/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:45:55,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:45:55,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:45:56,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:45:56,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:45:56,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:45:56,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:45:56,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:45:56,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:45:56,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:45:56,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:45:56,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:45:56,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:45:56,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:45:56,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:45:56,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:45:56,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:45:56,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:45:56,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:45:56,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:45:56,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:45:56,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:45:56,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:45:56,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:45:56,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:45:56,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:45:56,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:45:56,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:45:56,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:45:56,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:45:56,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:45:56,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:45:56,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:45:56,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:45:56,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:45:56,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:45:56,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:45:56,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:45:56,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:45:56,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:45:56,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:45:56,123 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:45:56,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:45:56,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:45:56,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:45:56,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:45:56,181 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:45:56,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:45:56,182 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:45:56,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:45:56,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:45:56,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:45:56,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:45:56,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:45:56,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:45:56,185 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:45:56,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:45:56,185 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:45:56,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:45:56,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:45:56,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:45:56,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:45:56,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:45:56,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:45:56,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:45:56,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:45:56,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:45:56,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:45:56,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:45:56,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:45:56,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:45:56,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:45:56,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:45:56,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:45:56,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:45:56,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:45:56,673 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:45:56,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-10-27 19:45:56,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bde6a2c3/e53b37ba3b8647d78549ed77596f3609/FLAGc46844a1c [2020-10-27 19:45:57,637 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:45:57,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-10-27 19:45:57,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bde6a2c3/e53b37ba3b8647d78549ed77596f3609/FLAGc46844a1c [2020-10-27 19:45:57,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bde6a2c3/e53b37ba3b8647d78549ed77596f3609 [2020-10-27 19:45:57,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:45:57,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:45:57,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:45:57,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:45:57,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:45:57,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:57" (1/1) ... [2020-10-27 19:45:57,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e70a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:57, skipping insertion in model container [2020-10-27 19:45:57,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:57" (1/1) ... [2020-10-27 19:45:57,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:45:57,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:45:58,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:45:58,289 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:45:58,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:45:58,407 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:45:58,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58 WrapperNode [2020-10-27 19:45:58,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:45:58,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:45:58,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:45:58,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:45:58,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (1/1) ... [2020-10-27 19:45:58,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (1/1) ... [2020-10-27 19:45:58,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (1/1) ... [2020-10-27 19:45:58,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (1/1) ... [2020-10-27 19:45:58,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (1/1) ... [2020-10-27 19:45:58,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (1/1) ... [2020-10-27 19:45:58,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (1/1) ... [2020-10-27 19:45:58,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:45:58,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:45:58,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:45:58,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:45:58,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:45:58,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:45:58,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:45:58,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:45:58,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:45:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:45:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:45:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:45:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:45:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:45:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:45:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:45:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:45:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:45:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:45:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:45:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:45:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:45:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:45:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:45:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:45:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:45:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:45:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:45:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:45:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:45:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:45:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:45:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:45:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:45:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:45:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:45:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:45:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:45:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:45:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:45:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:45:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:45:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:45:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:45:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:45:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:45:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:45:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:45:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:45:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:45:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:45:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:45:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:45:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:45:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:45:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:45:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:45:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:45:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:45:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:45:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:45:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:45:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:45:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:45:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:45:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:45:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:45:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:45:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:45:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:45:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:45:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:45:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:45:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:45:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:45:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:45:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:45:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:45:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:45:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:45:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:45:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:45:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:45:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:45:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:45:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:45:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:45:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:45:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:45:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:45:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:45:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:45:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:45:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:45:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:45:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:45:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:45:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:45:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:45:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:45:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:45:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:45:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:45:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:45:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:45:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:45:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:45:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:45:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:45:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:45:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:45:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:45:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:45:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:45:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:45:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:45:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:45:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:45:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:45:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:45:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:45:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:45:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:45:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:45:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:45:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:45:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:45:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:45:59,370 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:45:59,370 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-27 19:45:59,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:45:59 BoogieIcfgContainer [2020-10-27 19:45:59,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:45:59,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:45:59,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:45:59,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:45:59,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:45:57" (1/3) ... [2020-10-27 19:45:59,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149e02fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:45:59, skipping insertion in model container [2020-10-27 19:45:59,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:58" (2/3) ... [2020-10-27 19:45:59,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149e02fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:45:59, skipping insertion in model container [2020-10-27 19:45:59,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:45:59" (3/3) ... [2020-10-27 19:45:59,389 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-10-27 19:45:59,401 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:45:59,407 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:45:59,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:45:59,462 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:45:59,463 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:45:59,463 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:45:59,463 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:45:59,469 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:45:59,469 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:45:59,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:45:59,470 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:45:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states. [2020-10-27 19:45:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 19:45:59,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:45:59,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:45:59,512 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:45:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:45:59,521 INFO L82 PathProgramCache]: Analyzing trace with hash 987864192, now seen corresponding path program 1 times [2020-10-27 19:45:59,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:45:59,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919038130] [2020-10-27 19:45:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:45:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:45:59,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:45:59,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:45:59,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 19:45:59,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:45:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-27 19:45:59,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:45:59,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:45:59,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:45:59,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:45:59,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:46:00,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:00,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:00,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:00,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:00,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:00,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 19:46:00,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:00,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:00,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:00,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:46:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919038130] [2020-10-27 19:46:00,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:00,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:00,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010433698] [2020-10-27 19:46:00,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:00,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:00,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:00,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:00,132 INFO L87 Difference]: Start difference. First operand 93 states. Second operand 4 states. [2020-10-27 19:46:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:00,484 INFO L93 Difference]: Finished difference Result 179 states and 324 transitions. [2020-10-27 19:46:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:00,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-27 19:46:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:00,496 INFO L225 Difference]: With dead ends: 179 [2020-10-27 19:46:00,496 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 19:46:00,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 19:46:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2020-10-27 19:46:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:46:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-10-27 19:46:00,556 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 10 [2020-10-27 19:46:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:00,556 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-10-27 19:46:00,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-10-27 19:46:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:00,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:00,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:00,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:00,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:00,559 INFO L82 PathProgramCache]: Analyzing trace with hash 496275789, now seen corresponding path program 1 times [2020-10-27 19:46:00,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:00,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881102949] [2020-10-27 19:46:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:00,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:00,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:00,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:00,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:00,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:00,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-27 19:46:00,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 19:46:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:00,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:00,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:00,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:00,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:00,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:00,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:00,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:46:00,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:00,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:00,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:00,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:00,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:00,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881102949] [2020-10-27 19:46:00,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:00,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:00,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635589497] [2020-10-27 19:46:00,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:00,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:00,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:00,956 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 4 states. [2020-10-27 19:46:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:01,225 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-27 19:46:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:01,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 19:46:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:01,232 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:46:01,233 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:46:01,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:46:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 19:46:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:46:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-27 19:46:01,260 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 16 [2020-10-27 19:46:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:01,261 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-27 19:46:01,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-27 19:46:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:01,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:01,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:01,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:01,265 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:01,268 INFO L82 PathProgramCache]: Analyzing trace with hash 498122831, now seen corresponding path program 1 times [2020-10-27 19:46:01,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:01,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835237609] [2020-10-27 19:46:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:01,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:01,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:01,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 19:46:01,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:01,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:01,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:46:01,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:01,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:01,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:01,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:01,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:01,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:01,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:01,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:01,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:01,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:01,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835237609] [2020-10-27 19:46:01,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:01,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:01,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328754052] [2020-10-27 19:46:01,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:01,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:01,588 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 5 states. [2020-10-27 19:46:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:01,835 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-10-27 19:46:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:01,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 19:46:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:01,837 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:46:01,839 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:46:01,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:46:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-27 19:46:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-10-27 19:46:01,859 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 16 [2020-10-27 19:46:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:01,860 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-10-27 19:46:01,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-10-27 19:46:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:46:01,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:01,861 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 19:46:01,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:01,861 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:01,863 INFO L82 PathProgramCache]: Analyzing trace with hash 265378658, now seen corresponding path program 1 times [2020-10-27 19:46:01,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:01,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97351045] [2020-10-27 19:46:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:46:02,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 19:46:02,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:02,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:46:02,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:02,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:02,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:02,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:02,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:02,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:02,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:02,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97351045] [2020-10-27 19:46:02,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:02,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:02,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528569622] [2020-10-27 19:46:02,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:02,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:02,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:02,340 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 4 states. [2020-10-27 19:46:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:02,537 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-10-27 19:46:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:02,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 19:46:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:02,540 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:46:02,540 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 19:46:02,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 19:46:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-10-27 19:46:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 19:46:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-10-27 19:46:02,549 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 21 [2020-10-27 19:46:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:02,550 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-10-27 19:46:02,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-10-27 19:46:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:02,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:02,551 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 19:46:02,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:02,551 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:02,552 INFO L82 PathProgramCache]: Analyzing trace with hash -366856669, now seen corresponding path program 1 times [2020-10-27 19:46:02,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:02,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528614277] [2020-10-27 19:46:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:02,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-27 19:46:02,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:46:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:02,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:02,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:02,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:02,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528614277] [2020-10-27 19:46:02,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:02,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:02,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371949627] [2020-10-27 19:46:02,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:02,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:02,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:02,903 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 5 states. [2020-10-27 19:46:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:03,210 INFO L93 Difference]: Finished difference Result 171 states and 217 transitions. [2020-10-27 19:46:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:03,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 19:46:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:03,213 INFO L225 Difference]: With dead ends: 171 [2020-10-27 19:46:03,213 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 19:46:03,214 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 19:46:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 19:46:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2020-10-27 19:46:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-10-27 19:46:03,224 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 22 [2020-10-27 19:46:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:03,224 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-10-27 19:46:03,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-10-27 19:46:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:03,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:03,225 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 19:46:03,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:03,226 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash 334207909, now seen corresponding path program 1 times [2020-10-27 19:46:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:03,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952105985] [2020-10-27 19:46:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:03,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:03,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 19:46:03,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:46:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:03,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:03,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:03,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:03,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:03,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:03,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:03,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952105985] [2020-10-27 19:46:03,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:03,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970795700] [2020-10-27 19:46:03,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:03,410 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 5 states. [2020-10-27 19:46:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:03,704 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2020-10-27 19:46:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:03,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 19:46:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:03,707 INFO L225 Difference]: With dead ends: 90 [2020-10-27 19:46:03,707 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 19:46:03,709 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 19:46:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 19:46:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 19:46:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 19:46:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-10-27 19:46:03,717 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 22 [2020-10-27 19:46:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:03,718 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-10-27 19:46:03,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-10-27 19:46:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:03,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:03,719 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 19:46:03,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:03,720 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1622058487, now seen corresponding path program 1 times [2020-10-27 19:46:03,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:03,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974157205] [2020-10-27 19:46:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:03,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 19:46:03,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:03,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 19:46:03,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:03,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:03,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:03,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:03,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:03,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:03,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974157205] [2020-10-27 19:46:03,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:03,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:03,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834432763] [2020-10-27 19:46:03,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:03,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:03,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:03,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:03,851 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 4 states. [2020-10-27 19:46:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:04,067 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2020-10-27 19:46:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:04,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 19:46:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:04,070 INFO L225 Difference]: With dead ends: 126 [2020-10-27 19:46:04,070 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:46:04,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:46:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-10-27 19:46:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:46:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-27 19:46:04,081 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 26 [2020-10-27 19:46:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:04,081 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-27 19:46:04,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-27 19:46:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:04,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:04,083 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 19:46:04,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:04,083 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1263296047, now seen corresponding path program 1 times [2020-10-27 19:46:04,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:04,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163364943] [2020-10-27 19:46:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:04,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:04,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-27 19:46:04,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 19:46:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:04,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:04,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:04,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:04,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:04,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:04,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:04,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163364943] [2020-10-27 19:46:04,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:04,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:04,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429398510] [2020-10-27 19:46:04,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:04,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:04,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:04,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:04,810 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 4 states. [2020-10-27 19:46:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:04,982 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-10-27 19:46:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:04,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 19:46:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:04,984 INFO L225 Difference]: With dead ends: 76 [2020-10-27 19:46:04,984 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 19:46:04,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 19:46:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 19:46:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:46:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-10-27 19:46:05,005 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 27 [2020-10-27 19:46:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:05,006 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-10-27 19:46:05,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-10-27 19:46:05,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:05,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:05,008 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 19:46:05,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:05,009 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:05,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1688120956, now seen corresponding path program 1 times [2020-10-27 19:46:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:05,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646282860] [2020-10-27 19:46:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:05,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:05,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-27 19:46:05,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:05,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 19:46:05,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:05,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:05,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:05,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:05,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:05,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:05,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:05,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:05,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646282860] [2020-10-27 19:46:05,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:05,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408341457] [2020-10-27 19:46:05,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:05,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:05,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:05,450 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 4 states. [2020-10-27 19:46:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:05,631 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-10-27 19:46:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:05,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 19:46:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:05,633 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:46:05,633 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:46:05,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:46:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 19:46:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:46:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-10-27 19:46:05,642 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 29 [2020-10-27 19:46:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:05,642 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-10-27 19:46:05,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-10-27 19:46:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:05,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:05,644 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 19:46:05,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:05,644 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1686273914, now seen corresponding path program 1 times [2020-10-27 19:46:05,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:05,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456990395] [2020-10-27 19:46:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:06,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:06,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 19:46:06,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 19:46:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:06,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:06,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:06,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:06,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:06,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:06,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:06,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:06,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456990395] [2020-10-27 19:46:06,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:06,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:06,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670323969] [2020-10-27 19:46:06,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:06,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:06,176 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 5 states. [2020-10-27 19:46:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:06,374 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-10-27 19:46:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:06,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 19:46:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:06,375 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:46:06,375 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:46:06,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:46:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-27 19:46:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2020-10-27 19:46:06,391 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 29 [2020-10-27 19:46:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:06,391 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2020-10-27 19:46:06,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2020-10-27 19:46:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:06,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:06,394 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 19:46:06,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:06,395 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1218900559, now seen corresponding path program 1 times [2020-10-27 19:46:06,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:06,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8242310] [2020-10-27 19:46:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:06,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:46:06,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-27 19:46:06,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:06,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 19:46:06,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:06,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:06,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:06,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:06,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8242310] [2020-10-27 19:46:06,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:06,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:46:06,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738278890] [2020-10-27 19:46:06,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:06,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:06,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:06,950 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 7 states. [2020-10-27 19:46:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:07,441 INFO L93 Difference]: Finished difference Result 165 states and 202 transitions. [2020-10-27 19:46:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:07,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-27 19:46:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:07,447 INFO L225 Difference]: With dead ends: 165 [2020-10-27 19:46:07,447 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 19:46:07,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 19:46:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 81. [2020-10-27 19:46:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:46:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-10-27 19:46:07,466 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 30 [2020-10-27 19:46:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:07,467 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-10-27 19:46:07,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-10-27 19:46:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:07,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:07,468 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 19:46:07,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:07,469 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:07,469 INFO L82 PathProgramCache]: Analyzing trace with hash -964421169, now seen corresponding path program 1 times [2020-10-27 19:46:07,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:07,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322392382] [2020-10-27 19:46:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:07,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:08,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:08,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:46:08,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-27 19:46:08,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:08,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:08,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:08,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:46:08,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:08,507 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-10-27 19:46:08,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:08,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:08,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:08,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:46:08,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:08,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:46:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:08,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322392382] [2020-10-27 19:46:08,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:08,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:08,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629615575] [2020-10-27 19:46:08,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:08,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:08,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:08,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:08,626 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 8 states. [2020-10-27 19:46:09,145 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 19:46:09,486 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-27 19:46:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:09,717 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2020-10-27 19:46:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:09,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 19:46:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:09,720 INFO L225 Difference]: With dead ends: 145 [2020-10-27 19:46:09,720 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 19:46:09,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 19:46:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 100. [2020-10-27 19:46:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 19:46:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2020-10-27 19:46:09,731 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 30 [2020-10-27 19:46:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:09,732 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2020-10-27 19:46:09,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2020-10-27 19:46:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:09,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:09,733 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 19:46:09,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:09,734 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:09,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:09,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2008414403, now seen corresponding path program 1 times [2020-10-27 19:46:09,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:09,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731162077] [2020-10-27 19:46:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:46:09,753 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:46:09,753 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:46:09,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:09,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:46:09 BoogieIcfgContainer [2020-10-27 19:46:09,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:46:09,779 INFO L168 Benchmark]: Toolchain (without parser) took 11913.65 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 124.8 MB in the beginning and 151.3 MB in the end (delta: -26.5 MB). Peak memory consumption was 85.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:09,779 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:46:09,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 536.74 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 101.5 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:09,781 INFO L168 Benchmark]: Boogie Preprocessor took 96.03 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 132.5 MB in the end (delta: -31.0 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:09,781 INFO L168 Benchmark]: RCFGBuilder took 867.09 ms. Allocated memory is still 151.0 MB. Free memory was 132.5 MB in the beginning and 77.5 MB in the end (delta: 55.0 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:09,782 INFO L168 Benchmark]: TraceAbstraction took 10399.46 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 76.9 MB in the beginning and 151.3 MB in the end (delta: -74.4 MB). Peak memory consumption was 36.2 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:09,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 536.74 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 101.5 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 96.03 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 132.5 MB in the end (delta: -31.0 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 867.09 ms. Allocated memory is still 151.0 MB. Free memory was 132.5 MB in the beginning and 77.5 MB in the end (delta: 55.0 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10399.46 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 76.9 MB in the beginning and 151.3 MB in the end (delta: -74.4 MB). Peak memory consumption was 36.2 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: [L1003] SLL* list = malloc(sizeof(SLL)); [L1004] list->next = ((void*)0) [L1005] list->prev = ((void*)0) [L1006] COND FALSE !(!(list != ((void*)0))) [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1006] list->inner = malloc(sizeof(SLL)) [L1006] EXPR list->inner [L1006] list->inner->next = ((void*)0) [L1006] EXPR list->inner [L1006] list->inner->inner = ((void*)0) [L1006] EXPR list->inner [L1006] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1006] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1008] SLL* end = list; [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1022] end = ((void*)0) [L1023] end = list [L1026] COND FALSE !(!(((void*)0) != end)) [L1028] COND TRUE ((void*)0) != end [L1030] int len = 0; [L1031] EXPR end->inner [L1031] SLL* inner = end->inner; [L1032] COND TRUE ((void*)0) != inner [L1034] COND TRUE len == 0 [L1035] len = 1 [L1038] COND FALSE !(!(((void*)0) != inner)) [L1039] EXPR inner->inner [L1039] COND FALSE !(!(((void*)0) == inner->inner)) [L1040] EXPR inner->next [L1040] COND TRUE !(((void*)0) != inner->next) [L1040] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "dll-01-1.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.2s, OverallIterations: 13, TraceHistogramMax: 1, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 906 SDtfs, 567 SDslu, 1031 SDs, 0 SdLazy, 1434 SolverSat, 184 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 170 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 311 NumberOfCodeBlocks, 311 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 48397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 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...