/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=DEEPEST --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-circular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:46:45,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:46:45,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:46:45,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:46:45,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:46:45,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:46:45,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:46:45,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:46:45,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:46:45,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:46:45,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:46:45,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:46:45,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:46:45,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:46:45,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:46:45,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:46:45,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:46:45,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:46:45,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:46:45,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:46:45,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:46:45,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:46:45,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:46:45,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:46:45,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:46:45,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:46:45,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:46:45,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:46:45,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:46:45,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:46:45,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:46:45,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:46:45,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:46:45,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:46:45,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:46:45,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:46:45,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:46:45,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:46:45,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:46:45,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:46:45,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:46:45,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:46:45,939 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:46:45,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:46:45,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:46:45,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:46:45,944 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:46:45,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:46:45,945 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:46:45,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:46:45,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:46:45,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:46:45,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:46:45,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:46:45,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:46:45,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:46:45,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:46:45,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:46:45,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:46:45,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:46:45,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:46:45,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:46:45,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:46:45,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:45,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:46:45,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:46:45,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:46:45,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:46:45,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:46:45,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:46:45,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:46:45,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:46:46,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:46:46,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:46:46,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:46:46,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:46:46,406 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:46:46,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular-1.i [2020-10-27 19:46:46,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67fe61105/baf28f55dffe4bf9a62ffffc3c45dfc3/FLAGac32e84dd [2020-10-27 19:46:47,201 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:46:47,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-circular-1.i [2020-10-27 19:46:47,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67fe61105/baf28f55dffe4bf9a62ffffc3c45dfc3/FLAGac32e84dd [2020-10-27 19:46:47,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67fe61105/baf28f55dffe4bf9a62ffffc3c45dfc3 [2020-10-27 19:46:47,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:46:47,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:46:47,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:47,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:46:47,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:46:47,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:47" (1/1) ... [2020-10-27 19:46:47,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36fbb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:47, skipping insertion in model container [2020-10-27 19:46:47,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:47" (1/1) ... [2020-10-27 19:46:47,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:46:47,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:46:48,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:48,115 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:46:48,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:48,230 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:46:48,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48 WrapperNode [2020-10-27 19:46:48,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:48,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:46:48,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:46:48,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:46:48,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (1/1) ... [2020-10-27 19:46:48,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (1/1) ... [2020-10-27 19:46:48,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (1/1) ... [2020-10-27 19:46:48,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (1/1) ... [2020-10-27 19:46:48,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (1/1) ... [2020-10-27 19:46:48,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (1/1) ... [2020-10-27 19:46:48,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (1/1) ... [2020-10-27 19:46:48,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:48,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:48,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:48,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:48,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:48,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:48,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:48,405 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:48,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:48,949 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:48,949 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-27 19:46:48,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:48 BoogieIcfgContainer [2020-10-27 19:46:48,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:48,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:48,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:48,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:48,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:46:47" (1/3) ... [2020-10-27 19:46:48,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c883da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:48, skipping insertion in model container [2020-10-27 19:46:48,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:48" (2/3) ... [2020-10-27 19:46:48,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c883da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:48, skipping insertion in model container [2020-10-27 19:46:48,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:48" (3/3) ... [2020-10-27 19:46:48,960 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-circular-1.i [2020-10-27 19:46:48,975 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:48,980 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:48,993 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:49,020 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:49,021 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:49,021 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:49,021 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:49,021 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:49,021 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:49,021 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:49,022 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-27 19:46:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 19:46:49,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:49,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:49,053 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:49,059 INFO L82 PathProgramCache]: Analyzing trace with hash -323057978, now seen corresponding path program 1 times [2020-10-27 19:46:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:49,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37509922] [2020-10-27 19:46:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:49,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:49,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 19:46:49,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:49,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-27 19:46:49,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:49,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:49,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:46:49,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:49,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:46:49,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:49,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:49,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:49,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:49,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:46:49,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:49,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:49,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:49,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:49,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:49,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37509922] [2020-10-27 19:46:49,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:49,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:46:49,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797989171] [2020-10-27 19:46:49,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:46:49,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:49,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:46:49,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:49,798 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-27 19:46:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:49,928 INFO L93 Difference]: Finished difference Result 75 states and 118 transitions. [2020-10-27 19:46:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:46:49,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 19:46:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:49,940 INFO L225 Difference]: With dead ends: 75 [2020-10-27 19:46:49,940 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 19:46:49,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:49,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 19:46:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 19:46:49,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 19:46:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-27 19:46:49,990 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2020-10-27 19:46:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:49,991 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-27 19:46:49,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:46:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-27 19:46:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:46:49,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:49,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:49,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:49,993 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:49,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2142796056, now seen corresponding path program 1 times [2020-10-27 19:46:49,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:49,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084814814] [2020-10-27 19:46:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:50,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:50,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:46:50,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:50,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 19:46:50,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:50,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:50,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:50,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:50,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:50,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:50,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:50,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:50,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:50,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 19:46:50,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:50,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:50,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:50,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:50,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:50,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084814814] [2020-10-27 19:46:50,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:50,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:50,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371515526] [2020-10-27 19:46:50,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:50,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:50,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:50,425 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-10-27 19:46:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:50,579 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-27 19:46:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:50,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 19:46:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:50,581 INFO L225 Difference]: With dead ends: 47 [2020-10-27 19:46:50,582 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 19:46:50,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 19:46:50,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-10-27 19:46:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 19:46:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-27 19:46:50,592 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 13 [2020-10-27 19:46:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:50,593 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-27 19:46:50,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-27 19:46:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:50,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:50,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:50,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:50,594 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1634639351, now seen corresponding path program 1 times [2020-10-27 19:46:50,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:50,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916336124] [2020-10-27 19:46:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:50,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:50,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:50,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:50,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 19:46:50,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:50,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:50,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:50,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:50,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:50,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:50,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:50,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:50,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:50,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:50,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:50,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:50,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:50,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:50,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916336124] [2020-10-27 19:46:50,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:50,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:50,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023087118] [2020-10-27 19:46:50,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:50,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:50,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:50,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:50,954 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2020-10-27 19:46:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:51,049 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-27 19:46:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:51,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 19:46:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:51,051 INFO L225 Difference]: With dead ends: 75 [2020-10-27 19:46:51,051 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 19:46:51,052 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 [2020-10-27 19:46:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 19:46:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-27 19:46:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:46:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 19:46:51,061 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 16 [2020-10-27 19:46:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:51,062 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 19:46:51,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 19:46:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:46:51,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:51,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:51,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:51,064 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash -94271402, now seen corresponding path program 1 times [2020-10-27 19:46:51,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:51,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136165385] [2020-10-27 19:46:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:51,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:51,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:46:51,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:51,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 19:46:51,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:51,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:51,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:51,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:51,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:51,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:51,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136165385] [2020-10-27 19:46:51,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:51,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:51,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847826862] [2020-10-27 19:46:51,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:51,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:51,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:51,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:51,419 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 6 states. [2020-10-27 19:46:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:51,622 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-27 19:46:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:51,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 19:46:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:51,624 INFO L225 Difference]: With dead ends: 53 [2020-10-27 19:46:51,625 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 19:46:51,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 19:46:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 19:46:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:46:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-27 19:46:51,634 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 19 [2020-10-27 19:46:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:51,635 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-27 19:46:51,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-27 19:46:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:46:51,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:51,636 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:51,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:51,636 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash -260953347, now seen corresponding path program 1 times [2020-10-27 19:46:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:51,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586572456] [2020-10-27 19:46:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:51,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:51,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:46:51,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:51,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 19:46:51,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:51,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:51,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:51,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:51,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:51,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:51,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:51,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:51,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:51,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:51,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:51,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:51,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:51,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:51,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:51,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586572456] [2020-10-27 19:46:51,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:51,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:46:51,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895223654] [2020-10-27 19:46:51,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:51,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:51,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:51,883 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-10-27 19:46:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:52,024 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-10-27 19:46:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:52,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 19:46:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:52,026 INFO L225 Difference]: With dead ends: 67 [2020-10-27 19:46:52,026 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 19:46:52,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 19:46:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-10-27 19:46:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 19:46:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-27 19:46:52,036 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 19 [2020-10-27 19:46:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:52,036 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-27 19:46:52,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-27 19:46:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:46:52,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:52,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:52,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:52,038 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1259149770, now seen corresponding path program 1 times [2020-10-27 19:46:52,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:52,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381330965] [2020-10-27 19:46:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:52,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:52,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:46:52,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:52,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 19:46:52,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:46:52,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:52,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:52,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:52,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:52,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:52,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:52,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:52,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:52,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381330965] [2020-10-27 19:46:52,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:52,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:52,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875288150] [2020-10-27 19:46:52,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:52,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:52,645 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 4 states. [2020-10-27 19:46:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:52,748 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-10-27 19:46:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:52,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 19:46:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:52,750 INFO L225 Difference]: With dead ends: 100 [2020-10-27 19:46:52,750 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 19:46:52,751 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 [2020-10-27 19:46:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 19:46:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2020-10-27 19:46:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 19:46:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-27 19:46:52,761 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 23 [2020-10-27 19:46:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:52,762 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-27 19:46:52,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-27 19:46:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:52,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:52,765 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] [2020-10-27 19:46:52,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:52,765 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:52,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:52,766 INFO L82 PathProgramCache]: Analyzing trace with hash -136050517, now seen corresponding path program 1 times [2020-10-27 19:46:52,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:52,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572356982] [2020-10-27 19:46:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:52,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:53,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:53,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:53,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:53,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 19:46:53,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:53,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:46:53,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:53,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:53,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:53,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:53,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:53,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:53,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:53,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:53,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:53,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572356982] [2020-10-27 19:46:53,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:53,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:53,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345023712] [2020-10-27 19:46:53,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:53,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:53,409 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 8 states. [2020-10-27 19:46:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:53,725 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-10-27 19:46:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:53,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 19:46:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:53,728 INFO L225 Difference]: With dead ends: 81 [2020-10-27 19:46:53,728 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 19:46:53,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 19:46:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-27 19:46:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 19:46:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-27 19:46:53,740 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 25 [2020-10-27 19:46:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:53,740 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-27 19:46:53,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-27 19:46:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:53,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:53,742 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:53,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:53,742 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash -302732462, now seen corresponding path program 2 times [2020-10-27 19:46:53,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:53,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79547581] [2020-10-27 19:46:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:53,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:54,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:54,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-27 19:46:54,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:54,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:54,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:54,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:54,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:54,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:54,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:54,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:46:54,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:54,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:54,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:54,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79547581] [2020-10-27 19:46:54,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:54,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:46:54,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660391541] [2020-10-27 19:46:54,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:54,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:54,270 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 7 states. [2020-10-27 19:46:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:54,448 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-27 19:46:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:54,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 19:46:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:54,450 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:46:54,450 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 19:46:54,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 19:46:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-27 19:46:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 19:46:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-10-27 19:46:54,469 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 25 [2020-10-27 19:46:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:54,470 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-10-27 19:46:54,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-10-27 19:46:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:54,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:54,473 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] [2020-10-27 19:46:54,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:54,474 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash -101173952, now seen corresponding path program 2 times [2020-10-27 19:46:54,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:54,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774160467] [2020-10-27 19:46:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:54,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:54,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-27 19:46:54,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:54,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:55,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:55,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:55,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:55,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:55,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:55,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:55,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:55,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:55,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:55,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:55,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774160467] [2020-10-27 19:46:55,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:55,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:55,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061009884] [2020-10-27 19:46:55,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:55,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:55,341 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 10 states. [2020-10-27 19:46:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:55,674 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2020-10-27 19:46:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:55,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 19:46:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:55,676 INFO L225 Difference]: With dead ends: 97 [2020-10-27 19:46:55,676 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 19:46:55,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 19:46:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-10-27 19:46:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:46:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-10-27 19:46:55,687 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 31 [2020-10-27 19:46:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:55,687 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-10-27 19:46:55,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-10-27 19:46:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:55,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:55,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:55,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:55,689 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1964623457, now seen corresponding path program 1 times [2020-10-27 19:46:55,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:55,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555972691] [2020-10-27 19:46:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:55,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:55,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:56,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:56,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:56,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-10-27 19:46:56,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:56,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:56,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 19:46:56,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 19:46:56,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:57,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:57,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:57,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:57,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:57,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:46:57,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:57,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:57,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:57,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:57,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:57,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555972691] [2020-10-27 19:46:57,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:57,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:46:57,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454443780] [2020-10-27 19:46:57,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:57,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:57,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:57,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:57,064 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 7 states. [2020-10-27 19:46:57,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:57,199 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-10-27 19:46:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:57,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 19:46:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:57,203 INFO L225 Difference]: With dead ends: 95 [2020-10-27 19:46:57,203 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 19:46:57,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 19:46:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 19:46:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-27 19:46:57,218 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 32 [2020-10-27 19:46:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:57,219 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-27 19:46:57,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-27 19:46:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:57,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:57,222 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:57,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:57,223 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:57,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1192796396, now seen corresponding path program 1 times [2020-10-27 19:46:57,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:57,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100225009] [2020-10-27 19:46:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:57,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:57,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:57,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:57,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-27 19:46:57,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:46:57,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:58,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:58,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:58,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:58,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:58,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:58,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100225009] [2020-10-27 19:46:58,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:58,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:58,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882997784] [2020-10-27 19:46:58,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:58,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:58,229 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 11 states. [2020-10-27 19:46:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:58,595 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-10-27 19:46:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:58,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 19:46:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:58,598 INFO L225 Difference]: With dead ends: 100 [2020-10-27 19:46:58,598 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 19:46:58,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 19:46:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-10-27 19:46:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 19:46:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-27 19:46:58,612 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 32 [2020-10-27 19:46:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:58,613 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-27 19:46:58,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-27 19:46:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:58,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:58,617 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:58,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:58,617 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1306519326, now seen corresponding path program 2 times [2020-10-27 19:46:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:58,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291254914] [2020-10-27 19:46:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:58,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:58,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:58,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:58,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 19:46:58,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:58,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:58,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:58,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:46:58,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:59,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:59,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:59,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:59,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:59,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:46:59,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:59,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:59,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:59,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:59,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:59,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291254914] [2020-10-27 19:46:59,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:59,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:59,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301865155] [2020-10-27 19:46:59,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:59,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:59,435 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 10 states. [2020-10-27 19:46:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:59,755 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2020-10-27 19:46:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:59,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 19:46:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:59,758 INFO L225 Difference]: With dead ends: 107 [2020-10-27 19:46:59,758 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 19:46:59,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 19:46:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2020-10-27 19:46:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:46:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-27 19:46:59,773 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 32 [2020-10-27 19:46:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:59,774 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-27 19:46:59,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-27 19:46:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:59,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:59,775 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] [2020-10-27 19:46:59,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:59,775 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash -394414092, now seen corresponding path program 1 times [2020-10-27 19:46:59,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:59,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238506198] [2020-10-27 19:46:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:59,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:00,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:47:00,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:00,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 19:47:00,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:00,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:00,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:00,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:00,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:00,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:00,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:00,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:00,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:00,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:47:00,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:00,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:00,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:00,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:00,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:00,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238506198] [2020-10-27 19:47:00,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:00,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:00,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665517337] [2020-10-27 19:47:00,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:00,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:00,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:00,827 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 11 states. [2020-10-27 19:47:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:01,219 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2020-10-27 19:47:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:01,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 19:47:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:01,221 INFO L225 Difference]: With dead ends: 105 [2020-10-27 19:47:01,221 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 19:47:01,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 19:47:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2020-10-27 19:47:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 19:47:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-10-27 19:47:01,233 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 34 [2020-10-27 19:47:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:01,234 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-10-27 19:47:01,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-10-27 19:47:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:47:01,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:01,236 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:01,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:47:01,236 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:01,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:01,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2033966613, now seen corresponding path program 3 times [2020-10-27 19:47:01,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:01,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106143546] [2020-10-27 19:47:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:01,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:01,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:47:01,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:01,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-27 19:47:01,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:01,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:01,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:01,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:47:01,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:02,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:02,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:02,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:02,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:02,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:02,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:47:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:02,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106143546] [2020-10-27 19:47:02,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:02,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:02,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272368026] [2020-10-27 19:47:02,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:02,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:02,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:02,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:02,148 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 12 states. [2020-10-27 19:47:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:02,566 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-10-27 19:47:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:02,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-27 19:47:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:02,568 INFO L225 Difference]: With dead ends: 114 [2020-10-27 19:47:02,568 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 19:47:02,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 19:47:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2020-10-27 19:47:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 19:47:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-27 19:47:02,581 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 37 [2020-10-27 19:47:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:02,581 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-27 19:47:02,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-27 19:47:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:47:02,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:02,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:02,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:47:02,583 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1716652633, now seen corresponding path program 1 times [2020-10-27 19:47:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:02,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916863468] [2020-10-27 19:47:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:02,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:47:03,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:03,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-27 19:47:03,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:03,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:03,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:47:03,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:03,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:03,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:03,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:03,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:03,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:03,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916863468] [2020-10-27 19:47:03,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:03,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:03,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469109242] [2020-10-27 19:47:03,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:03,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:03,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:03,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:03,797 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 12 states. [2020-10-27 19:47:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:04,429 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2020-10-27 19:47:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:04,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-27 19:47:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:04,431 INFO L225 Difference]: With dead ends: 164 [2020-10-27 19:47:04,431 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 19:47:04,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 19:47:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-27 19:47:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 19:47:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-10-27 19:47:04,444 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 37 [2020-10-27 19:47:04,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:04,446 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-10-27 19:47:04,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-10-27 19:47:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:04,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:04,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:04,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:47:04,447 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash -307330326, now seen corresponding path program 1 times [2020-10-27 19:47:04,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:04,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732256305] [2020-10-27 19:47:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:04,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:04,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:04,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:04,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-27 19:47:04,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:04,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:04,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:04,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:47:04,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:05,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:05,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:05,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:05,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:05,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:05,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:05,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:05,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:05,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:05,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:05,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:05,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732256305] [2020-10-27 19:47:05,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:05,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:05,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826587761] [2020-10-27 19:47:05,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:05,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:05,260 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 10 states. [2020-10-27 19:47:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:05,682 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2020-10-27 19:47:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:47:05,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 19:47:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:05,683 INFO L225 Difference]: With dead ends: 124 [2020-10-27 19:47:05,683 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 19:47:05,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 19:47:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 19:47:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 19:47:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-10-27 19:47:05,704 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 38 [2020-10-27 19:47:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:05,704 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-10-27 19:47:05,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-10-27 19:47:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:05,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:05,705 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:05,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:47:05,707 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:05,708 INFO L82 PathProgramCache]: Analyzing trace with hash 572051679, now seen corresponding path program 3 times [2020-10-27 19:47:05,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:05,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024391415] [2020-10-27 19:47:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:05,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:06,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:06,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:06,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-27 19:47:06,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:06,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:06,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:06,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:47:06,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:06,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:06,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:06,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:06,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:06,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:06,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:06,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:06,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024391415] [2020-10-27 19:47:06,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:06,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:06,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543374152] [2020-10-27 19:47:06,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:06,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:06,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:06,779 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 12 states. [2020-10-27 19:47:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:07,369 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2020-10-27 19:47:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:07,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 19:47:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:07,374 INFO L225 Difference]: With dead ends: 127 [2020-10-27 19:47:07,374 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 19:47:07,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:07,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 19:47:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2020-10-27 19:47:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 19:47:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2020-10-27 19:47:07,387 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 38 [2020-10-27 19:47:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:07,387 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2020-10-27 19:47:07,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2020-10-27 19:47:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:07,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:07,388 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:07,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:47:07,388 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:07,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1223599895, now seen corresponding path program 4 times [2020-10-27 19:47:07,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:07,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767314571] [2020-10-27 19:47:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:07,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:07,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:07,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:07,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-27 19:47:07,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:07,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:07,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:07,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:47:07,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:08,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:08,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:08,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:08,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:08,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:08,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:08,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:08,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:08,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767314571] [2020-10-27 19:47:08,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:08,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:08,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928975324] [2020-10-27 19:47:08,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:08,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:08,531 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 13 states. [2020-10-27 19:47:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:09,153 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2020-10-27 19:47:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:09,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 19:47:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:09,155 INFO L225 Difference]: With dead ends: 132 [2020-10-27 19:47:09,155 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 19:47:09,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 19:47:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-10-27 19:47:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 19:47:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-10-27 19:47:09,176 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 38 [2020-10-27 19:47:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:09,176 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-10-27 19:47:09,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:09,177 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-10-27 19:47:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:09,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:09,177 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:09,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:47:09,180 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash 310522227, now seen corresponding path program 5 times [2020-10-27 19:47:09,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:09,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43559588] [2020-10-27 19:47:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:09,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:09,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:09,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:09,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 19:47:09,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:47:09,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:09,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:09,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:09,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:09,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:09,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:09,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:10,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43559588] [2020-10-27 19:47:10,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:10,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:10,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746924585] [2020-10-27 19:47:10,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:10,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:10,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:10,017 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 12 states. [2020-10-27 19:47:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:10,478 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-27 19:47:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:10,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 19:47:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:10,479 INFO L225 Difference]: With dead ends: 141 [2020-10-27 19:47:10,479 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 19:47:10,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 19:47:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2020-10-27 19:47:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 19:47:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-10-27 19:47:10,492 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 38 [2020-10-27 19:47:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:10,492 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-10-27 19:47:10,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-10-27 19:47:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:47:10,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:10,493 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:10,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:47:10,493 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:10,494 INFO L82 PathProgramCache]: Analyzing trace with hash -887495937, now seen corresponding path program 1 times [2020-10-27 19:47:10,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:10,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108642393] [2020-10-27 19:47:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:10,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:11,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:11,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:47:11,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:11,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-27 19:47:11,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:11,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:11,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:11,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:47:11,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:11,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:11,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:11,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:11,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:11,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:11,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:11,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:11,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:11,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108642393] [2020-10-27 19:47:11,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:11,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:11,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939419265] [2020-10-27 19:47:11,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:11,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:11,836 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 13 states. [2020-10-27 19:47:12,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:12,482 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2020-10-27 19:47:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:12,483 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 19:47:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:12,484 INFO L225 Difference]: With dead ends: 139 [2020-10-27 19:47:12,484 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 19:47:12,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 19:47:12,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 114. [2020-10-27 19:47:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 19:47:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2020-10-27 19:47:12,499 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 40 [2020-10-27 19:47:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:12,499 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2020-10-27 19:47:12,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2020-10-27 19:47:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:47:12,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:12,500 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:12,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:47:12,501 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash 230080777, now seen corresponding path program 2 times [2020-10-27 19:47:12,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:12,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381277160] [2020-10-27 19:47:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:12,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:12,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:47:12,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:12,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-27 19:47:12,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:12,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:12,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:12,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:47:12,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:13,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:13,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:13,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:13,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:13,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:13,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:13,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:13,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:13,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:13,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:13,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:13,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381277160] [2020-10-27 19:47:13,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:13,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:13,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802791857] [2020-10-27 19:47:13,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:13,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:13,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:13,325 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 12 states. [2020-10-27 19:47:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:13,833 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2020-10-27 19:47:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:13,834 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 19:47:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:13,836 INFO L225 Difference]: With dead ends: 148 [2020-10-27 19:47:13,836 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 19:47:13,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 19:47:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2020-10-27 19:47:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 19:47:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-10-27 19:47:13,848 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 40 [2020-10-27 19:47:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:13,848 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-10-27 19:47:13,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-10-27 19:47:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:13,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:13,849 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:13,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:47:13,849 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:13,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1420874538, now seen corresponding path program 4 times [2020-10-27 19:47:13,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:13,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351492739] [2020-10-27 19:47:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:13,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:14,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:14,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:14,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:14,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-27 19:47:14,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:47:14,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:15,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:15,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:15,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:15,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:15,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:15,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:15,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:15,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:15,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:15,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351492739] [2020-10-27 19:47:15,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:15,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:15,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232535249] [2020-10-27 19:47:15,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:15,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:15,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:15,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:15,437 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 13 states. [2020-10-27 19:47:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:16,084 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2020-10-27 19:47:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:16,085 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 19:47:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:16,087 INFO L225 Difference]: With dead ends: 152 [2020-10-27 19:47:16,087 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 19:47:16,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 19:47:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 117. [2020-10-27 19:47:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 19:47:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-10-27 19:47:16,100 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 43 [2020-10-27 19:47:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:16,100 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-10-27 19:47:16,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-10-27 19:47:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:16,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:16,101 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 19:47:16,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:47:16,101 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1103560558, now seen corresponding path program 1 times [2020-10-27 19:47:16,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:16,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606641956] [2020-10-27 19:47:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:16,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:16,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:16,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-27 19:47:16,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:16,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:16,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:16,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:47:16,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:17,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:17,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:17,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:17,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:17,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:17,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:17,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:17,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:17,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:17,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:17,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:17,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606641956] [2020-10-27 19:47:17,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:17,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:17,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455796043] [2020-10-27 19:47:17,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:17,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:17,601 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 13 states. [2020-10-27 19:47:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:18,682 INFO L93 Difference]: Finished difference Result 176 states and 206 transitions. [2020-10-27 19:47:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:47:18,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 19:47:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:18,684 INFO L225 Difference]: With dead ends: 176 [2020-10-27 19:47:18,684 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 19:47:18,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:47:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 19:47:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 122. [2020-10-27 19:47:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:47:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2020-10-27 19:47:18,697 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 43 [2020-10-27 19:47:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:18,698 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2020-10-27 19:47:18,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2020-10-27 19:47:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:18,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:18,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 19:47:18,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:47:18,699 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:18,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:18,700 INFO L82 PathProgramCache]: Analyzing trace with hash 244968740, now seen corresponding path program 2 times [2020-10-27 19:47:18,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:18,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679080198] [2020-10-27 19:47:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:19,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:19,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:19,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:19,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-27 19:47:19,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:19,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:19,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:19,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:47:19,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:19,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:19,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:19,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:19,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:19,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:19,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:19,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:19,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:19,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:19,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:19,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:47:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:20,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679080198] [2020-10-27 19:47:20,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:20,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168321760] [2020-10-27 19:47:20,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:20,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:20,016 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand 12 states. [2020-10-27 19:47:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:20,520 INFO L93 Difference]: Finished difference Result 181 states and 215 transitions. [2020-10-27 19:47:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:20,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-27 19:47:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:20,522 INFO L225 Difference]: With dead ends: 181 [2020-10-27 19:47:20,522 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 19:47:20,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 19:47:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 109. [2020-10-27 19:47:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 19:47:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-10-27 19:47:20,534 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 43 [2020-10-27 19:47:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:20,535 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-10-27 19:47:20,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-10-27 19:47:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:20,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:20,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 19:47:20,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:47:20,536 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash -329683868, now seen corresponding path program 3 times [2020-10-27 19:47:20,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:20,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948275943] [2020-10-27 19:47:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:20,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:21,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:21,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:21,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-27 19:47:21,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:21,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:21,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:21,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:47:21,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:21,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:21,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:21,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:21,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:21,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:21,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:21,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:21,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:21,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:21,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:21,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948275943] [2020-10-27 19:47:21,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:21,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:21,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545337939] [2020-10-27 19:47:21,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:21,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:21,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:21,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:21,859 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 13 states. [2020-10-27 19:47:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:22,664 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2020-10-27 19:47:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:22,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 19:47:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:22,666 INFO L225 Difference]: With dead ends: 149 [2020-10-27 19:47:22,666 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 19:47:22,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 19:47:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2020-10-27 19:47:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:47:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2020-10-27 19:47:22,679 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 43 [2020-10-27 19:47:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:22,679 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2020-10-27 19:47:22,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2020-10-27 19:47:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:47:22,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:22,680 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:22,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:47:22,681 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:22,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:22,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2133315467, now seen corresponding path program 2 times [2020-10-27 19:47:22,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:22,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121657938] [2020-10-27 19:47:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:22,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:47:23,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:23,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-27 19:47:23,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:47:23,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:23,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:23,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:23,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:23,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:23,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:23,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:23,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:23,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121657938] [2020-10-27 19:47:23,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:23,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:23,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174849778] [2020-10-27 19:47:23,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:23,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:23,770 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand 12 states. [2020-10-27 19:47:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:24,187 INFO L93 Difference]: Finished difference Result 150 states and 176 transitions. [2020-10-27 19:47:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:24,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-27 19:47:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:24,189 INFO L225 Difference]: With dead ends: 150 [2020-10-27 19:47:24,189 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 19:47:24,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 19:47:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2020-10-27 19:47:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:47:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2020-10-27 19:47:24,205 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 44 [2020-10-27 19:47:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:24,205 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2020-10-27 19:47:24,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2020-10-27 19:47:24,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:47:24,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:24,206 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2020-10-27 19:47:24,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:47:24,206 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:24,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:24,207 INFO L82 PathProgramCache]: Analyzing trace with hash 445149105, now seen corresponding path program 1 times [2020-10-27 19:47:24,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:24,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286728802] [2020-10-27 19:47:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:24,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:24,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:24,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:47:24,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:24,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-27 19:47:24,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:24,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:24,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:24,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:47:24,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:24,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:24,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:24,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:24,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:24,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:24,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:25,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286728802] [2020-10-27 19:47:25,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:25,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:25,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831612065] [2020-10-27 19:47:25,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:25,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:25,010 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand 11 states. [2020-10-27 19:47:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:25,501 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2020-10-27 19:47:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:25,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-27 19:47:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:25,503 INFO L225 Difference]: With dead ends: 173 [2020-10-27 19:47:25,504 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 19:47:25,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 19:47:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 144. [2020-10-27 19:47:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 19:47:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2020-10-27 19:47:25,519 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 44 [2020-10-27 19:47:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:25,520 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2020-10-27 19:47:25,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2020-10-27 19:47:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:47:25,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:25,521 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2020-10-27 19:47:25,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:47:25,521 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1016358507, now seen corresponding path program 1 times [2020-10-27 19:47:25,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:25,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840175958] [2020-10-27 19:47:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:25,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:26,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:47:26,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:26,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-27 19:47:26,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:47:26,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:26,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:26,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:26,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:26,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:26,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840175958] [2020-10-27 19:47:26,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:26,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:26,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279996803] [2020-10-27 19:47:26,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:26,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:26,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:26,690 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 13 states. [2020-10-27 19:47:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:27,202 INFO L93 Difference]: Finished difference Result 180 states and 210 transitions. [2020-10-27 19:47:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:27,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 19:47:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:27,204 INFO L225 Difference]: With dead ends: 180 [2020-10-27 19:47:27,205 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 19:47:27,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 19:47:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 145. [2020-10-27 19:47:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 19:47:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2020-10-27 19:47:27,221 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 45 [2020-10-27 19:47:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:27,221 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2020-10-27 19:47:27,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2020-10-27 19:47:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:47:27,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:27,222 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2020-10-27 19:47:27,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:47:27,222 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:27,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:27,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1908453451, now seen corresponding path program 1 times [2020-10-27 19:47:27,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:27,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492930402] [2020-10-27 19:47:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:27,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:27,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:47:27,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:27,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-27 19:47:27,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:47:27,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:28,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:28,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:28,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:28,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:28,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:28,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:28,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:28,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492930402] [2020-10-27 19:47:28,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:28,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:28,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345862078] [2020-10-27 19:47:28,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:28,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:28,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:28,425 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand 12 states. [2020-10-27 19:47:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:29,008 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2020-10-27 19:47:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:29,009 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 19:47:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:29,011 INFO L225 Difference]: With dead ends: 179 [2020-10-27 19:47:29,011 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 19:47:29,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 19:47:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2020-10-27 19:47:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 19:47:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2020-10-27 19:47:29,030 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 47 [2020-10-27 19:47:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:29,030 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2020-10-27 19:47:29,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2020-10-27 19:47:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:47:29,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:29,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:29,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:47:29,031 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash -105653713, now seen corresponding path program 4 times [2020-10-27 19:47:29,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:29,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796465038] [2020-10-27 19:47:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:29,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:29,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:29,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:47:29,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:29,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-27 19:47:29,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:47:29,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:30,421 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-27 19:47:30,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:30,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:30,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:30,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:30,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:30,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:30,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:30,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:30,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:30,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:30,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796465038] [2020-10-27 19:47:30,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:30,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:30,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808336738] [2020-10-27 19:47:30,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:30,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:30,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:30,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:30,815 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand 14 states. [2020-10-27 19:47:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:31,493 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2020-10-27 19:47:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:31,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 19:47:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:31,495 INFO L225 Difference]: With dead ends: 217 [2020-10-27 19:47:31,495 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 19:47:31,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 19:47:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 128. [2020-10-27 19:47:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 19:47:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2020-10-27 19:47:31,512 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 49 [2020-10-27 19:47:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:31,513 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2020-10-27 19:47:31,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2020-10-27 19:47:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:47:31,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:31,513 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:31,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:47:31,514 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:31,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1605482048, now seen corresponding path program 3 times [2020-10-27 19:47:31,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:31,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711474913] [2020-10-27 19:47:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:31,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:32,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:47:32,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:32,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-10-27 19:47:32,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:32,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:32,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:32,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:32,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:32,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:32,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:32,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:32,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:32,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:32,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:32,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:32,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711474913] [2020-10-27 19:47:32,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:32,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:32,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637995558] [2020-10-27 19:47:32,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:32,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:32,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:32,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:32,903 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand 14 states. [2020-10-27 19:47:33,254 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-27 19:47:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:33,579 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2020-10-27 19:47:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:33,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-27 19:47:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:33,581 INFO L225 Difference]: With dead ends: 171 [2020-10-27 19:47:33,581 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 19:47:33,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 19:47:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 134. [2020-10-27 19:47:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 19:47:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2020-10-27 19:47:33,598 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 50 [2020-10-27 19:47:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:33,598 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2020-10-27 19:47:33,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2020-10-27 19:47:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:47:33,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:33,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-27 19:47:33,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:47:33,600 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 972982524, now seen corresponding path program 1 times [2020-10-27 19:47:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:33,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330863601] [2020-10-27 19:47:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:34,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:34,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:47:34,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:34,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-27 19:47:34,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:34,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:34,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:34,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:34,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:34,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:34,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:34,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:34,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:34,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:34,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:47:34,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:35,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330863601] [2020-10-27 19:47:35,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:35,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:35,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102491256] [2020-10-27 19:47:35,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:35,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:35,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:35,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:35,003 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand 14 states. [2020-10-27 19:47:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:35,827 INFO L93 Difference]: Finished difference Result 189 states and 217 transitions. [2020-10-27 19:47:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:35,828 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-27 19:47:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:35,830 INFO L225 Difference]: With dead ends: 189 [2020-10-27 19:47:35,830 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 19:47:35,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 19:47:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-27 19:47:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 19:47:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-10-27 19:47:35,848 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 50 [2020-10-27 19:47:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:35,848 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-10-27 19:47:35,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-10-27 19:47:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:47:35,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:35,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-27 19:47:35,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:47:35,850 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1199850682, now seen corresponding path program 2 times [2020-10-27 19:47:35,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:35,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822986910] [2020-10-27 19:47:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:35,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:36,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:36,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:47:36,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:36,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-27 19:47:36,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:36,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:36,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:36,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:36,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:37,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:37,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:37,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:37,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:37,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:37,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:37,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822986910] [2020-10-27 19:47:37,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:37,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140904747] [2020-10-27 19:47:37,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:37,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:37,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:37,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:37,212 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 13 states. [2020-10-27 19:47:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:37,854 INFO L93 Difference]: Finished difference Result 202 states and 233 transitions. [2020-10-27 19:47:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:37,855 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-27 19:47:37,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:37,856 INFO L225 Difference]: With dead ends: 202 [2020-10-27 19:47:37,857 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 19:47:37,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 19:47:37,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2020-10-27 19:47:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 19:47:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2020-10-27 19:47:37,877 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 50 [2020-10-27 19:47:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:37,878 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2020-10-27 19:47:37,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:37,878 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2020-10-27 19:47:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:47:37,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:37,879 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:37,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:47:37,879 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash 109867541, now seen corresponding path program 4 times [2020-10-27 19:47:37,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:37,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107303322] [2020-10-27 19:47:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:37,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:38,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:47:38,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:38,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-27 19:47:38,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:38,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:38,480 ERROR L253 erpolLogProxyWrapper]: Interpolant 43 not inductive [2020-10-27 19:47:38,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:47:38,482 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 19:47:38,487 INFO L168 Benchmark]: Toolchain (without parser) took 50972.90 ms. Allocated memory was 166.7 MB in the beginning and 585.1 MB in the end (delta: 418.4 MB). Free memory was 140.3 MB in the beginning and 501.6 MB in the end (delta: -361.3 MB). Peak memory consumption was 345.3 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:38,487 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 166.7 MB. Free memory is still 137.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:47:38,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 706.57 ms. Allocated memory is still 166.7 MB. Free memory was 139.7 MB in the beginning and 117.8 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:38,488 INFO L168 Benchmark]: Boogie Preprocessor took 70.46 ms. Allocated memory is still 166.7 MB. Free memory was 117.8 MB in the beginning and 115.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:38,489 INFO L168 Benchmark]: RCFGBuilder took 647.17 ms. Allocated memory is still 166.7 MB. Free memory was 115.0 MB in the beginning and 108.6 MB in the end (delta: 6.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:38,489 INFO L168 Benchmark]: TraceAbstraction took 49532.93 ms. Allocated memory was 166.7 MB in the beginning and 585.1 MB in the end (delta: 418.4 MB). Free memory was 108.0 MB in the beginning and 501.6 MB in the end (delta: -393.6 MB). Peak memory consumption was 311.6 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:38,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 166.7 MB. Free memory is still 137.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 706.57 ms. Allocated memory is still 166.7 MB. Free memory was 139.7 MB in the beginning and 117.8 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.46 ms. Allocated memory is still 166.7 MB. Free memory was 117.8 MB in the beginning and 115.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 647.17 ms. Allocated memory is still 166.7 MB. Free memory was 115.0 MB in the beginning and 108.6 MB in the end (delta: 6.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 49532.93 ms. Allocated memory was 166.7 MB in the beginning and 585.1 MB in the end (delta: 418.4 MB). Free memory was 108.0 MB in the beginning and 501.6 MB in the end (delta: -393.6 MB). Peak memory consumption was 311.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...