020-10-29 09:24:25,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:24:25,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:24:25,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:25,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:24:25,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:24:25,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:25" (1/1) ... [2020-10-29 09:24:25,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5146635b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:25, skipping insertion in model container [2020-10-29 09:24:25,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:25" (1/1) ... [2020-10-29 09:24:25,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:24:26,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:24:26,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:26,424 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:24:26,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:26,542 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:24:26,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26 WrapperNode [2020-10-29 09:24:26,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:26,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:24:26,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:24:26,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:24:26,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:24:26,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:24:26,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:24:26,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:24:26,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (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 [2020-10-29 09:24:26,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:24:26,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:24:26,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:24:26,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:24:26,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:24:26,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-29 09:24:26,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-29 09:24:26,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-29 09:24:26,763 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-29 09:24:26,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:24:26,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:24:26,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:24:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:24:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:24:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:24:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:24:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:24:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:24:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:24:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:24:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:24:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:24:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:24:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:24:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:24:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:24:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:24:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:24:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:24:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:24:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:24:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:24:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:24:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:24:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:24:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-29 09:24:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-29 09:24:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-29 09:24:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:24:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:24:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:24:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:24:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:24:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:24:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:24:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:24:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:24:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:24:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:24:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:24:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:24:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:24:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:24:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:24:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:24:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:24:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:24:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:24:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:24:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:24:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:24:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:24:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:24:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:24:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:24:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:24:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:24:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:24:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:24:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:24:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:24:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:24:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:24:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:24:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:24:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:24:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:24:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:24:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:24:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:24:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:24:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:24:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:24:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:24:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:24:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:24:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:24:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:24:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:24:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:24:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:24:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:24:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:24:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:24:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:24:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:24:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:24:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:24:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:24:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:24:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:24:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:24:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:24:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:24:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:24:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:24:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:24:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:24:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:24:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:24:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:24:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-29 09:24:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:24:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:24:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:24:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:24:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:24:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:24:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:24:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:24:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:24:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:24:27,118 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-29 09:24:27,376 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:24:27,376 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 09:24:27,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:27 BoogieIcfgContainer [2020-10-29 09:24:27,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:24:27,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:24:27,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:24:27,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:24:27,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:24:25" (1/3) ... [2020-10-29 09:24:27,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4426e727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:27, skipping insertion in model container [2020-10-29 09:24:27,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (2/3) ... [2020-10-29 09:24:27,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4426e727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:27, skipping insertion in model container [2020-10-29 09:24:27,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:27" (3/3) ... [2020-10-29 09:24:27,388 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-10-29 09:24:27,406 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:24:27,412 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:24:27,429 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:24:27,464 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:24:27,464 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:24:27,464 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:24:27,464 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:24:27,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:24:27,464 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:24:27,464 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:24:27,465 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:24:27,491 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-29 09:24:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:24:27,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:27,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:27,502 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:27,517 INFO L82 PathProgramCache]: Analyzing trace with hash 620344659, now seen corresponding path program 1 times [2020-10-29 09:24:27,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:27,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45588936] [2020-10-29 09:24:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:27,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:28,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:28,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:28,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:24:28,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:24:28,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-29 09:24:28,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:28,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:28,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:28,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:24:28,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:24:28,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:28,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:28,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:28,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:28,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 09:24:28,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:28,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:28,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45588936] [2020-10-29 09:24:28,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:28,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:24:28,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635322457] [2020-10-29 09:24:28,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:28,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:28,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:28,560 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-10-29 09:24:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:28,906 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-10-29 09:24:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:28,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-29 09:24:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:28,918 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:24:28,919 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:24:28,923 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 [2020-10-29 09:24:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:24:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-29 09:24:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:24:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:24:28,968 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 18 [2020-10-29 09:24:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:28,969 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:24:28,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:24:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:24:28,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:28,971 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] [2020-10-29 09:24:28,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:24:28,971 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:28,972 INFO L82 PathProgramCache]: Analyzing trace with hash -511611450, now seen corresponding path program 1 times [2020-10-29 09:24:28,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:28,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984227934] [2020-10-29 09:24:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:29,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:29,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:24:29,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:29,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-29 09:24:29,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:29,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:24:29,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:29,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:29,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:29,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:29,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:29,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:24:29,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:29,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:29,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:29,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984227934] [2020-10-29 09:24:29,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:29,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:24:29,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452483980] [2020-10-29 09:24:29,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:29,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:29,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:29,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:29,224 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-29 09:24:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:29,396 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-29 09:24:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:29,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-29 09:24:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:29,400 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:24:29,400 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:24:29,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:24:29,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:24:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-29 09:24:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:24:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-29 09:24:29,420 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2020-10-29 09:24:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:29,423 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-29 09:24:29,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-29 09:24:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:24:29,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:29,425 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] [2020-10-29 09:24:29,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:24:29,425 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:29,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash 680437702, now seen corresponding path program 1 times [2020-10-29 09:24:29,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:29,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897561942] [2020-10-29 09:24:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:29,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:29,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:24:29,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:29,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-29 09:24:29,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:29,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:29,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:29,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:29,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:24:29,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:29,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:29,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:29,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:29,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:29,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:24:29,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:29,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:29,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:29,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897561942] [2020-10-29 09:24:29,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:29,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:24:29,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316403459] [2020-10-29 09:24:29,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:29,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:29,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:29,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:29,703 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-10-29 09:24:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:29,881 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-29 09:24:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:29,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-29 09:24:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:29,892 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:24:29,892 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:24:29,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:24:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:24:29,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-29 09:24:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:24:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-29 09:24:29,910 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-29 09:24:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:29,911 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-29 09:24:29,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-29 09:24:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:24:29,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:29,912 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] [2020-10-29 09:24:29,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:24:29,915 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 134346418, now seen corresponding path program 1 times [2020-10-29 09:24:29,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:29,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791121868] [2020-10-29 09:24:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:30,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:24:30,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-29 09:24:30,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:30,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:24:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:24:30,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:30,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:30,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:30,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:30,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:30,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:30,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:30,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:30,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:30,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:30,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:30,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791121868] [2020-10-29 09:24:30,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:30,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:24:30,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7468689] [2020-10-29 09:24:30,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:24:30,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:30,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:24:30,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:24:30,536 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-29 09:24:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:30,781 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-29 09:24:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:24:30,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:24:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:30,783 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:24:30,784 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:24:30,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:24:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-29 09:24:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:24:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-29 09:24:30,796 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2020-10-29 09:24:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:30,796 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-29 09:24:30,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:24:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-29 09:24:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:24:30,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:30,798 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] [2020-10-29 09:24:30,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:24:30,798 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash 934657394, now seen corresponding path program 1 times [2020-10-29 09:24:30,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:30,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783729689] [2020-10-29 09:24:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:30,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:31,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:31,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:24:31,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:31,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-29 09:24:31,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:31,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:31,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:24:31,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:31,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:24:31,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:31,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:31,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:31,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:31,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:31,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:31,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:31,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:31,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:31,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:31,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:31,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:31,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:31,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783729689] [2020-10-29 09:24:31,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:31,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:24:31,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364696656] [2020-10-29 09:24:31,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:24:31,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:24:31,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:24:31,261 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-10-29 09:24:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:31,583 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-29 09:24:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:24:31,587 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:24:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:31,588 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:24:31,588 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:24:31,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:24:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-10-29 09:24:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:24:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-29 09:24:31,603 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2020-10-29 09:24:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:31,604 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-29 09:24:31,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:24:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-29 09:24:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:24:31,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:31,605 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] [2020-10-29 09:24:31,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:24:31,606 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:31,610 INFO L82 PathProgramCache]: Analyzing trace with hash 965245677, now seen corresponding path program 1 times [2020-10-29 09:24:31,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:31,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842598127] [2020-10-29 09:24:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:31,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:31,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:31,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:24:31,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:31,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-29 09:24:31,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:31,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:31,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:31,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:31,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:24:31,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:32,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:32,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:32,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:32,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:32,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:32,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:32,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:32,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:32,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:32,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:32,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:32,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:32,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842598127] [2020-10-29 09:24:32,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:32,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:32,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339645192] [2020-10-29 09:24:32,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:32,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:32,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:32,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:32,082 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 10 states. [2020-10-29 09:24:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:32,466 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-29 09:24:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:32,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 09:24:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:32,468 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:24:32,468 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:24:32,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:24:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-29 09:24:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:24:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-29 09:24:32,476 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 28 [2020-10-29 09:24:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:32,476 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-29 09:24:32,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-29 09:24:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:32,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:32,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:32,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:24:32,479 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash -596532632, now seen corresponding path program 1 times [2020-10-29 09:24:32,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:32,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396811546] [2020-10-29 09:24:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:32,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:32,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:32,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-29 09:24:32,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:32,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:32,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:32,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:32,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:32,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:32,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:32,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:24:32,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:32,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:32,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:32,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:32,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:32,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:32,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396811546] [2020-10-29 09:24:32,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:32,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:32,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303195580] [2020-10-29 09:24:32,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:32,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:32,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:32,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:32,883 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 10 states. [2020-10-29 09:24:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:33,236 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-29 09:24:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:33,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:24:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:33,238 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:24:33,238 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:24:33,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:24:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-29 09:24:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:24:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-29 09:24:33,246 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-29 09:24:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:33,246 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-29 09:24:33,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-29 09:24:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:33,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:33,248 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:33,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:24:33,248 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:33,249 INFO L82 PathProgramCache]: Analyzing trace with hash 595516520, now seen corresponding path program 2 times [2020-10-29 09:24:33,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:33,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734529410] [2020-10-29 09:24:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:33,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:33,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:33,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:33,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:33,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-29 09:24:33,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:33,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:33,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:33,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:33,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:24:33,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:33,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:33,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:33,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:33,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:33,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:24:33,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:33,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:33,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734529410] [2020-10-29 09:24:33,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:33,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:33,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248892561] [2020-10-29 09:24:33,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:33,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:33,645 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-10-29 09:24:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:33,984 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-29 09:24:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:33,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:24:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:33,986 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:24:33,986 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:24:33,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:24:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-29 09:24:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:24:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-29 09:24:33,992 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 30 [2020-10-29 09:24:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:33,993 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-29 09:24:33,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-29 09:24:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:33,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:33,994 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] [2020-10-29 09:24:33,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:24:33,994 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1043096551, now seen corresponding path program 2 times [2020-10-29 09:24:33,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:33,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152342960] [2020-10-29 09:24:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:34,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:34,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:34,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:34,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:34,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-29 09:24:34,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:34,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:34,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:24:34,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:34,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:34,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:34,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:34,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:34,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:34,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:34,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:34,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:34,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:34,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:34,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:34,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:34,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152342960] [2020-10-29 09:24:34,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:34,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:24:34,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667695180] [2020-10-29 09:24:34,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:24:34,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:24:34,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:24:34,392 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 11 states. [2020-10-29 09:24:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:34,663 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-29 09:24:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:34,664 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:24:34,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:34,665 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:24:34,665 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:24:34,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:24:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-29 09:24:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:24:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-29 09:24:34,672 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 30 [2020-10-29 09:24:34,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:34,672 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-29 09:24:34,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:24:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-29 09:24:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:34,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:34,674 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] [2020-10-29 09:24:34,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:24:34,674 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:34,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:34,674 INFO L82 PathProgramCache]: Analyzing trace with hash -792329511, now seen corresponding path program 1 times [2020-10-29 09:24:34,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:34,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443845794] [2020-10-29 09:24:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:34,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:34,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:34,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:34,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:34,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-29 09:24:34,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:34,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:24:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:24:34,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:35,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:35,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:35,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:35,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:35,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:35,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:35,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:35,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:35,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:35,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:35,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443845794] [2020-10-29 09:24:35,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:35,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:24:35,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540326226] [2020-10-29 09:24:35,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:24:35,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:24:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:24:35,040 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 11 states. [2020-10-29 09:24:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:35,335 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-29 09:24:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:24:35,335 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:24:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:35,336 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:24:35,336 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:24:35,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:24:35,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:24:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 09:24:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:24:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-29 09:24:35,343 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 30 [2020-10-29 09:24:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:35,344 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-29 09:24:35,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:24:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-29 09:24:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:24:35,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:35,345 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:35,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:24:35,345 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:35,346 INFO L82 PathProgramCache]: Analyzing trace with hash -981048684, now seen corresponding path program 3 times [2020-10-29 09:24:35,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:35,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492736817] [2020-10-29 09:24:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:35,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:35,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:24:35,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:35,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-29 09:24:35,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:35,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:35,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:24:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:35,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:35,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:35,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:35,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:35,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:35,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:35,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:35,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:35,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:35,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:35,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:35,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:35,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492736817] [2020-10-29 09:24:35,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:35,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:24:35,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191142583] [2020-10-29 09:24:35,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:24:35,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:24:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:24:35,862 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 12 states. [2020-10-29 09:24:36,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:36,656 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-10-29 09:24:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:36,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:24:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:36,658 INFO L225 Difference]: With dead ends: 89 [2020-10-29 09:24:36,658 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:24:36,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:24:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:24:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-29 09:24:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:24:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-29 09:24:36,668 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 32 [2020-10-29 09:24:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:36,668 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-29 09:24:36,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:24:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-29 09:24:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:24:36,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:36,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:36,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:24:36,671 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1704140972, now seen corresponding path program 1 times [2020-10-29 09:24:36,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:36,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648469160] [2020-10-29 09:24:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:24:36,691 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:24:36,692 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:24:36,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:24:36,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:24:36 BoogieIcfgContainer [2020-10-29 09:24:36,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:24:36,717 INFO L168 Benchmark]: Toolchain (without parser) took 10771.98 ms. Allocated memory was 169.9 MB in the beginning and 245.4 MB in the end (delta: 75.5 MB). Free memory was 144.7 MB in the beginning and 168.9 MB in the end (delta: -24.3 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:24:36,717 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 100.3 MB in the end (delta: 94.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:24:36,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 592.59 ms. Allocated memory is still 169.9 MB. Free memory was 143.9 MB in the beginning and 121.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:24:36,719 INFO L168 Benchmark]: Boogie Preprocessor took 91.08 ms. Allocated memory is still 169.9 MB. Free memory was 121.9 MB in the beginning and 119.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:24:36,720 INFO L168 Benchmark]: RCFGBuilder took 742.85 ms. Allocated memory is still 169.9 MB. Free memory was 119.2 MB in the beginning and 111.7 MB in the end (delta: 7.5 MB). Peak memory consumption was 7.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:24:36,721 INFO L168 Benchmark]: TraceAbstraction took 9333.66 ms. Allocated memory was 169.9 MB in the beginning and 245.4 MB in the end (delta: 75.5 MB). Free memory was 111.1 MB in the beginning and 168.9 MB in the end (delta: -57.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:24:36,724 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 100.3 MB in the end (delta: 94.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 592.59 ms. Allocated memory is still 169.9 MB. Free memory was 143.9 MB in the beginning and 121.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 91.08 ms. Allocated memory is still 169.9 MB. Free memory was 121.9 MB in the beginning and 119.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 742.85 ms. Allocated memory is still 169.9 MB. Free memory was 119.2 MB in the beginning and 111.7 MB in the end (delta: 7.5 MB). Peak memory consumption was 7.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9333.66 ms. Allocated memory was 169.9 MB in the beginning and 245.4 MB in the end (delta: 75.5 MB). Free memory was 111.1 MB in the beginning and 168.9 MB in the end (delta: -57.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h [L554] COND TRUE p->h == 1 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L557] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.2s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 237 SDtfs, 497 SDslu, 955 SDs, 0 SdLazy, 1800 SolverSat, 231 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=11, 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, 11 MinimizatonAttempts, 115 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 330 NumberOfCodeBlocks, 330 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 72709 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 10/48 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...