/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-queue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:11:05,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:11:05,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:11:05,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:11:05,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:11:05,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:11:05,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:11:05,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:11:05,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:11:05,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:11:05,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:11:05,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:11:05,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:11:05,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:11:05,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:11:05,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:11:05,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:11:05,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:11:05,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:11:05,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:11:05,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:11:05,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:11:05,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:11:05,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:11:05,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:11:05,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:11:05,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:11:05,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:11:05,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:11:05,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:11:05,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:11:05,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:11:05,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:11:05,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:11:05,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:11:05,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:11:05,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:11:05,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:11:05,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:11:05,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:11:05,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:11:05,700 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 09:11:05,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:11:05,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:11:05,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:11:05,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:11:05,761 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:11:05,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:11:05,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:11:05,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:11:05,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:11:05,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:11:05,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:11:05,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:11:05,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:11:05,764 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:11:05,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:11:05,765 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:11:05,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:11:05,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:11:05,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:11:05,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:11:05,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:11:05,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:11:05,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:11:05,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:11:05,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:11:05,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:11:05,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:11:05,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:11:05,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:11:05,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:11:06,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:11:06,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:11:06,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:11:06,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:11:06,259 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:11:06,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-queue-2.i [2020-10-29 09:11:06,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d097707d/3dbde4a1facd43adb3e5b4c9215099fa/FLAG213f493f8 [2020-10-29 09:11:07,163 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:11:07,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-queue-2.i [2020-10-29 09:11:07,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d097707d/3dbde4a1facd43adb3e5b4c9215099fa/FLAG213f493f8 [2020-10-29 09:11:07,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d097707d/3dbde4a1facd43adb3e5b4c9215099fa [2020-10-29 09:11:07,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:11:07,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:11:07,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:11:07,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:11:07,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:11:07,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:07,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f4fa17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07, skipping insertion in model container [2020-10-29 09:11:07,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:07,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:11:07,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:11:07,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:11:07,857 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:11:07,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:11:07,973 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:11:07,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07 WrapperNode [2020-10-29 09:11:07,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:11:07,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:11:07,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:11:07,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:11:07,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:07,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:08,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:08,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:08,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:08,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:08,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (1/1) ... [2020-10-29 09:11:08,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:11:08,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:11:08,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:11:08,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:11:08,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (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 09:11:08,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:11:08,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:11:08,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:11:08,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:11:08,155 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:11:08,155 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:11:08,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:11:08,155 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:11:08,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:11:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:11:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:11:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:11:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:11:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:11:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:11:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:11:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:11:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:11:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:11:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:11:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:11:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:11:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:11:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:11:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:11:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:11:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:11:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:11:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:11:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:11:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:11:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:11:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:11:08,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:11:08,160 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:11:08,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:11:08,160 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:11:08,160 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:11:08,160 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:11:08,161 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:11:08,161 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:11:08,161 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:11:08,161 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:11:08,161 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:11:08,161 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:11:08,161 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:11:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:11:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:11:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:11:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:11:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:11:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:11:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:11:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:11:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:11:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:11:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:11:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:11:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:11:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:11:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:11:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:11:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:11:08,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:11:08,165 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:11:08,165 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:11:08,165 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:11:08,165 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:11:08,165 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:11:08,166 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:11:08,166 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:11:08,166 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:11:08,168 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:11:08,168 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:11:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:11:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:11:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:11:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:11:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:11:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:11:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:11:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:11:08,171 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:11:08,171 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:11:08,171 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:11:08,171 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:11:08,171 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:11:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:11:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:11:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:11:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:11:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:11:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:11:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:11:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:11:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:11:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:11:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:11:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:11:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:11:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:11:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:11:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:11:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:11:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:11:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:11:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:11:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:11:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:11:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:11:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:11:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:11:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:11:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:11:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:11:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:11:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:11:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:11:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:11:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:11:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:11:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:11:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:11:08,887 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:11:08,887 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-10-29 09:11:08,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:11:08 BoogieIcfgContainer [2020-10-29 09:11:08,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:11:08,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:11:08,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:11:08,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:11:08,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:11:07" (1/3) ... [2020-10-29 09:11:08,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19693388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:11:08, skipping insertion in model container [2020-10-29 09:11:08,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:07" (2/3) ... [2020-10-29 09:11:08,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19693388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:11:08, skipping insertion in model container [2020-10-29 09:11:08,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:11:08" (3/3) ... [2020-10-29 09:11:08,901 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-queue-2.i [2020-10-29 09:11:08,917 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:11:08,925 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:11:08,943 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:11:08,977 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:11:08,978 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:11:08,978 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:11:08,978 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:11:08,978 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:11:08,978 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:11:08,979 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:11:08,979 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:11:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-10-29 09:11:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-29 09:11:09,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:09,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:09,023 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:09,039 INFO L82 PathProgramCache]: Analyzing trace with hash 218866609, now seen corresponding path program 1 times [2020-10-29 09:11:09,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:09,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856518059] [2020-10-29 09:11:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:09,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:11:09,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:09,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-29 09:11:09,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:09,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:11:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:09,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:11:09,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:11:09,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:09,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:09,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:09,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 09:11:09,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:09,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:09,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 21 [2020-10-29 09:11:09,734 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 09:11:09,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856518059] [2020-10-29 09:11:09,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:09,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:11:09,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176900619] [2020-10-29 09:11:09,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:11:09,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:09,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:11:09,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:11:09,788 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2020-10-29 09:11:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:10,072 INFO L93 Difference]: Finished difference Result 164 states and 300 transitions. [2020-10-29 09:11:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:11:10,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-29 09:11:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:10,085 INFO L225 Difference]: With dead ends: 164 [2020-10-29 09:11:10,085 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:11:10,090 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 09:11:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:11:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-29 09:11:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:11:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-29 09:11:10,141 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 11 [2020-10-29 09:11:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:10,141 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-29 09:11:10,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:11:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-29 09:11:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:11:10,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:10,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:10,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:11:10,144 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:10,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1246734287, now seen corresponding path program 1 times [2020-10-29 09:11:10,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:10,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111406503] [2020-10-29 09:11:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:11:10,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-29 09:11:10,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:11:10,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:11:10,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:11:10,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:10,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:10,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:11:10,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:10,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:10,339 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 09:11:10,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111406503] [2020-10-29 09:11:10,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:10,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:11:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780503009] [2020-10-29 09:11:10,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:11:10,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:10,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:11:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:11:10,344 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 4 states. [2020-10-29 09:11:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:10,521 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-29 09:11:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:11:10,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-29 09:11:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:10,524 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:11:10,524 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:11:10,525 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 09:11:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:11:10,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 09:11:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:11:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-29 09:11:10,538 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 15 [2020-10-29 09:11:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:10,538 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-29 09:11:10,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:11:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-29 09:11:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:11:10,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:10,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:10,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:11:10,540 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1069993799, now seen corresponding path program 1 times [2020-10-29 09:11:10,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:10,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555460933] [2020-10-29 09:11:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:11:10,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-29 09:11:10,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:11:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:11:10,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:11:10,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:10,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:11:10,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:10,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:10,759 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 09:11:10,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555460933] [2020-10-29 09:11:10,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:10,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:11:10,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889696672] [2020-10-29 09:11:10,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:11:10,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:11:10,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:11:10,764 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 4 states. [2020-10-29 09:11:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:11,003 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-29 09:11:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:11:11,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-29 09:11:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:11,007 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:11:11,007 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:11:11,010 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 09:11:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:11:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-29 09:11:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:11:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-29 09:11:11,035 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2020-10-29 09:11:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:11,036 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-29 09:11:11,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:11:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-29 09:11:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:11:11,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:11,039 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] [2020-10-29 09:11:11,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:11:11,042 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:11,042 INFO L82 PathProgramCache]: Analyzing trace with hash 937711355, now seen corresponding path program 1 times [2020-10-29 09:11:11,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:11,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351351664] [2020-10-29 09:11:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:11,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:11,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:11:11,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:11,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-29 09:11:11,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:11,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:11:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:11:11,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:11,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:11,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:11,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:11,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:11,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:11,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:11,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:11,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:11,643 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 09:11:11,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351351664] [2020-10-29 09:11:11,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:11,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:11:11,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636668300] [2020-10-29 09:11:11,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:11:11,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:11:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:11:11,646 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 5 states. [2020-10-29 09:11:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:11,825 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2020-10-29 09:11:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:11:11,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-29 09:11:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:11,827 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:11:11,827 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:11:11,828 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 09:11:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:11:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 09:11:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:11:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-29 09:11:11,837 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 23 [2020-10-29 09:11:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:11,837 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-29 09:11:11,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:11:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-29 09:11:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:11:11,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:11,839 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] [2020-10-29 09:11:11,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:11:11,839 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:11,840 INFO L82 PathProgramCache]: Analyzing trace with hash 309576248, now seen corresponding path program 1 times [2020-10-29 09:11:11,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:11,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392801409] [2020-10-29 09:11:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:11,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:11,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:11:11,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:11,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-29 09:11:11,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:11,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:11:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:11:11,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:12,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:12,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:12,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:12,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:12,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:12,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:12,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:12,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:12,115 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 09:11:12,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392801409] [2020-10-29 09:11:12,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:12,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:11:12,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166734419] [2020-10-29 09:11:12,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:11:12,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:12,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:11:12,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:11:12,118 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 7 states. [2020-10-29 09:11:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:12,491 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2020-10-29 09:11:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:12,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-29 09:11:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:12,493 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:11:12,493 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 09:11:12,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 09:11:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 84. [2020-10-29 09:11:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:11:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-29 09:11:12,504 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2020-10-29 09:11:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:12,505 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-29 09:11:12,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:11:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-29 09:11:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:11:12,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:12,507 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:12,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:11:12,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1376318958, now seen corresponding path program 1 times [2020-10-29 09:11:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:12,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347809048] [2020-10-29 09:11:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:12,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:12,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:11:12,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:12,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-29 09:11:12,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:12,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:11:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:11:12,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:12,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:12,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:12,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:12,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:12,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:12,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:12,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:12,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:12,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:12,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:12,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:12,854 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 09:11:12,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347809048] [2020-10-29 09:11:12,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:12,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:11:12,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774457933] [2020-10-29 09:11:12,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:11:12,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:12,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:11:12,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:11:12,857 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-10-29 09:11:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:13,160 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2020-10-29 09:11:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:13,160 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-29 09:11:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:13,161 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:11:13,162 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:11:13,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:11:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 90. [2020-10-29 09:11:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 09:11:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2020-10-29 09:11:13,173 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 26 [2020-10-29 09:11:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:13,173 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2020-10-29 09:11:13,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:11:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2020-10-29 09:11:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:11:13,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:13,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:13,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:11:13,175 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:13,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1749170472, now seen corresponding path program 1 times [2020-10-29 09:11:13,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:13,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373757043] [2020-10-29 09:11:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:13,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:11:13,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:13,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-29 09:11:13,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:11:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:11:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:13,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:13,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:13,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:13,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:13,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:13,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:13,525 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 09:11:13,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373757043] [2020-10-29 09:11:13,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:13,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:11:13,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316559299] [2020-10-29 09:11:13,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:11:13,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:11:13,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:11:13,529 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand 7 states. [2020-10-29 09:11:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:13,865 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2020-10-29 09:11:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:13,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-29 09:11:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:13,868 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:11:13,868 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:11:13,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:11:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2020-10-29 09:11:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:11:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2020-10-29 09:11:13,896 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 27 [2020-10-29 09:11:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:13,897 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2020-10-29 09:11:13,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:11:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2020-10-29 09:11:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:11:13,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:13,900 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] [2020-10-29 09:11:13,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:11:13,900 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:13,903 INFO L82 PathProgramCache]: Analyzing trace with hash 262399079, now seen corresponding path program 1 times [2020-10-29 09:11:13,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:13,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417858332] [2020-10-29 09:11:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:14,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:11:14,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:14,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-29 09:11:14,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:14,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:11:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:11:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:11:14,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:14,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:14,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:14,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:14,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:14,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:14,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:14,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:14,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:14,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417858332] [2020-10-29 09:11:14,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:14,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:11:14,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697108965] [2020-10-29 09:11:14,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:11:14,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:14,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:11:14,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:11:14,158 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand 4 states. [2020-10-29 09:11:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:14,369 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2020-10-29 09:11:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:11:14,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:11:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:14,371 INFO L225 Difference]: With dead ends: 187 [2020-10-29 09:11:14,371 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 09:11:14,374 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 09:11:14,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 09:11:14,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-10-29 09:11:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:11:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-10-29 09:11:14,392 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 29 [2020-10-29 09:11:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:14,392 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-10-29 09:11:14,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:11:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-10-29 09:11:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:14,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:14,397 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:14,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:11:14,397 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -84648472, now seen corresponding path program 1 times [2020-10-29 09:11:14,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:14,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719832549] [2020-10-29 09:11:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:14,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:14,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:14,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:14,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-29 09:11:14,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:14,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:11:14,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:14,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:14,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:14,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:14,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:14,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:14,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:14,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:14,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719832549] [2020-10-29 09:11:14,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:14,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:14,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057043943] [2020-10-29 09:11:14,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:14,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:14,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:14,989 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 8 states. [2020-10-29 09:11:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:15,283 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-10-29 09:11:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:15,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 09:11:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:15,285 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:11:15,285 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 09:11:15,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 09:11:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2020-10-29 09:11:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:11:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-10-29 09:11:15,295 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 33 [2020-10-29 09:11:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:15,295 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-10-29 09:11:15,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-10-29 09:11:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:11:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:15,301 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:15,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:11:15,301 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:15,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:15,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2040254526, now seen corresponding path program 1 times [2020-10-29 09:11:15,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:15,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23962670] [2020-10-29 09:11:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:15,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:15,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:11:15,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:15,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-29 09:11:15,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:15,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:15,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:15,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:15,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:15,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:15,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:15,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:15,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:15,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:15,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:15,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:15,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:15,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:15,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23962670] [2020-10-29 09:11:15,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:15,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:15,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39211121] [2020-10-29 09:11:15,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:15,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:15,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:15,773 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 8 states. [2020-10-29 09:11:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:16,122 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-10-29 09:11:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:16,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-29 09:11:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:16,124 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:11:16,124 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:11:16,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:11:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-29 09:11:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:11:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-29 09:11:16,132 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 34 [2020-10-29 09:11:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:16,132 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-29 09:11:16,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-29 09:11:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:16,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:16,134 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 09:11:16,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:11:16,134 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1668646551, now seen corresponding path program 1 times [2020-10-29 09:11:16,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:16,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887775466] [2020-10-29 09:11:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:16,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:16,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-29 09:11:16,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:16,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:11:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:11:16,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:16,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:16,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:16,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:16,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:16,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:16,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:16,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:16,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:16,468 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 09:11:16,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887775466] [2020-10-29 09:11:16,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:16,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:16,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995068897] [2020-10-29 09:11:16,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:16,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:16,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:16,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:16,471 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 8 states. [2020-10-29 09:11:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:16,911 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2020-10-29 09:11:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:16,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-29 09:11:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:16,913 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:11:16,914 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 09:11:16,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 09:11:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2020-10-29 09:11:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:11:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2020-10-29 09:11:16,932 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 35 [2020-10-29 09:11:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:16,932 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2020-10-29 09:11:16,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2020-10-29 09:11:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:16,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:16,935 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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] [2020-10-29 09:11:16,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:11:16,935 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1652962952, now seen corresponding path program 1 times [2020-10-29 09:11:16,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:16,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587053912] [2020-10-29 09:11:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:16,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:17,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:17,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:17,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-29 09:11:17,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:17,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:11:17,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:17,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:17,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:17,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:17,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:17,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:11:17,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:17,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:17,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:17,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:17,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587053912] [2020-10-29 09:11:17,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:17,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:17,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093879565] [2020-10-29 09:11:17,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:17,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:17,429 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 8 states. [2020-10-29 09:11:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:17,712 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-10-29 09:11:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:17,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-29 09:11:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:17,714 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:11:17,714 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:11:17,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:11:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-29 09:11:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:11:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2020-10-29 09:11:17,723 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 35 [2020-10-29 09:11:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:17,724 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2020-10-29 09:11:17,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2020-10-29 09:11:17,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:11:17,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:17,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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] [2020-10-29 09:11:17,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:11:17,725 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1242507287, now seen corresponding path program 1 times [2020-10-29 09:11:17,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:17,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362277583] [2020-10-29 09:11:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:17,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:17,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:11:17,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:17,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-29 09:11:17,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:17,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:17,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:17,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:17,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:11:17,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:18,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:18,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:18,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:18,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:18,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:18,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:18,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:18,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:18,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:18,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:18,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:18,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:18,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362277583] [2020-10-29 09:11:18,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:18,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130486848] [2020-10-29 09:11:18,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:18,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:18,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:18,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:18,161 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand 8 states. [2020-10-29 09:11:18,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:18,629 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2020-10-29 09:11:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:11:18,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-29 09:11:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:18,631 INFO L225 Difference]: With dead ends: 166 [2020-10-29 09:11:18,631 INFO L226 Difference]: Without dead ends: 162 [2020-10-29 09:11:18,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-29 09:11:18,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 122. [2020-10-29 09:11:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:11:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2020-10-29 09:11:18,641 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 37 [2020-10-29 09:11:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:18,642 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2020-10-29 09:11:18,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2020-10-29 09:11:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:18,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:18,643 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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] [2020-10-29 09:11:18,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:11:18,643 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1804779986, now seen corresponding path program 1 times [2020-10-29 09:11:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:18,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964558321] [2020-10-29 09:11:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:18,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:18,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:19,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:19,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:19,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:19,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-29 09:11:19,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:19,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:19,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:11:19,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:19,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:11:19,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:19,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:19,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:19,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:19,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:19,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:19,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:19,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:19,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:19,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:19,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964558321] [2020-10-29 09:11:19,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:19,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640189479] [2020-10-29 09:11:19,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:19,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:19,327 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand 10 states. [2020-10-29 09:11:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:19,989 INFO L93 Difference]: Finished difference Result 183 states and 212 transitions. [2020-10-29 09:11:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:19,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-29 09:11:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:19,992 INFO L225 Difference]: With dead ends: 183 [2020-10-29 09:11:19,993 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:11:19,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:11:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-10-29 09:11:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:11:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2020-10-29 09:11:20,005 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 38 [2020-10-29 09:11:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:20,005 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2020-10-29 09:11:20,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2020-10-29 09:11:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:20,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:20,006 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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] [2020-10-29 09:11:20,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:11:20,007 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:20,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1324561949, now seen corresponding path program 1 times [2020-10-29 09:11:20,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:20,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719191500] [2020-10-29 09:11:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:20,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:20,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:20,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:20,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-29 09:11:20,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:20,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:20,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:11:20,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:20,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:20,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:20,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:20,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:20,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:20,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:20,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:20,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:20,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:20,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719191500] [2020-10-29 09:11:20,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:20,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:20,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414605543] [2020-10-29 09:11:20,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:20,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:20,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:20,470 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 8 states. [2020-10-29 09:11:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:20,883 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2020-10-29 09:11:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:11:20,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-29 09:11:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:20,885 INFO L225 Difference]: With dead ends: 170 [2020-10-29 09:11:20,885 INFO L226 Difference]: Without dead ends: 166 [2020-10-29 09:11:20,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-29 09:11:20,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2020-10-29 09:11:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:11:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-10-29 09:11:20,896 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 38 [2020-10-29 09:11:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:20,897 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-10-29 09:11:20,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-10-29 09:11:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:11:20,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:20,898 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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] [2020-10-29 09:11:20,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:11:20,898 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1953957478, now seen corresponding path program 1 times [2020-10-29 09:11:20,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:20,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076064893] [2020-10-29 09:11:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:21,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:11:21,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:21,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-29 09:11:21,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:21,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:11:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:11:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:11:21,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:21,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:21,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:21,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:21,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:21,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:21,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:11:21,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076064893] [2020-10-29 09:11:21,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:21,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:11:21,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414368006] [2020-10-29 09:11:21,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:11:21,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:11:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:11:21,075 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand 4 states. [2020-10-29 09:11:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:21,317 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2020-10-29 09:11:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:11:21,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-29 09:11:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:21,319 INFO L225 Difference]: With dead ends: 255 [2020-10-29 09:11:21,320 INFO L226 Difference]: Without dead ends: 155 [2020-10-29 09:11:21,321 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 09:11:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-29 09:11:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2020-10-29 09:11:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:11:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2020-10-29 09:11:21,337 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 41 [2020-10-29 09:11:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:21,338 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2020-10-29 09:11:21,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:11:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2020-10-29 09:11:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:11:21,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:21,340 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-29 09:11:21,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:11:21,340 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash 989426657, now seen corresponding path program 1 times [2020-10-29 09:11:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:21,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425487042] [2020-10-29 09:11:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:21,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:22,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:11:22,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:11:22,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-29 09:11:22,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:22,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:11:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:11:22,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:11:22,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:22,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:22,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:22,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:22,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:22,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:22,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:22,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:22,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:22,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:22,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:22,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425487042] [2020-10-29 09:11:22,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:22,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:11:22,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323002220] [2020-10-29 09:11:22,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:11:22,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:22,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:11:22,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:11:22,421 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand 5 states. [2020-10-29 09:11:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:22,616 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2020-10-29 09:11:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:11:22,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-29 09:11:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:22,618 INFO L225 Difference]: With dead ends: 210 [2020-10-29 09:11:22,619 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:11:22,619 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 09:11:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:11:22,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-29 09:11:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 09:11:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2020-10-29 09:11:22,630 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 43 [2020-10-29 09:11:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:22,631 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2020-10-29 09:11:22,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:11:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2020-10-29 09:11:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:11:22,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:22,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-10-29 09:11:22,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:11:22,632 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash 402620643, now seen corresponding path program 1 times [2020-10-29 09:11:22,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:22,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373307969] [2020-10-29 09:11:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:22,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:11:22,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:22,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-29 09:11:22,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:22,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:11:22,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:22,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:22,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:22,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:22,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:22,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:22,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:22,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:22,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:22,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:22,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:22,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:22,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373307969] [2020-10-29 09:11:22,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:22,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:22,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38125420] [2020-10-29 09:11:22,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:22,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:22,991 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand 9 states. [2020-10-29 09:11:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:23,398 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2020-10-29 09:11:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:11:23,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-29 09:11:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:23,400 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:11:23,400 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:11:23,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:11:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-29 09:11:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-29 09:11:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2020-10-29 09:11:23,415 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 43 [2020-10-29 09:11:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:23,416 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2020-10-29 09:11:23,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2020-10-29 09:11:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:11:23,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:23,417 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:23,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:11:23,417 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:23,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1070744259, now seen corresponding path program 1 times [2020-10-29 09:11:23,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:23,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633330091] [2020-10-29 09:11:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:23,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:23,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:11:23,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:23,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-29 09:11:23,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:23,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:23,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:23,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:23,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:11:23,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:24,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:24,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:24,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:24,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:24,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:24,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:24,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:24,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:24,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633330091] [2020-10-29 09:11:24,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:24,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:24,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025381540] [2020-10-29 09:11:24,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:24,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:24,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:24,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:24,083 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand 9 states. [2020-10-29 09:11:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:24,403 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-10-29 09:11:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:11:24,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-29 09:11:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:24,405 INFO L225 Difference]: With dead ends: 119 [2020-10-29 09:11:24,405 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:11:24,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:11:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-29 09:11:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-29 09:11:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-10-29 09:11:24,415 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 46 [2020-10-29 09:11:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:24,415 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-10-29 09:11:24,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-10-29 09:11:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:11:24,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:24,416 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:24,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:11:24,417 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:24,417 INFO L82 PathProgramCache]: Analyzing trace with hash -501133880, now seen corresponding path program 1 times [2020-10-29 09:11:24,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:24,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440141810] [2020-10-29 09:11:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:24,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:24,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:11:24,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:24,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-29 09:11:24,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:24,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:24,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:24,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:24,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:11:24,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:25,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:25,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:25,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:25,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:25,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:25,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:25,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:25,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:25,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:25,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:25,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:25,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440141810] [2020-10-29 09:11:25,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:25,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:25,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103559227] [2020-10-29 09:11:25,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:25,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:25,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:25,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:25,379 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 11 states. [2020-10-29 09:11:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:25,813 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-10-29 09:11:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:11:25,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-29 09:11:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:25,814 INFO L225 Difference]: With dead ends: 127 [2020-10-29 09:11:25,814 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:11:25,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:11:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2020-10-29 09:11:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:11:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-29 09:11:25,826 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 47 [2020-10-29 09:11:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:25,827 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-29 09:11:25,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-29 09:11:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:11:25,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:25,827 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:25,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:11:25,828 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1666759241, now seen corresponding path program 1 times [2020-10-29 09:11:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:25,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609522704] [2020-10-29 09:11:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:25,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:26,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:26,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:11:26,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:26,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-29 09:11:26,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:26,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:26,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:26,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:26,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:11:26,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:26,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:26,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:26,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:26,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:26,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:26,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:26,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:26,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:26,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:26,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:26,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:26,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609522704] [2020-10-29 09:11:26,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:26,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:26,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283114230] [2020-10-29 09:11:26,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:26,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:26,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:26,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:26,331 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 9 states. [2020-10-29 09:11:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:26,654 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-10-29 09:11:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:11:26,655 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-29 09:11:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:26,656 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:11:26,656 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 09:11:26,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 09:11:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-29 09:11:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:11:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2020-10-29 09:11:26,665 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 47 [2020-10-29 09:11:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:26,665 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2020-10-29 09:11:26,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2020-10-29 09:11:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:11:26,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:26,666 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:26,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:11:26,667 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash -127104064, now seen corresponding path program 1 times [2020-10-29 09:11:26,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:26,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977204919] [2020-10-29 09:11:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:27,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:27,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:11:27,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:27,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-29 09:11:27,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:27,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:11:27,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:27,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:27,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:27,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:27,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:27,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:27,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:27,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:27,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:27,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:27,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:27,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:27,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:27,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977204919] [2020-10-29 09:11:27,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:27,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:27,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056555410] [2020-10-29 09:11:27,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:27,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:27,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:27,289 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 9 states. [2020-10-29 09:11:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:27,796 INFO L93 Difference]: Finished difference Result 178 states and 194 transitions. [2020-10-29 09:11:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:11:27,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-29 09:11:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:27,798 INFO L225 Difference]: With dead ends: 178 [2020-10-29 09:11:27,798 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 09:11:27,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 09:11:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2020-10-29 09:11:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:11:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2020-10-29 09:11:27,810 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 50 [2020-10-29 09:11:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:27,810 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2020-10-29 09:11:27,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2020-10-29 09:11:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:11:27,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:27,811 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:27,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:11:27,811 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:27,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2035219383, now seen corresponding path program 1 times [2020-10-29 09:11:27,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:27,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692003670] [2020-10-29 09:11:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:11:27,836 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:11:27,836 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:11:27,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:11:27,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:11:27 BoogieIcfgContainer [2020-10-29 09:11:27,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:11:27,866 INFO L168 Benchmark]: Toolchain (without parser) took 20467.25 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 127.1 MB in the beginning and 283.3 MB in the end (delta: -156.2 MB). Peak memory consumption was 77.2 MB. Max. memory is 8.0 GB. [2020-10-29 09:11:27,867 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 125.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:11:27,867 INFO L168 Benchmark]: CACSL2BoogieTranslator took 567.08 ms. Allocated memory is still 153.1 MB. Free memory was 126.6 MB in the beginning and 104.0 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:11:27,868 INFO L168 Benchmark]: Boogie Preprocessor took 92.30 ms. Allocated memory is still 153.1 MB. Free memory was 104.0 MB in the beginning and 134.9 MB in the end (delta: -30.9 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:11:27,868 INFO L168 Benchmark]: RCFGBuilder took 821.35 ms. Allocated memory is still 153.1 MB. Free memory was 134.9 MB in the beginning and 81.4 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:11:27,869 INFO L168 Benchmark]: TraceAbstraction took 18971.27 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 80.9 MB in the beginning and 283.3 MB in the end (delta: -202.4 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. [2020-10-29 09:11:27,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 125.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 567.08 ms. Allocated memory is still 153.1 MB. Free memory was 126.6 MB in the beginning and 104.0 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 92.30 ms. Allocated memory is still 153.1 MB. Free memory was 104.0 MB in the beginning and 134.9 MB in the end (delta: -30.9 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 821.35 ms. Allocated memory is still 153.1 MB. Free memory was 134.9 MB in the beginning and 81.4 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18971.27 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 80.9 MB in the beginning and 283.3 MB in the end (delta: -202.4 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) [L998] head->data = 0 [L999] SLL* item = head; [L1000] int status = 0; [L1002] COND TRUE __VERIFIER_nondet_int() [L1004] item->next = malloc(sizeof(SLL)) [L1005] EXPR item->next [L1005] item = item->next [L1006] item->next = ((void*)0) [L1008] COND TRUE !status [L1010] item->data = 1 [L1011] status = 1 [L1024] COND FALSE !(!(head != ((void*)0))) [L1025] COND FALSE !(!(item != ((void*)0))) [L1002] COND TRUE __VERIFIER_nondet_int() [L1004] item->next = malloc(sizeof(SLL)) [L1005] EXPR item->next [L1005] item = item->next [L1006] item->next = ((void*)0) [L1008] COND FALSE !(!status) [L1013] COND TRUE status == 1 [L1015] item->data = 2 [L1016] status = 2 [L1024] COND FALSE !(!(head != ((void*)0))) [L1025] COND FALSE !(!(item != ((void*)0))) [L1002] COND TRUE __VERIFIER_nondet_int() [L1004] item->next = malloc(sizeof(SLL)) [L1005] EXPR item->next [L1005] item = item->next [L1006] item->next = ((void*)0) [L1008] COND FALSE !(!status) [L1013] COND FALSE !(status == 1) [L1018] COND TRUE status >= 2 [L1020] item->data = 3 [L1021] status = 3 [L1024] COND FALSE !(!(head != ((void*)0))) [L1025] COND FALSE !(!(item != ((void*)0))) [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1028] COND FALSE !(!(head != ((void*)0))) [L1029] COND FALSE !(status == 1) [L1034] COND FALSE !(status == 2) [L1040] COND TRUE status == 3 [L1042] COND FALSE !(!(head != ((void*)0))) [L1043] EXPR head->next [L1043] COND FALSE !(!(head->next != ((void*)0))) [L1044] EXPR head->next [L1044] EXPR head->next->next [L1044] COND FALSE !(!(head->next->next != ((void*)0))) [L1045] EXPR head->next [L1045] EXPR head->next->next [L1045] EXPR head->next->next->next [L1045] COND FALSE !(!(head->next->next->next != ((void*)0))) [L1046] EXPR head->next [L1046] EXPR head->next->next [L1046] EXPR head->next->next->next [L1046] EXPR head->next->next->next->data [L1046] COND TRUE !(head->next->next->next->data != 3) [L1046] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "sll-queue-2.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.8s, OverallIterations: 23, TraceHistogramMax: 4, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1480 SDtfs, 1348 SDslu, 3989 SDs, 0 SdLazy, 4270 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 367 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 794 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 719 ConstructedInterpolants, 0 QuantifiedInterpolants, 415634 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 7 PerfectInterpolantSequences, 25/215 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...