/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:05:35,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:05:35,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:05:35,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:05:35,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:05:35,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:05:35,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:05:35,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:05:35,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:05:35,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:05:35,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:05:35,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:05:35,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:05:35,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:05:35,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:05:35,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:05:35,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:05:35,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:05:35,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:05:35,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:05:35,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:05:35,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:05:35,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:05:35,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:05:35,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:05:35,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:05:35,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:05:35,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:05:35,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:05:35,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:05:35,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:05:35,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:05:35,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:05:35,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:05:35,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:05:35,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:05:35,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:05:35,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:05:35,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:05:35,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:05:35,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:05:35,144 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 01:05:35,176 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:05:35,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:05:35,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:05:35,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:05:35,180 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:05:35,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:05:35,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:05:35,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:05:35,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:05:35,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:05:35,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:05:35,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:05:35,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:05:35,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:05:35,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:05:35,183 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:05:35,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:05:35,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:05:35,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:05:35,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:05:35,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:05:35,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:35,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:05:35,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:05:35,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:05:35,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:05:35,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:05:35,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:05:35,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:05:35,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:05:35,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:05:35,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:05:35,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:05:35,702 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:05:35,702 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:05:35,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-27 01:05:35,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2df6c489b/384b76868a5d4ef78d7d9a70ca3fe832/FLAG375804773 [2020-10-27 01:05:36,578 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:05:36,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-27 01:05:36,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2df6c489b/384b76868a5d4ef78d7d9a70ca3fe832/FLAG375804773 [2020-10-27 01:05:36,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2df6c489b/384b76868a5d4ef78d7d9a70ca3fe832 [2020-10-27 01:05:36,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:05:36,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:05:36,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:36,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:05:36,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:05:36,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:36" (1/1) ... [2020-10-27 01:05:36,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6006a8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:36, skipping insertion in model container [2020-10-27 01:05:36,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:36" (1/1) ... [2020-10-27 01:05:36,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:05:36,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:05:37,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:37,288 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:05:37,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:37,447 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:05:37,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37 WrapperNode [2020-10-27 01:05:37,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:37,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:05:37,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:05:37,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:05:37,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (1/1) ... [2020-10-27 01:05:37,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (1/1) ... [2020-10-27 01:05:37,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (1/1) ... [2020-10-27 01:05:37,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (1/1) ... [2020-10-27 01:05:37,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (1/1) ... [2020-10-27 01:05:37,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (1/1) ... [2020-10-27 01:05:37,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (1/1) ... [2020-10-27 01:05:37,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:05:37,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:05:37,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:05:37,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:05:37,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (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 01:05:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:05:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:05:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:05:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:05:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:05:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:05:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:05:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:05:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:05:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:05:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:05:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:05:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:05:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:05:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:05:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:05:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:05:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:05:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:05:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:05:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:05:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:05:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:05:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:05:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:05:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:05:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:05:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:05:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:05:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:05:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:05:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:05:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:05:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:05:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:05:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:05:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:05:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:05:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:05:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:05:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:05:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:05:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:05:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:05:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:05:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:05:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:05:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:05:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:05:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:05:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:05:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:05:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:05:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:05:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:05:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:05:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:05:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:05:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:05:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:05:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:05:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:05:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:05:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:05:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:05:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:05:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:05:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:05:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:05:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:05:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:05:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:05:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:05:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:05:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:05:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:05:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:05:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:05:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:05:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:05:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:05:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:05:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:05:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:05:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:05:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:05:37,610 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:05:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:05:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:05:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:05:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:05:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:05:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:05:37,611 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:05:37,612 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:05:37,612 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:05:37,612 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:05:37,612 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:05:37,612 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:05:37,612 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:05:37,612 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:05:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:05:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:05:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:05:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:05:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:05:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:05:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:05:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:05:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:05:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:05:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:05:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:05:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:05:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:05:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:05:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:05:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:05:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:05:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:05:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:05:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:05:37,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:05:38,300 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:05:38,300 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-27 01:05:38,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:38 BoogieIcfgContainer [2020-10-27 01:05:38,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:05:38,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:05:38,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:05:38,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:05:38,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:05:36" (1/3) ... [2020-10-27 01:05:38,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec2456d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:38, skipping insertion in model container [2020-10-27 01:05:38,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:37" (2/3) ... [2020-10-27 01:05:38,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec2456d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:38, skipping insertion in model container [2020-10-27 01:05:38,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:38" (3/3) ... [2020-10-27 01:05:38,318 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-10-27 01:05:38,331 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:05:38,340 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:05:38,354 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:05:38,395 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:05:38,396 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:05:38,396 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:05:38,396 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:05:38,402 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:05:38,403 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:05:38,403 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:05:38,403 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:05:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-10-27 01:05:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 01:05:38,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:38,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:38,441 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1010618624, now seen corresponding path program 1 times [2020-10-27 01:05:38,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:38,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181311201] [2020-10-27 01:05:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:38,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:38,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:38,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:05:38,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:38,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 01:05:38,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:05:38,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:05:38,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:38,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:38,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:38,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:38,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:38,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:05:38,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:38,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:38,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:38,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:38,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:38,986 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 01:05:38,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181311201] [2020-10-27 01:05:38,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:38,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:38,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334087010] [2020-10-27 01:05:38,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:38,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:39,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:39,020 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2020-10-27 01:05:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:39,358 INFO L93 Difference]: Finished difference Result 181 states and 328 transitions. [2020-10-27 01:05:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:39,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-27 01:05:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:39,370 INFO L225 Difference]: With dead ends: 181 [2020-10-27 01:05:39,370 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 01:05:39,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:39,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 01:05:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-10-27 01:05:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:05:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-27 01:05:39,424 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 10 [2020-10-27 01:05:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:39,424 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-27 01:05:39,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-27 01:05:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:39,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:39,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:05:39,426 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:39,427 INFO L82 PathProgramCache]: Analyzing trace with hash 742122061, now seen corresponding path program 1 times [2020-10-27 01:05:39,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:39,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046797844] [2020-10-27 01:05:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:39,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:39,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:39,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-27 01:05:39,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:39,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:39,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:39,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:39,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:39,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:05:39,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:39,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:39,843 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 01:05:39,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046797844] [2020-10-27 01:05:39,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:39,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:39,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179647575] [2020-10-27 01:05:39,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:39,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:39,860 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 5 states. [2020-10-27 01:05:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:40,179 INFO L93 Difference]: Finished difference Result 181 states and 237 transitions. [2020-10-27 01:05:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:40,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:05:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:40,182 INFO L225 Difference]: With dead ends: 181 [2020-10-27 01:05:40,182 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:05:40,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:05:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2020-10-27 01:05:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:05:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-10-27 01:05:40,202 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 16 [2020-10-27 01:05:40,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:40,202 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-10-27 01:05:40,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-10-27 01:05:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:40,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:40,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:40,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:05:40,207 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:40,207 INFO L82 PathProgramCache]: Analyzing trace with hash 743969103, now seen corresponding path program 1 times [2020-10-27 01:05:40,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:40,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248007543] [2020-10-27 01:05:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:40,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:40,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:40,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 01:05:40,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:40,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:40,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:40,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:40,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:40,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:40,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:05:40,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:40,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:40,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:40,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:40,496 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 01:05:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248007543] [2020-10-27 01:05:40,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:40,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:40,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287538220] [2020-10-27 01:05:40,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:40,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:40,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:40,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:40,500 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 5 states. [2020-10-27 01:05:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:41,014 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2020-10-27 01:05:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:41,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:05:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:41,016 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:05:41,017 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:05:41,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:05:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 76. [2020-10-27 01:05:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:05:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-10-27 01:05:41,030 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 16 [2020-10-27 01:05:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:41,031 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-10-27 01:05:41,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-10-27 01:05:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:41,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:41,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:41,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:05:41,032 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1775990831, now seen corresponding path program 1 times [2020-10-27 01:05:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:41,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803932313] [2020-10-27 01:05:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:41,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:41,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:41,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:41,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-27 01:05:41,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:41,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:41,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:41,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:05:41,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:41,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:41,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:41,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:41,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:41,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 01:05:41,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:41,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:41,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:41,479 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 01:05:41,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803932313] [2020-10-27 01:05:41,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:41,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:41,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346101645] [2020-10-27 01:05:41,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:41,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:41,487 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 6 states. [2020-10-27 01:05:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:42,009 INFO L93 Difference]: Finished difference Result 203 states and 263 transitions. [2020-10-27 01:05:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:42,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:05:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:42,014 INFO L225 Difference]: With dead ends: 203 [2020-10-27 01:05:42,015 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:05:42,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:05:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 74. [2020-10-27 01:05:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:05:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-10-27 01:05:42,041 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 16 [2020-10-27 01:05:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:42,041 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-10-27 01:05:42,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-10-27 01:05:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:05:42,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:42,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:42,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:05:42,048 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1017080340, now seen corresponding path program 1 times [2020-10-27 01:05:42,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:42,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773594839] [2020-10-27 01:05:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:05:42,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:42,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 01:05:42,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:42,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:05:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:05:42,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:42,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:42,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:42,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:42,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:42,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:42,194 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 01:05:42,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773594839] [2020-10-27 01:05:42,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:42,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:42,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369420143] [2020-10-27 01:05:42,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:42,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:42,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:42,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:42,197 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 4 states. [2020-10-27 01:05:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:42,405 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-10-27 01:05:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:42,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:05:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:42,408 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:05:42,408 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:05:42,408 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 01:05:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:05:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-27 01:05:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:05:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2020-10-27 01:05:42,424 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 21 [2020-10-27 01:05:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:42,425 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2020-10-27 01:05:42,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2020-10-27 01:05:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:05:42,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:42,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:42,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:05:42,429 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1468552923, now seen corresponding path program 1 times [2020-10-27 01:05:42,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:42,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716420850] [2020-10-27 01:05:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:05:42,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:42,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-27 01:05:42,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:42,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:42,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:05:42,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:42,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:42,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:42,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:42,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:42,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:42,638 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 01:05:42,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716420850] [2020-10-27 01:05:42,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:42,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:42,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584862462] [2020-10-27 01:05:42,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:42,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:42,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:42,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:42,642 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 5 states. [2020-10-27 01:05:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:42,881 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2020-10-27 01:05:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:42,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 01:05:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:42,884 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:05:42,884 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:05:42,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:05:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-27 01:05:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:05:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-10-27 01:05:42,904 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 22 [2020-10-27 01:05:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:42,905 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-10-27 01:05:42,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-10-27 01:05:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:05:42,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:42,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:42,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:05:42,908 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1343578289, now seen corresponding path program 1 times [2020-10-27 01:05:42,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:42,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279721756] [2020-10-27 01:05:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:05:42,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:42,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 01:05:42,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:42,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:05:42,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:42,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:43,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:43,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:43,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:43,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:43,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:43,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,022 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 01:05:43,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279721756] [2020-10-27 01:05:43,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:43,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:43,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017664991] [2020-10-27 01:05:43,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:43,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:43,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:43,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:43,025 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 4 states. [2020-10-27 01:05:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:43,210 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2020-10-27 01:05:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:43,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 01:05:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:43,212 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:05:43,212 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:05:43,214 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 01:05:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:05:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-27 01:05:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:05:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-10-27 01:05:43,228 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 26 [2020-10-27 01:05:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:43,228 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-10-27 01:05:43,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-10-27 01:05:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:43,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:43,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:43,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:05:43,233 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1311961699, now seen corresponding path program 1 times [2020-10-27 01:05:43,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:43,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240492262] [2020-10-27 01:05:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:43,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:43,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-27 01:05:43,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:43,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:43,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:05:43,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:43,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:43,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:43,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:43,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:43,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:43,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:43,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240492262] [2020-10-27 01:05:43,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:43,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:43,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580196488] [2020-10-27 01:05:43,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:43,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:43,953 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 6 states. [2020-10-27 01:05:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:44,427 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2020-10-27 01:05:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:44,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 01:05:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:44,432 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:05:44,432 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:05:44,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:05:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 84. [2020-10-27 01:05:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:05:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-27 01:05:44,446 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 27 [2020-10-27 01:05:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:44,448 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-27 01:05:44,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-27 01:05:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:44,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:44,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:44,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:05:44,451 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2009929245, now seen corresponding path program 1 times [2020-10-27 01:05:44,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:44,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109997515] [2020-10-27 01:05:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:44,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:45,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:45,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-27 01:05:45,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:45,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:45,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:45,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:45,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,323 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 01:05:45,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109997515] [2020-10-27 01:05:45,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:45,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:05:45,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076783323] [2020-10-27 01:05:45,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:05:45,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:45,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:05:45,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:05:45,326 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-10-27 01:05:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:45,907 INFO L93 Difference]: Finished difference Result 221 states and 282 transitions. [2020-10-27 01:05:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:45,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:05:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:45,910 INFO L225 Difference]: With dead ends: 221 [2020-10-27 01:05:45,910 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 01:05:45,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 01:05:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 93. [2020-10-27 01:05:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:05:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-10-27 01:05:45,937 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 27 [2020-10-27 01:05:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:45,937 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-10-27 01:05:45,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:05:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-10-27 01:05:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:45,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:45,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:45,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:05:45,941 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1216707632, now seen corresponding path program 1 times [2020-10-27 01:05:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:45,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072286494] [2020-10-27 01:05:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:46,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:46,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-27 01:05:46,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:46,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:05:46,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:05:46,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:46,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:46,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:46,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:46,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:46,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:46,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,206 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 01:05:46,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072286494] [2020-10-27 01:05:46,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:46,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:46,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43280965] [2020-10-27 01:05:46,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:46,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:46,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:46,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:46,209 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 6 states. [2020-10-27 01:05:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:46,499 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2020-10-27 01:05:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:46,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 01:05:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:46,501 INFO L225 Difference]: With dead ends: 158 [2020-10-27 01:05:46,501 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:05:46,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:05:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-10-27 01:05:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:05:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2020-10-27 01:05:46,512 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 29 [2020-10-27 01:05:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:46,512 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2020-10-27 01:05:46,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2020-10-27 01:05:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:46,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:46,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:46,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:05:46,514 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:46,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1305099344, now seen corresponding path program 1 times [2020-10-27 01:05:46,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:46,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714576313] [2020-10-27 01:05:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:46,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 01:05:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 01:05:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:46,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:46,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:46,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:46,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,720 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 01:05:46,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714576313] [2020-10-27 01:05:46,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:46,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:46,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26017922] [2020-10-27 01:05:46,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:46,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:46,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:46,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:46,723 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand 5 states. [2020-10-27 01:05:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:46,955 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-27 01:05:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:46,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 01:05:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:46,957 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:05:46,957 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:05:46,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:46,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:05:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-10-27 01:05:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:05:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-10-27 01:05:46,970 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2020-10-27 01:05:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:46,971 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-10-27 01:05:46,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-10-27 01:05:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:05:46,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:46,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:46,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:05:46,975 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:46,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:46,975 INFO L82 PathProgramCache]: Analyzing trace with hash 764317007, now seen corresponding path program 1 times [2020-10-27 01:05:46,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:46,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303461504] [2020-10-27 01:05:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:47,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:48,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:05:48,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:48,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-10-27 01:05:48,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:48,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:48,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:48,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:05:48,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:48,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:48,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:48,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:48,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:48,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:48,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:48,527 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 01:05:48,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303461504] [2020-10-27 01:05:48,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:48,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:48,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081581911] [2020-10-27 01:05:48,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:48,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:48,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:48,531 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 8 states. [2020-10-27 01:05:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:49,247 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2020-10-27 01:05:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:49,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 01:05:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:49,249 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:05:49,249 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 01:05:49,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 01:05:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 97. [2020-10-27 01:05:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:05:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2020-10-27 01:05:49,263 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 30 [2020-10-27 01:05:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:49,263 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2020-10-27 01:05:49,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2020-10-27 01:05:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:05:49,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:49,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:49,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:05:49,266 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:49,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash 584797111, now seen corresponding path program 1 times [2020-10-27 01:05:49,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:49,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838196699] [2020-10-27 01:05:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:49,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:49,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:05:49,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-27 01:05:49,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:49,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:49,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:49,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:49,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:05:49,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:49,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838196699] [2020-10-27 01:05:49,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:49,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:49,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164244333] [2020-10-27 01:05:49,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:49,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:49,742 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 5 states. [2020-10-27 01:05:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:50,057 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2020-10-27 01:05:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:50,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-27 01:05:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:50,059 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:05:50,059 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 01:05:50,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 01:05:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-10-27 01:05:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:05:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2020-10-27 01:05:50,071 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 32 [2020-10-27 01:05:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:50,071 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2020-10-27 01:05:50,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2020-10-27 01:05:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:05:50,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:50,072 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:50,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:05:50,073 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash -539225007, now seen corresponding path program 1 times [2020-10-27 01:05:50,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:50,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658139664] [2020-10-27 01:05:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:50,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:50,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:05:50,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:50,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 01:05:50,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:50,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:50,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:50,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:05:50,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:50,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:50,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:50,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:50,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:50,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:50,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:50,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:50,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658139664] [2020-10-27 01:05:50,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:50,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:05:50,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868305281] [2020-10-27 01:05:50,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:50,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:50,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:50,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:50,369 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand 6 states. [2020-10-27 01:05:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:50,758 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2020-10-27 01:05:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:50,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-27 01:05:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:50,760 INFO L225 Difference]: With dead ends: 199 [2020-10-27 01:05:50,760 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:05:50,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:05:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2020-10-27 01:05:50,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:05:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2020-10-27 01:05:50,775 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 32 [2020-10-27 01:05:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:50,775 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2020-10-27 01:05:50,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2020-10-27 01:05:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:05:50,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:50,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:50,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:05:50,776 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1722800143, now seen corresponding path program 1 times [2020-10-27 01:05:50,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:50,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358827554] [2020-10-27 01:05:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:51,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:05:51,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:51,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-27 01:05:51,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:51,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:51,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:51,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:51,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:51,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:51,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:51,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:51,771 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 01:05:51,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358827554] [2020-10-27 01:05:51,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:51,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:51,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442020959] [2020-10-27 01:05:51,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:51,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:51,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:51,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:51,773 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand 8 states. [2020-10-27 01:05:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:52,511 INFO L93 Difference]: Finished difference Result 163 states and 197 transitions. [2020-10-27 01:05:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:52,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 01:05:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:52,513 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:05:52,513 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:05:52,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:05:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-27 01:05:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:05:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2020-10-27 01:05:52,536 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 33 [2020-10-27 01:05:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:52,537 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2020-10-27 01:05:52,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2020-10-27 01:05:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:05:52,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:52,539 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:52,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:05:52,539 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:52,540 INFO L82 PathProgramCache]: Analyzing trace with hash -692121367, now seen corresponding path program 1 times [2020-10-27 01:05:52,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:52,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189569513] [2020-10-27 01:05:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:52,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:53,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:05:53,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:53,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-27 01:05:53,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:53,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:53,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:53,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:53,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:53,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:53,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:53,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:53,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:53,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:53,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:53,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:53,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:53,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:53,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:53,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189569513] [2020-10-27 01:05:53,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:53,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:05:53,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488831810] [2020-10-27 01:05:53,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:53,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:53,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:53,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:53,171 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand 5 states. [2020-10-27 01:05:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:53,482 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2020-10-27 01:05:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:53,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-27 01:05:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:53,483 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:05:53,483 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:05:53,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:05:53,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-10-27 01:05:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:05:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2020-10-27 01:05:53,496 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 35 [2020-10-27 01:05:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:53,496 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2020-10-27 01:05:53,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2020-10-27 01:05:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:05:53,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:53,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:53,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:05:53,497 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1026630451, now seen corresponding path program 1 times [2020-10-27 01:05:53,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:53,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78637413] [2020-10-27 01:05:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:53,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:53,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:05:53,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 01:05:53,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 01:05:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:05:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:53,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:53,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:53,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:53,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:53,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:53,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:53,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78637413] [2020-10-27 01:05:53,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:53,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:53,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856294218] [2020-10-27 01:05:53,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:53,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:53,643 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand 4 states. [2020-10-27 01:05:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:53,885 INFO L93 Difference]: Finished difference Result 251 states and 320 transitions. [2020-10-27 01:05:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:53,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-27 01:05:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:53,887 INFO L225 Difference]: With dead ends: 251 [2020-10-27 01:05:53,887 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:05:53,889 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 01:05:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:05:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 152. [2020-10-27 01:05:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 01:05:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2020-10-27 01:05:53,913 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 38 [2020-10-27 01:05:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:53,913 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2020-10-27 01:05:53,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2020-10-27 01:05:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:05:53,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:53,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:53,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:05:53,915 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash 5562097, now seen corresponding path program 1 times [2020-10-27 01:05:53,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:53,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594377167] [2020-10-27 01:05:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:53,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:53,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:05:53,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:53,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:54,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:54,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:54,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:54,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:54,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:54,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:54,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:54,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:54,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:54,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:54,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594377167] [2020-10-27 01:05:54,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:54,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080592188] [2020-10-27 01:05:54,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:54,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:54,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:54,059 INFO L87 Difference]: Start difference. First operand 152 states and 187 transitions. Second operand 4 states. [2020-10-27 01:05:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:54,264 INFO L93 Difference]: Finished difference Result 262 states and 332 transitions. [2020-10-27 01:05:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:54,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-27 01:05:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:54,266 INFO L225 Difference]: With dead ends: 262 [2020-10-27 01:05:54,266 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 01:05:54,267 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 01:05:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 01:05:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 146. [2020-10-27 01:05:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:05:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2020-10-27 01:05:54,283 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 38 [2020-10-27 01:05:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:54,283 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2020-10-27 01:05:54,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2020-10-27 01:05:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:05:54,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:54,284 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:54,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:05:54,284 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:54,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1815445846, now seen corresponding path program 1 times [2020-10-27 01:05:54,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:54,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752661386] [2020-10-27 01:05:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:54,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:56,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:05:56,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:56,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2222 [2020-10-27 01:05:56,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:56,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:56,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:56,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:05:56,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:56,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:56,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:56,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:56,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:56,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:56,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:56,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:56,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:56,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:56,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:56,931 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 01:05:56,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752661386] [2020-10-27 01:05:56,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:56,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:56,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968002904] [2020-10-27 01:05:56,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:56,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:56,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:56,934 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand 10 states. [2020-10-27 01:05:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:57,925 INFO L93 Difference]: Finished difference Result 292 states and 368 transitions. [2020-10-27 01:05:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:57,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 01:05:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:57,927 INFO L225 Difference]: With dead ends: 292 [2020-10-27 01:05:57,927 INFO L226 Difference]: Without dead ends: 239 [2020-10-27 01:05:57,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:05:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-27 01:05:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2020-10-27 01:05:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:05:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2020-10-27 01:05:57,944 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 39 [2020-10-27 01:05:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:57,945 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2020-10-27 01:05:57,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2020-10-27 01:05:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:05:57,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:57,946 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:57,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:05:57,946 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash -25603109, now seen corresponding path program 1 times [2020-10-27 01:05:57,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:57,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720488555] [2020-10-27 01:05:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:57,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:58,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:05:58,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:58,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 01:05:58,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:58,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:58,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 01:05:58,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:58,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:58,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:58,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:58,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:58,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:58,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:05:58,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:58,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:58,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:58,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:58,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:58,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720488555] [2020-10-27 01:05:58,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:58,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:58,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909237057] [2020-10-27 01:05:58,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:58,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:58,067 INFO L87 Difference]: Start difference. First operand 165 states and 202 transitions. Second operand 4 states. [2020-10-27 01:05:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:58,250 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2020-10-27 01:05:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:58,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-27 01:05:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:58,252 INFO L225 Difference]: With dead ends: 168 [2020-10-27 01:05:58,252 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 01:05:58,253 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 01:05:58,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 01:05:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-10-27 01:05:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:05:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2020-10-27 01:05:58,270 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 39 [2020-10-27 01:05:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:58,270 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2020-10-27 01:05:58,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2020-10-27 01:05:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:05:58,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:58,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:58,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:05:58,273 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash 863211217, now seen corresponding path program 1 times [2020-10-27 01:05:58,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:58,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227289025] [2020-10-27 01:05:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:05:58,290 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:05:58,290 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:05:58,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:05:58,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:05:58 BoogieIcfgContainer [2020-10-27 01:05:58,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:05:58,325 INFO L168 Benchmark]: Toolchain (without parser) took 21516.10 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 125.9 MB in the beginning and 201.0 MB in the end (delta: -75.2 MB). Peak memory consumption was 154.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:05:58,326 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 125.8 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:05:58,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 629.90 ms. Allocated memory is still 152.0 MB. Free memory was 125.1 MB in the beginning and 102.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:05:58,331 INFO L168 Benchmark]: Boogie Preprocessor took 74.17 ms. Allocated memory is still 152.0 MB. Free memory was 102.6 MB in the beginning and 99.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:05:58,332 INFO L168 Benchmark]: RCFGBuilder took 779.04 ms. Allocated memory is still 152.0 MB. Free memory was 99.3 MB in the beginning and 94.2 MB in the end (delta: 5.1 MB). Peak memory consumption was 21.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:05:58,332 INFO L168 Benchmark]: TraceAbstraction took 20013.32 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 93.7 MB in the beginning and 201.0 MB in the end (delta: -107.3 MB). Peak memory consumption was 121.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:05:58,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 125.8 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 629.90 ms. Allocated memory is still 152.0 MB. Free memory was 125.1 MB in the beginning and 102.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.17 ms. Allocated memory is still 152.0 MB. Free memory was 102.6 MB in the beginning and 99.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 779.04 ms. Allocated memory is still 152.0 MB. Free memory was 99.3 MB in the beginning and 94.2 MB in the end (delta: 5.1 MB). Peak memory consumption was 21.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20013.32 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 93.7 MB in the beginning and 201.0 MB in the end (delta: -107.3 MB). Peak memory consumption was 121.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1002] SLL* list = malloc(sizeof(SLL)); [L1003] list->next = ((void*)0) [L1004] COND FALSE !(!(list != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1004] list->inner = malloc(sizeof(SLL)) [L1004] EXPR list->inner [L1004] list->inner->next = ((void*)0) [L1004] EXPR list->inner [L1004] list->inner->inner = ((void*)0) [L1004] EXPR list->inner [L1004] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1004] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1006] SLL* end = list; [L1009] COND FALSE !(__VERIFIER_nondet_int()) [L1019] end = ((void*)0) [L1020] end = list [L1023] COND FALSE !(!(((void*)0) != end)) [L1025] COND TRUE ((void*)0) != end [L1027] int len = 0; [L1028] EXPR end->inner [L1028] SLL* inner = end->inner; [L1029] COND TRUE ((void*)0) != inner [L1031] COND TRUE len == 0 [L1032] len = 1 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND FALSE !(!(((void*)0) == inner->inner)) [L1037] EXPR inner->next [L1037] COND FALSE !(!(((void*)0) == inner->next)) [L1038] EXPR inner->inner [L1038] inner = inner->inner [L1039] COND TRUE len == 1 [L1040] EXPR inner->inner [L1040] inner = inner->inner [L1029] COND TRUE ((void*)0) != inner [L1031] COND FALSE !(len == 0) [L1034] len = 2 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND TRUE !(((void*)0) == inner->inner) [L1036] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "sll-01-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 94 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.9s, OverallIterations: 21, TraceHistogramMax: 2, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1745 SDtfs, 1547 SDslu, 3144 SDs, 0 SdLazy, 3772 SolverSat, 376 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 650 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 597 NumberOfCodeBlocks, 597 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 535 ConstructedInterpolants, 0 QuantifiedInterpolants, 153607 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 9/13 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...