/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/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:10:26,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:10:26,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:10:26,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:10:26,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:10:26,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:10:26,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:10:26,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:10:26,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:10:26,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:10:26,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:10:26,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:10:26,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:10:26,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:10:26,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:10:26,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:10:26,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:10:26,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:10:26,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:10:26,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:10:26,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:10:26,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:10:26,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:10:26,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:10:26,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:10:26,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:10:26,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:10:26,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:10:26,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:10:26,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:10:26,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:10:26,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:10:26,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:10:26,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:10:26,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:10:26,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:10:26,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:10:26,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:10:26,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:10:26,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:10:26,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:10:26,221 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 09:10:26,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:10:26,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:10:26,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:10:26,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:10:26,252 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:10:26,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:10:26,253 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:10:26,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:10:26,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:10:26,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:10:26,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:10:26,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:10:26,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:10:26,255 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:10:26,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:10:26,255 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:10:26,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:10:26,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:10:26,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:10:26,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:10:26,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:10:26,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:26,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:10:26,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:10:26,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:10:26,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:10:26,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:10:26,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:10:26,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:10:26,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:10:26,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:10:26,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:10:26,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:10:26,674 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:10:26,674 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:10:26,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-29 09:10:26,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30acef3af/0c08d3a2419447909d8228d1200d3a8b/FLAG2c67dddff [2020-10-29 09:10:27,511 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:10:27,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-29 09:10:27,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30acef3af/0c08d3a2419447909d8228d1200d3a8b/FLAG2c67dddff [2020-10-29 09:10:27,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30acef3af/0c08d3a2419447909d8228d1200d3a8b [2020-10-29 09:10:27,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:10:27,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:10:27,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:27,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:10:27,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:10:27,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:27" (1/1) ... [2020-10-29 09:10:27,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ebe115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:27, skipping insertion in model container [2020-10-29 09:10:27,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:27" (1/1) ... [2020-10-29 09:10:27,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:10:27,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:10:28,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:28,182 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:10:28,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:28,348 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:10:28,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28 WrapperNode [2020-10-29 09:10:28,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:28,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:10:28,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:10:28,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:10:28,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (1/1) ... [2020-10-29 09:10:28,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (1/1) ... [2020-10-29 09:10:28,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (1/1) ... [2020-10-29 09:10:28,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (1/1) ... [2020-10-29 09:10:28,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (1/1) ... [2020-10-29 09:10:28,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (1/1) ... [2020-10-29 09:10:28,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (1/1) ... [2020-10-29 09:10:28,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:10:28,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:10:28,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:10:28,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:10:28,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (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 09:10:28,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:10:28,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:10:28,536 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:10:28,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:10:28,537 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:10:28,538 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:10:28,538 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:10:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:10:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:10:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:10:28,541 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:10:28,541 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:10:28,541 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:10:28,541 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:10:28,541 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:10:28,543 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:10:28,543 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:10:28,543 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:10:28,543 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:10:28,543 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:10:28,544 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:10:28,544 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:10:28,545 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:10:28,545 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:10:28,545 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:10:28,545 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:10:28,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:10:28,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:10:28,550 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:10:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:10:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:10:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:10:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:10:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:10:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:10:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:10:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:10:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:10:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:10:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:10:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:10:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:10:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:10:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:10:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:10:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:10:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:10:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:10:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:10:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:10:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:10:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:10:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:10:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:10:28,555 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:10:28,555 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:10:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:10:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:10:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:10:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:10:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:10:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:10:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:10:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:10:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:10:28,558 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:10:28,558 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:10:28,558 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:10:28,558 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:10:28,558 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:10:28,559 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:10:28,559 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:10:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:10:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:10:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:10:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:10:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:10:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:10:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:10:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:10:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:10:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:10:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:10:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:10:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:10:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:10:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:10:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:10:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:10:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:10:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:10:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:10:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:10:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:10:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:10:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:10:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:10:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:10:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:10:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:10:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:10:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:10:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:10:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:10:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:10:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:10:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:10:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:10:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:10:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:10:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:10:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:10:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:10:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:10:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:10:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:10:28,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:10:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:10:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:10:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:10:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:10:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:10:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:10:29,382 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:10:29,382 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-29 09:10:29,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:29 BoogieIcfgContainer [2020-10-29 09:10:29,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:10:29,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:10:29,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:10:29,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:10:29,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:10:27" (1/3) ... [2020-10-29 09:10:29,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c868ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:29, skipping insertion in model container [2020-10-29 09:10:29,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:28" (2/3) ... [2020-10-29 09:10:29,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c868ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:29, skipping insertion in model container [2020-10-29 09:10:29,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:29" (3/3) ... [2020-10-29 09:10:29,403 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-10-29 09:10:29,417 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:10:29,427 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:10:29,443 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:10:29,483 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:10:29,483 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:10:29,483 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:10:29,484 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:10:29,491 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:10:29,491 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:10:29,492 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:10:29,492 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:10:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-10-29 09:10:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-29 09:10:29,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:29,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:29,530 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:29,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1010618624, now seen corresponding path program 1 times [2020-10-29 09:10:29,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:29,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336080497] [2020-10-29 09:10:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:29,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:29,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 09:10:29,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:29,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-29 09:10:29,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:29,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:29,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:29,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:29,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:10:29,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:10:30,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:30,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:30,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:30,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:30,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 09:10:30,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:30,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:30,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:30,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:30,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:30,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:30,170 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 09:10:30,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336080497] [2020-10-29 09:10:30,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:30,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:30,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626215819] [2020-10-29 09:10:30,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:30,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:30,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:30,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:30,199 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2020-10-29 09:10:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:30,505 INFO L93 Difference]: Finished difference Result 181 states and 328 transitions. [2020-10-29 09:10:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:30,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-29 09:10:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:30,517 INFO L225 Difference]: With dead ends: 181 [2020-10-29 09:10:30,518 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:10:30,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:10:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-10-29 09:10:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:10:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-29 09:10:30,573 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 10 [2020-10-29 09:10:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:30,574 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-29 09:10:30,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-29 09:10:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:10:30,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:30,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:30,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:10:30,575 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash 742122061, now seen corresponding path program 1 times [2020-10-29 09:10:30,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:30,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254796509] [2020-10-29 09:10:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:30,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:30,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:10:30,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:30,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-29 09:10:30,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:30,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:30,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:30,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:10:30,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:10:30,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:30,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:30,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:30,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:30,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:30,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:10:30,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:30,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:30,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:30,820 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 09:10:30,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254796509] [2020-10-29 09:10:30,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:30,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:30,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30220438] [2020-10-29 09:10:30,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:30,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:30,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:30,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:30,825 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 5 states. [2020-10-29 09:10:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:31,190 INFO L93 Difference]: Finished difference Result 181 states and 237 transitions. [2020-10-29 09:10:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:31,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-29 09:10:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:31,192 INFO L225 Difference]: With dead ends: 181 [2020-10-29 09:10:31,192 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:10:31,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:10:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2020-10-29 09:10:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:10:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-10-29 09:10:31,210 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 16 [2020-10-29 09:10:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:31,210 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-10-29 09:10:31,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-10-29 09:10:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:10:31,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:31,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:31,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:10:31,212 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:31,212 INFO L82 PathProgramCache]: Analyzing trace with hash 743969103, now seen corresponding path program 1 times [2020-10-29 09:10:31,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:31,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336523446] [2020-10-29 09:10:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:31,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-29 09:10:31,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:31,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:10:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:10:31,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:31,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:31,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:31,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:31,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:10:31,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:31,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:31,518 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 09:10:31,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336523446] [2020-10-29 09:10:31,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:31,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:31,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732518402] [2020-10-29 09:10:31,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:31,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:31,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:31,522 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 5 states. [2020-10-29 09:10:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:31,817 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2020-10-29 09:10:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:31,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-29 09:10:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:31,819 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:10:31,819 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:10:31,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:10:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 76. [2020-10-29 09:10:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:10:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-10-29 09:10:31,831 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 16 [2020-10-29 09:10:31,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:31,831 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-10-29 09:10:31,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-10-29 09:10:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:10:31,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:31,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:31,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:10:31,832 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:31,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1775990831, now seen corresponding path program 1 times [2020-10-29 09:10:31,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:31,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156599022] [2020-10-29 09:10:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:10:32,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:32,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-29 09:10:32,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:10:32,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:32,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:32,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:32,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:10:32,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:32,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:32,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:32,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:32,277 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 09:10:32,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156599022] [2020-10-29 09:10:32,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:32,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078739067] [2020-10-29 09:10:32,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:32,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:32,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:32,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:32,279 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 6 states. [2020-10-29 09:10:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:32,729 INFO L93 Difference]: Finished difference Result 203 states and 263 transitions. [2020-10-29 09:10:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:32,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-29 09:10:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:32,732 INFO L225 Difference]: With dead ends: 203 [2020-10-29 09:10:32,732 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 09:10:32,737 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 09:10:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 09:10:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 74. [2020-10-29 09:10:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:10:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-10-29 09:10:32,761 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 16 [2020-10-29 09:10:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:32,762 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-10-29 09:10:32,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-10-29 09:10:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:10:32,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:32,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:32,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:10:32,766 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1017080340, now seen corresponding path program 1 times [2020-10-29 09:10:32,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:32,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604001467] [2020-10-29 09:10:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:32,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:10:32,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:32,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-29 09:10:32,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:10:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:10:32,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:32,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:32,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:32,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:32,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:32,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:32,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:32,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:32,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:32,890 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 09:10:32,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604001467] [2020-10-29 09:10:32,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:32,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:32,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107758610] [2020-10-29 09:10:32,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:32,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:32,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:32,892 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 4 states. [2020-10-29 09:10:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:33,075 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-10-29 09:10:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:33,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:10:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:33,077 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:10:33,077 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:10:33,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:10:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-29 09:10:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:10:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2020-10-29 09:10:33,105 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 21 [2020-10-29 09:10:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:33,105 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2020-10-29 09:10:33,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2020-10-29 09:10:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:10:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:33,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:33,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:10:33,107 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1468552923, now seen corresponding path program 1 times [2020-10-29 09:10:33,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:33,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846524872] [2020-10-29 09:10:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:10:33,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:33,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-29 09:10:33,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:33,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:33,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:33,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:33,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:33,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:33,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:33,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:33,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,319 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 09:10:33,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846524872] [2020-10-29 09:10:33,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:33,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:33,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858411251] [2020-10-29 09:10:33,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:33,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:33,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:33,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:33,322 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 5 states. [2020-10-29 09:10:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:33,562 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2020-10-29 09:10:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:33,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-29 09:10:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:33,564 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:10:33,564 INFO L226 Difference]: Without dead ends: 106 [2020-10-29 09:10:33,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-29 09:10:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-29 09:10:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:10:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-10-29 09:10:33,572 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 22 [2020-10-29 09:10:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:33,573 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-10-29 09:10:33,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-10-29 09:10:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:10:33,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:33,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:33,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:10:33,574 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:33,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:33,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1343578289, now seen corresponding path program 1 times [2020-10-29 09:10:33,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:33,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923192646] [2020-10-29 09:10:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:10:33,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 09:10:33,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 09:10:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:10:33,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:33,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:33,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:33,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,680 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 09:10:33,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923192646] [2020-10-29 09:10:33,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:33,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:33,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187167848] [2020-10-29 09:10:33,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:33,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:33,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:33,683 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 4 states. [2020-10-29 09:10:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:33,857 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2020-10-29 09:10:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:33,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-29 09:10:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:33,858 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:10:33,858 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:10:33,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:10:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-29 09:10:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:10:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-10-29 09:10:33,871 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 26 [2020-10-29 09:10:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:33,872 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-10-29 09:10:33,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-10-29 09:10:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:33,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:33,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:33,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:10:33,876 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:33,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:33,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1311961699, now seen corresponding path program 1 times [2020-10-29 09:10:33,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:33,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695923927] [2020-10-29 09:10:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:34,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:34,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:34,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-29 09:10:34,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:34,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:10:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:10:34,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:34,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:34,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:34,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:34,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:34,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:34,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:34,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:34,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:34,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:34,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:34,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:34,589 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 09:10:34,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695923927] [2020-10-29 09:10:34,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:34,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:34,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800176732] [2020-10-29 09:10:34,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:34,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:34,592 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 6 states. [2020-10-29 09:10:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:35,048 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2020-10-29 09:10:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:35,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-29 09:10:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:35,052 INFO L225 Difference]: With dead ends: 172 [2020-10-29 09:10:35,052 INFO L226 Difference]: Without dead ends: 132 [2020-10-29 09:10:35,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-29 09:10:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 84. [2020-10-29 09:10:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:10:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-29 09:10:35,068 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 27 [2020-10-29 09:10:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:35,070 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-29 09:10:35,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-29 09:10:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:35,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:35,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:35,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:10:35,073 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2009929245, now seen corresponding path program 1 times [2020-10-29 09:10:35,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:35,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315635696] [2020-10-29 09:10:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:35,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:35,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-29 09:10:35,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:35,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:35,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:35,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:35,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:35,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:35,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,899 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 09:10:35,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315635696] [2020-10-29 09:10:35,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:35,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:10:35,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153921520] [2020-10-29 09:10:35,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:35,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:35,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:35,901 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-10-29 09:10:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:36,487 INFO L93 Difference]: Finished difference Result 221 states and 282 transitions. [2020-10-29 09:10:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:36,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-29 09:10:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:36,489 INFO L225 Difference]: With dead ends: 221 [2020-10-29 09:10:36,489 INFO L226 Difference]: Without dead ends: 181 [2020-10-29 09:10:36,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-29 09:10:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 93. [2020-10-29 09:10:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:10:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-10-29 09:10:36,501 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 27 [2020-10-29 09:10:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:36,501 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-10-29 09:10:36,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-10-29 09:10:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:10:36,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:36,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:36,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:10:36,503 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:36,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:36,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1216707632, now seen corresponding path program 1 times [2020-10-29 09:10:36,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:36,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127171015] [2020-10-29 09:10:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:10:36,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:36,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-29 09:10:36,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:36,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:36,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:36,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:36,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:36,774 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 09:10:36,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127171015] [2020-10-29 09:10:36,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:36,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:36,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396904836] [2020-10-29 09:10:36,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:36,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:36,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:36,777 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 6 states. [2020-10-29 09:10:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:37,086 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2020-10-29 09:10:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:37,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-29 09:10:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:37,088 INFO L225 Difference]: With dead ends: 158 [2020-10-29 09:10:37,088 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 09:10:37,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 09:10:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-10-29 09:10:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2020-10-29 09:10:37,098 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 29 [2020-10-29 09:10:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:37,099 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2020-10-29 09:10:37,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2020-10-29 09:10:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:10:37,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:37,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:37,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:10:37,100 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1305099344, now seen corresponding path program 1 times [2020-10-29 09:10:37,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:37,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257917234] [2020-10-29 09:10:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:37,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:37,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:10:37,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:37,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-29 09:10:37,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:37,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:37,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:37,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 09:10:37,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:10:37,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:37,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:37,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:37,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:37,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:37,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:37,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:37,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:37,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:37,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:37,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:37,316 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 09:10:37,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257917234] [2020-10-29 09:10:37,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:37,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:37,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513877924] [2020-10-29 09:10:37,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:37,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:37,319 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand 5 states. [2020-10-29 09:10:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:37,559 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-29 09:10:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:37,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-29 09:10:37,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:37,562 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:10:37,563 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 09:10:37,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 09:10:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-10-29 09:10:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:10:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-10-29 09:10:37,572 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2020-10-29 09:10:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:37,573 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-10-29 09:10:37,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-10-29 09:10:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:37,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:37,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:37,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:10:37,575 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:37,575 INFO L82 PathProgramCache]: Analyzing trace with hash 764317007, now seen corresponding path program 1 times [2020-10-29 09:10:37,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:37,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434194207] [2020-10-29 09:10:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:37,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:38,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:38,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:10:38,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1337 [2020-10-29 09:10:38,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:38,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:38,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:38,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:38,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:10:38,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:39,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:39,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:39,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:39,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:39,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:39,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:39,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:39,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:39,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:39,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:39,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:39,128 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 09:10:39,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434194207] [2020-10-29 09:10:39,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:39,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:10:39,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126855364] [2020-10-29 09:10:39,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:39,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:39,132 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 8 states. [2020-10-29 09:10:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:40,037 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2020-10-29 09:10:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:40,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-29 09:10:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:40,045 INFO L225 Difference]: With dead ends: 179 [2020-10-29 09:10:40,045 INFO L226 Difference]: Without dead ends: 175 [2020-10-29 09:10:40,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-29 09:10:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 97. [2020-10-29 09:10:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:10:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2020-10-29 09:10:40,057 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 30 [2020-10-29 09:10:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:40,057 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2020-10-29 09:10:40,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2020-10-29 09:10:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:10:40,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:40,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:40,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:10:40,059 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash 584797111, now seen corresponding path program 1 times [2020-10-29 09:10:40,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:40,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237443636] [2020-10-29 09:10:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:40,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:10:40,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:10:40,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-29 09:10:40,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:40,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:40,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:40,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:10:40,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:40,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:40,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:40,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:40,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:40,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:40,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:40,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:40,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:40,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:40,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:40,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:40,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:10:40,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237443636] [2020-10-29 09:10:40,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:40,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:40,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266466015] [2020-10-29 09:10:40,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:40,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:40,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:40,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:40,545 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 5 states. [2020-10-29 09:10:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:40,849 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2020-10-29 09:10:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:40,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-29 09:10:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:40,851 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:10:40,851 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:10:40,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:10:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-10-29 09:10:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:10:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2020-10-29 09:10:40,882 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 32 [2020-10-29 09:10:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:40,882 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2020-10-29 09:10:40,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2020-10-29 09:10:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:10:40,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:40,885 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:40,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:10:40,885 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:40,885 INFO L82 PathProgramCache]: Analyzing trace with hash -539225007, now seen corresponding path program 1 times [2020-10-29 09:10:40,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:40,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124090151] [2020-10-29 09:10:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:10:41,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:41,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-29 09:10:41,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:41,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:41,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:10:41,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:41,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:41,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:41,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:41,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:41,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124090151] [2020-10-29 09:10:41,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:41,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:10:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726050714] [2020-10-29 09:10:41,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:41,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:41,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:41,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:41,215 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand 6 states. [2020-10-29 09:10:41,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:41,833 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2020-10-29 09:10:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:41,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-29 09:10:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:41,835 INFO L225 Difference]: With dead ends: 199 [2020-10-29 09:10:41,835 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:10:41,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:41,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:10:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2020-10-29 09:10:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-29 09:10:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2020-10-29 09:10:41,851 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 32 [2020-10-29 09:10:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:41,852 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2020-10-29 09:10:41,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2020-10-29 09:10:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:10:41,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:41,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:41,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:10:41,853 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1722800143, now seen corresponding path program 1 times [2020-10-29 09:10:41,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:41,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692484691] [2020-10-29 09:10:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:42,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:10:42,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:10:42,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-29 09:10:42,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:42,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:10:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:10:42,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:42,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:42,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:42,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:42,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:42,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:42,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:42,950 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 09:10:42,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692484691] [2020-10-29 09:10:42,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:42,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:10:42,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367376522] [2020-10-29 09:10:42,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:42,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:42,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:42,953 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand 8 states. [2020-10-29 09:10:43,440 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-29 09:10:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:43,929 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-10-29 09:10:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:43,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 09:10:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:43,931 INFO L225 Difference]: With dead ends: 147 [2020-10-29 09:10:43,931 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:10:43,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:10:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 122. [2020-10-29 09:10:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:10:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2020-10-29 09:10:43,946 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 33 [2020-10-29 09:10:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:43,946 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2020-10-29 09:10:43,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:43,946 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2020-10-29 09:10:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:43,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:43,947 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:43,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:10:43,947 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:43,948 INFO L82 PathProgramCache]: Analyzing trace with hash -692121367, now seen corresponding path program 1 times [2020-10-29 09:10:43,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:43,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851923728] [2020-10-29 09:10:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:43,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:44,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:44,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:10:44,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:44,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-29 09:10:44,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:44,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:44,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:44,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:44,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:10:44,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:44,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:44,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:44,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:44,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:44,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:44,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:44,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:44,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:44,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:44,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:44,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:44,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:10:44,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851923728] [2020-10-29 09:10:44,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:44,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:10:44,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396563811] [2020-10-29 09:10:44,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:44,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:44,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:44,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:44,751 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand 5 states. [2020-10-29 09:10:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:45,047 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2020-10-29 09:10:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:45,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-29 09:10:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:45,049 INFO L225 Difference]: With dead ends: 160 [2020-10-29 09:10:45,049 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:10:45,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:10:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-10-29 09:10:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-29 09:10:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2020-10-29 09:10:45,064 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 35 [2020-10-29 09:10:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:45,064 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2020-10-29 09:10:45,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2020-10-29 09:10:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:10:45,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:45,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:45,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:10:45,066 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1026630451, now seen corresponding path program 1 times [2020-10-29 09:10:45,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:45,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755718940] [2020-10-29 09:10:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:45,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:10:45,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-29 09:10:45,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:45,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 09:10:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:10:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:45,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:45,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:45,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:45,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:45,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:45,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:45,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:45,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:45,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:45,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:45,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755718940] [2020-10-29 09:10:45,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:45,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088966046] [2020-10-29 09:10:45,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:45,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:45,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:45,239 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand 4 states. [2020-10-29 09:10:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:45,483 INFO L93 Difference]: Finished difference Result 251 states and 320 transitions. [2020-10-29 09:10:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:45,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-29 09:10:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:45,485 INFO L225 Difference]: With dead ends: 251 [2020-10-29 09:10:45,485 INFO L226 Difference]: Without dead ends: 186 [2020-10-29 09:10:45,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-29 09:10:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 152. [2020-10-29 09:10:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-29 09:10:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2020-10-29 09:10:45,501 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 38 [2020-10-29 09:10:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:45,502 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2020-10-29 09:10:45,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2020-10-29 09:10:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:10:45,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:45,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:45,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:10:45,503 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:45,503 INFO L82 PathProgramCache]: Analyzing trace with hash 5562097, now seen corresponding path program 1 times [2020-10-29 09:10:45,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:45,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103822317] [2020-10-29 09:10:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:45,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:10:45,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:45,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 09:10:45,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:45,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:45,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:45,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 09:10:45,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:10:45,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:45,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:45,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:45,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:45,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:45,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:45,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:45,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:45,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103822317] [2020-10-29 09:10:45,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:45,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:45,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894864824] [2020-10-29 09:10:45,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:45,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:45,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:45,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:45,608 INFO L87 Difference]: Start difference. First operand 152 states and 187 transitions. Second operand 4 states. [2020-10-29 09:10:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:45,807 INFO L93 Difference]: Finished difference Result 262 states and 332 transitions. [2020-10-29 09:10:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:45,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-29 09:10:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:45,808 INFO L225 Difference]: With dead ends: 262 [2020-10-29 09:10:45,809 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 09:10:45,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 09:10:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 146. [2020-10-29 09:10:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-29 09:10:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2020-10-29 09:10:45,837 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 38 [2020-10-29 09:10:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:45,837 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2020-10-29 09:10:45,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2020-10-29 09:10:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:10:45,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:45,838 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:45,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:10:45,838 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1815445846, now seen corresponding path program 1 times [2020-10-29 09:10:45,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:45,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656186253] [2020-10-29 09:10:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:47,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:10:47,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:47,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1949 [2020-10-29 09:10:47,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:47,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:10:47,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:48,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:48,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:48,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:48,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:48,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:48,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:48,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:48,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:48,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:48,221 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 09:10:48,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656186253] [2020-10-29 09:10:48,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:48,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:48,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881751717] [2020-10-29 09:10:48,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:48,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:48,225 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand 10 states. [2020-10-29 09:10:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:49,200 INFO L93 Difference]: Finished difference Result 292 states and 368 transitions. [2020-10-29 09:10:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:49,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-29 09:10:49,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:49,202 INFO L225 Difference]: With dead ends: 292 [2020-10-29 09:10:49,202 INFO L226 Difference]: Without dead ends: 239 [2020-10-29 09:10:49,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:10:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-29 09:10:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2020-10-29 09:10:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-29 09:10:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2020-10-29 09:10:49,220 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 39 [2020-10-29 09:10:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:49,221 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2020-10-29 09:10:49,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2020-10-29 09:10:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:10:49,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:49,222 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:49,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:10:49,222 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -25603109, now seen corresponding path program 1 times [2020-10-29 09:10:49,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:49,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866103434] [2020-10-29 09:10:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:49,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:49,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:49,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:10:49,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:49,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-29 09:10:49,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:49,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-29 09:10:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:10:49,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:49,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:49,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:49,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:49,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:49,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:49,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:49,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:49,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:10:49,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866103434] [2020-10-29 09:10:49,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:49,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676458509] [2020-10-29 09:10:49,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:49,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:49,341 INFO L87 Difference]: Start difference. First operand 165 states and 202 transitions. Second operand 4 states. [2020-10-29 09:10:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:49,518 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2020-10-29 09:10:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:49,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-29 09:10:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:49,520 INFO L225 Difference]: With dead ends: 168 [2020-10-29 09:10:49,520 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:10:49,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:10:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-10-29 09:10:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 09:10:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2020-10-29 09:10:49,536 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 39 [2020-10-29 09:10:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:49,536 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2020-10-29 09:10:49,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2020-10-29 09:10:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:10:49,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:49,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:49,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:10:49,537 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:49,538 INFO L82 PathProgramCache]: Analyzing trace with hash 863211217, now seen corresponding path program 1 times [2020-10-29 09:10:49,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:49,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793451545] [2020-10-29 09:10:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:10:49,556 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:10:49,556 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:10:49,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:10:49,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:10:49 BoogieIcfgContainer [2020-10-29 09:10:49,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:10:49,584 INFO L168 Benchmark]: Toolchain (without parser) took 21850.61 ms. Allocated memory was 165.7 MB in the beginning and 433.1 MB in the end (delta: 267.4 MB). Free memory was 140.0 MB in the beginning and 270.1 MB in the end (delta: -130.1 MB). Peak memory consumption was 137.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:49,585 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 165.7 MB. Free memory was 137.7 MB in the beginning and 137.5 MB in the end (delta: 139.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:49,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 604.31 ms. Allocated memory is still 165.7 MB. Free memory was 139.4 MB in the beginning and 116.8 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:49,586 INFO L168 Benchmark]: Boogie Preprocessor took 84.00 ms. Allocated memory is still 165.7 MB. Free memory was 116.8 MB in the beginning and 113.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:49,587 INFO L168 Benchmark]: RCFGBuilder took 950.34 ms. Allocated memory is still 165.7 MB. Free memory was 113.5 MB in the beginning and 95.6 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:49,587 INFO L168 Benchmark]: TraceAbstraction took 20194.15 ms. Allocated memory was 165.7 MB in the beginning and 433.1 MB in the end (delta: 267.4 MB). Free memory was 95.1 MB in the beginning and 270.1 MB in the end (delta: -175.0 MB). Peak memory consumption was 92.3 MB. Max. memory is 8.0 GB. [2020-10-29 09:10:49,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 165.7 MB. Free memory was 137.7 MB in the beginning and 137.5 MB in the end (delta: 139.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 604.31 ms. Allocated memory is still 165.7 MB. Free memory was 139.4 MB in the beginning and 116.8 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 84.00 ms. Allocated memory is still 165.7 MB. Free memory was 116.8 MB in the beginning and 113.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 950.34 ms. Allocated memory is still 165.7 MB. Free memory was 113.5 MB in the beginning and 95.6 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20194.15 ms. Allocated memory was 165.7 MB in the beginning and 433.1 MB in the end (delta: 267.4 MB). Free memory was 95.1 MB in the beginning and 270.1 MB in the end (delta: -175.0 MB). Peak memory consumption was 92.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1002] SLL* list = malloc(sizeof(SLL)); [L1003] list->next = ((void*)0) [L1004] COND FALSE !(!(list != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1004] list->inner = malloc(sizeof(SLL)) [L1004] EXPR list->inner [L1004] list->inner->next = ((void*)0) [L1004] EXPR list->inner [L1004] list->inner->inner = ((void*)0) [L1004] EXPR list->inner [L1004] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1004] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1006] SLL* end = list; [L1009] COND FALSE !(__VERIFIER_nondet_int()) [L1019] end = ((void*)0) [L1020] end = list [L1023] COND FALSE !(!(((void*)0) != end)) [L1025] COND TRUE ((void*)0) != end [L1027] int len = 0; [L1028] EXPR end->inner [L1028] SLL* inner = end->inner; [L1029] COND TRUE ((void*)0) != inner [L1031] COND TRUE len == 0 [L1032] len = 1 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND FALSE !(!(((void*)0) == inner->inner)) [L1037] EXPR inner->next [L1037] COND FALSE !(!(((void*)0) == inner->next)) [L1038] EXPR inner->inner [L1038] inner = inner->inner [L1039] COND TRUE len == 1 [L1040] EXPR inner->inner [L1040] inner = inner->inner [L1029] COND TRUE ((void*)0) != inner [L1031] COND FALSE !(len == 0) [L1034] len = 2 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND TRUE !(((void*)0) == inner->inner) [L1036] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "sll-01-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 94 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.0s, OverallIterations: 21, TraceHistogramMax: 2, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1717 SDtfs, 1601 SDslu, 2997 SDs, 0 SdLazy, 3657 SolverSat, 386 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 634 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 597 NumberOfCodeBlocks, 597 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 535 ConstructedInterpolants, 0 QuantifiedInterpolants, 154887 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 9/13 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...