/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:46:16,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:46:16,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:46:17,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:46:17,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:46:17,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:46:17,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:46:17,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:46:17,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:46:17,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:46:17,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:46:17,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:46:17,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:46:17,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:46:17,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:46:17,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:46:17,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:46:17,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:46:17,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:46:17,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:46:17,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:46:17,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:46:17,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:46:17,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:46:17,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:46:17,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:46:17,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:46:17,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:46:17,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:46:17,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:46:17,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:46:17,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:46:17,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:46:17,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:46:17,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:46:17,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:46:17,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:46:17,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:46:17,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:46:17,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:46:17,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:46:17,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:46:17,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:46:17,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:46:17,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:46:17,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:46:17,175 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:46:17,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:46:17,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:46:17,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:46:17,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:46:17,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:46:17,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:46:17,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:46:17,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:46:17,178 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:46:17,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:46:17,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:46:17,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:46:17,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:46:17,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:46:17,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:46:17,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:46:17,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:17,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:46:17,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:46:17,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:46:17,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:46:17,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:46:17,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:46:17,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:46:17,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:46:17,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:46:17,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:46:17,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:46:17,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:46:17,629 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:46:17,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-27 19:46:17,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8229d61e/394c51221ca844888a3125894e2967da/FLAG250e3baf0 [2020-10-27 19:46:18,473 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:46:18,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-27 19:46:18,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8229d61e/394c51221ca844888a3125894e2967da/FLAG250e3baf0 [2020-10-27 19:46:18,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8229d61e/394c51221ca844888a3125894e2967da [2020-10-27 19:46:18,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:46:18,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:46:18,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:18,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:46:18,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:46:18,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:18" (1/1) ... [2020-10-27 19:46:18,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e4adb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:18, skipping insertion in model container [2020-10-27 19:46:18,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:18" (1/1) ... [2020-10-27 19:46:18,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:46:18,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:46:19,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:19,321 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:46:19,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:19,487 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:46:19,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19 WrapperNode [2020-10-27 19:46:19,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:19,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:46:19,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:46:19,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:46:19,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (1/1) ... [2020-10-27 19:46:19,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (1/1) ... [2020-10-27 19:46:19,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (1/1) ... [2020-10-27 19:46:19,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (1/1) ... [2020-10-27 19:46:19,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (1/1) ... [2020-10-27 19:46:19,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (1/1) ... [2020-10-27 19:46:19,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (1/1) ... [2020-10-27 19:46:19,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:19,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:19,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:19,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:19,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:19,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:19,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:19,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:19,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:19,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:19,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:19,744 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:19,747 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:19,747 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:19,747 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:19,747 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:19,747 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:19,747 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:19,747 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:19,750 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:19,750 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:19,750 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:19,752 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:19,752 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:19,752 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:19,752 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:19,753 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:19,753 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:19,753 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:19,753 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:19,754 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:19,755 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:19,755 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:20,586 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:20,586 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-27 19:46:20,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:20 BoogieIcfgContainer [2020-10-27 19:46:20,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:20,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:20,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:20,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:20,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:46:18" (1/3) ... [2020-10-27 19:46:20,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9d25a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:20, skipping insertion in model container [2020-10-27 19:46:20,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:19" (2/3) ... [2020-10-27 19:46:20,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9d25a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:20, skipping insertion in model container [2020-10-27 19:46:20,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:20" (3/3) ... [2020-10-27 19:46:20,599 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-10-27 19:46:20,614 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:20,620 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:20,640 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:20,673 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:20,673 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:20,674 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:20,674 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:20,674 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:20,674 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:20,674 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:20,674 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-10-27 19:46:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 19:46:20,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:20,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:20,703 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1010618624, now seen corresponding path program 1 times [2020-10-27 19:46:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:20,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020761202] [2020-10-27 19:46:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:21,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 19:46:21,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:21,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 19:46:21,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:21,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:21,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 19:46:21,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:21,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:21,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:21,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:21,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 19:46:21,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:21,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:21,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:21,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:21,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:21,245 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 19:46:21,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020761202] [2020-10-27 19:46:21,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:21,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:21,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404658549] [2020-10-27 19:46:21,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:21,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:21,300 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2020-10-27 19:46:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:21,622 INFO L93 Difference]: Finished difference Result 181 states and 328 transitions. [2020-10-27 19:46:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:21,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-27 19:46:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:21,635 INFO L225 Difference]: With dead ends: 181 [2020-10-27 19:46:21,635 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 19:46:21,641 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 19:46:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 19:46:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-10-27 19:46:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:46:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-27 19:46:21,694 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 10 [2020-10-27 19:46:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:21,694 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-27 19:46:21,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:21,694 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-27 19:46:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:21,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:21,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:21,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:21,696 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash 742122061, now seen corresponding path program 1 times [2020-10-27 19:46:21,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:21,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302614330] [2020-10-27 19:46:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:21,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:22,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:22,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:22,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 19:46:22,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 19:46:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:22,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:22,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:22,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:22,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:22,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:22,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:46:22,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:22,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:22,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:22,129 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 19:46:22,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302614330] [2020-10-27 19:46:22,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:22,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:22,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906925616] [2020-10-27 19:46:22,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:22,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:22,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:22,136 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 4 states. [2020-10-27 19:46:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:22,366 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-10-27 19:46:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:22,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 19:46:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:22,368 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:46:22,368 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 19:46:22,369 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 19:46:22,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 19:46:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-27 19:46:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 19:46:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2020-10-27 19:46:22,384 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 16 [2020-10-27 19:46:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:22,385 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2020-10-27 19:46:22,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2020-10-27 19:46:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:22,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:22,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:22,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:22,386 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:22,387 INFO L82 PathProgramCache]: Analyzing trace with hash 743969103, now seen corresponding path program 1 times [2020-10-27 19:46:22,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:22,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899772365] [2020-10-27 19:46:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:22,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:22,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:22,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:22,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-27 19:46:22,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:22,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:22,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:46:22,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:22,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:22,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:22,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:22,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:22,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:22,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:22,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:22,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:22,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:22,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:22,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:22,611 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 19:46:22,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899772365] [2020-10-27 19:46:22,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:22,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:22,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556651344] [2020-10-27 19:46:22,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:22,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:22,615 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand 5 states. [2020-10-27 19:46:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:22,866 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-10-27 19:46:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:22,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 19:46:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:22,868 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:46:22,868 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 19:46:22,869 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 19:46:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 19:46:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-27 19:46:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:46:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-10-27 19:46:22,879 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 16 [2020-10-27 19:46:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:22,879 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-10-27 19:46:22,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-10-27 19:46:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:46:22,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:22,880 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 19:46:22,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:22,881 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash -624053330, now seen corresponding path program 1 times [2020-10-27 19:46:22,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:22,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498765113] [2020-10-27 19:46:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:22,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:23,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:46:23,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:23,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-27 19:46:23,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:46:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:23,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:23,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:23,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:23,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:23,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:23,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:23,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:23,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:23,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:23,403 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 19:46:23,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498765113] [2020-10-27 19:46:23,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:23,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:23,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407115315] [2020-10-27 19:46:23,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:23,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:23,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:23,406 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 4 states. [2020-10-27 19:46:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:23,653 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-10-27 19:46:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:23,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 19:46:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:23,655 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:46:23,655 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:46:23,656 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 19:46:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:46:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-10-27 19:46:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 19:46:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2020-10-27 19:46:23,664 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 21 [2020-10-27 19:46:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:23,664 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2020-10-27 19:46:23,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2020-10-27 19:46:23,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:23,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:23,665 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 19:46:23,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:23,666 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:23,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2125349795, now seen corresponding path program 1 times [2020-10-27 19:46:23,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:23,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804341705] [2020-10-27 19:46:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:23,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:24,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:24,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-27 19:46:24,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:24,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:24,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:46:24,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:24,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:24,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:24,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,129 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 19:46:24,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804341705] [2020-10-27 19:46:24,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:24,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:24,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631608510] [2020-10-27 19:46:24,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:24,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:24,132 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 5 states. [2020-10-27 19:46:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:24,458 INFO L93 Difference]: Finished difference Result 174 states and 223 transitions. [2020-10-27 19:46:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:24,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 19:46:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:24,486 INFO L225 Difference]: With dead ends: 174 [2020-10-27 19:46:24,486 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 19:46:24,488 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 19:46:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 19:46:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-27 19:46:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:46:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2020-10-27 19:46:24,499 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 22 [2020-10-27 19:46:24,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:24,499 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2020-10-27 19:46:24,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2020-10-27 19:46:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:24,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:24,501 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 19:46:24,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:24,505 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1468552923, now seen corresponding path program 1 times [2020-10-27 19:46:24,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:24,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579426635] [2020-10-27 19:46:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:24,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:24,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-27 19:46:24,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:46:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:24,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:24,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:24,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:24,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:24,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,780 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 19:46:24,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579426635] [2020-10-27 19:46:24,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:24,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:24,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285122782] [2020-10-27 19:46:24,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:24,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:24,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:24,784 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 5 states. [2020-10-27 19:46:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:25,076 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2020-10-27 19:46:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:25,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 19:46:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:25,079 INFO L225 Difference]: With dead ends: 91 [2020-10-27 19:46:25,082 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 19:46:25,083 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 19:46:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 19:46:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-27 19:46:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-27 19:46:25,104 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 22 [2020-10-27 19:46:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:25,105 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-27 19:46:25,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-27 19:46:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:25,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:25,106 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 19:46:25,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:25,107 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1343578289, now seen corresponding path program 1 times [2020-10-27 19:46:25,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:25,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925565326] [2020-10-27 19:46:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:25,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:25,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:25,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:25,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 19:46:25,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 19:46:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:25,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:25,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:25,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:25,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:25,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:25,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:25,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:25,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:25,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:25,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:25,231 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 19:46:25,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925565326] [2020-10-27 19:46:25,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:25,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:25,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904088217] [2020-10-27 19:46:25,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:25,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:25,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:25,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:25,234 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 4 states. [2020-10-27 19:46:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:25,443 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2020-10-27 19:46:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:25,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 19:46:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:25,445 INFO L225 Difference]: With dead ends: 95 [2020-10-27 19:46:25,445 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 19:46:25,448 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 19:46:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 19:46:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-27 19:46:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:46:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-10-27 19:46:25,466 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 26 [2020-10-27 19:46:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:25,467 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-10-27 19:46:25,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-10-27 19:46:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:25,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:25,471 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 19:46:25,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:25,472 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1311961699, now seen corresponding path program 1 times [2020-10-27 19:46:25,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:25,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8395817] [2020-10-27 19:46:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:25,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:26,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:26,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-27 19:46:26,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 19:46:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:26,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:26,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:26,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:26,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:26,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:26,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,199 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 19:46:26,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8395817] [2020-10-27 19:46:26,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:26,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:26,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077800771] [2020-10-27 19:46:26,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:26,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:26,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:26,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:26,201 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 4 states. [2020-10-27 19:46:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:26,417 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2020-10-27 19:46:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:26,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 19:46:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:26,419 INFO L225 Difference]: With dead ends: 76 [2020-10-27 19:46:26,419 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 19:46:26,419 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 19:46:26,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 19:46:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 19:46:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:46:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-10-27 19:46:26,428 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 27 [2020-10-27 19:46:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:26,429 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-10-27 19:46:26,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-10-27 19:46:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:26,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:26,430 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 19:46:26,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:26,431 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1216707632, now seen corresponding path program 1 times [2020-10-27 19:46:26,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:26,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555988517] [2020-10-27 19:46:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:26,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:26,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 19:46:26,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 19:46:26,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:26,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:26,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:26,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:26,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:26,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:26,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:26,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,785 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 19:46:26,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555988517] [2020-10-27 19:46:26,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:26,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:26,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7060120] [2020-10-27 19:46:26,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:26,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:26,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:26,795 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 4 states. [2020-10-27 19:46:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:26,991 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-10-27 19:46:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:26,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 19:46:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:26,993 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:46:26,993 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:46:26,994 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 19:46:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:46:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 19:46:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:46:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-27 19:46:27,018 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 29 [2020-10-27 19:46:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:27,018 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-27 19:46:27,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-27 19:46:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:27,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:27,020 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 19:46:27,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:27,021 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1214860590, now seen corresponding path program 1 times [2020-10-27 19:46:27,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:27,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888452900] [2020-10-27 19:46:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:27,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:27,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-27 19:46:27,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 19:46:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:27,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:27,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:27,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:27,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:27,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,492 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 19:46:27,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888452900] [2020-10-27 19:46:27,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:27,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:27,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763813055] [2020-10-27 19:46:27,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:27,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:27,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:27,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:27,495 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 5 states. [2020-10-27 19:46:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:27,705 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-10-27 19:46:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:27,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 19:46:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:27,707 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:46:27,707 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:46:27,708 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 19:46:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:46:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-27 19:46:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-27 19:46:27,715 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 29 [2020-10-27 19:46:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:27,715 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-27 19:46:27,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-27 19:46:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:27,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:27,716 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 19:46:27,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:27,717 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1347328561, now seen corresponding path program 1 times [2020-10-27 19:46:27,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:27,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407568837] [2020-10-27 19:46:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:28,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:46:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-27 19:46:28,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 19:46:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:28,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:46:28,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:28,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:28,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:28,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:28,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:28,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,290 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 19:46:28,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407568837] [2020-10-27 19:46:28,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:28,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:46:28,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442245699] [2020-10-27 19:46:28,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:28,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:28,293 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 7 states. [2020-10-27 19:46:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:28,733 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2020-10-27 19:46:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:28,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-27 19:46:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:28,734 INFO L225 Difference]: With dead ends: 165 [2020-10-27 19:46:28,735 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 19:46:28,735 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 19:46:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 19:46:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 81. [2020-10-27 19:46:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:46:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-10-27 19:46:28,743 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 30 [2020-10-27 19:46:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:28,744 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-10-27 19:46:28,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-10-27 19:46:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:28,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:28,745 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 19:46:28,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:28,746 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 764317007, now seen corresponding path program 1 times [2020-10-27 19:46:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:28,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178595436] [2020-10-27 19:46:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:30,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:46:30,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-27 19:46:30,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:46:30,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:30,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:30,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:30,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:30,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:30,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:30,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:30,475 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 19:46:30,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178595436] [2020-10-27 19:46:30,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:30,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:30,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914299679] [2020-10-27 19:46:30,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:30,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:30,480 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 8 states. [2020-10-27 19:46:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:31,405 INFO L93 Difference]: Finished difference Result 159 states and 198 transitions. [2020-10-27 19:46:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:31,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 19:46:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:31,407 INFO L225 Difference]: With dead ends: 159 [2020-10-27 19:46:31,408 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 19:46:31,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 19:46:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 100. [2020-10-27 19:46:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 19:46:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2020-10-27 19:46:31,421 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 30 [2020-10-27 19:46:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:31,421 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2020-10-27 19:46:31,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2020-10-27 19:46:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:31,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:31,423 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 19:46:31,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:31,424 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1722800143, now seen corresponding path program 1 times [2020-10-27 19:46:31,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:31,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720947375] [2020-10-27 19:46:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:31,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:32,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:46:32,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-10-27 19:46:32,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:46:32,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:32,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:32,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:32,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,444 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 19:46:32,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720947375] [2020-10-27 19:46:32,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:32,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 19:46:32,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739135515] [2020-10-27 19:46:32,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:32,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:32,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:32,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:32,447 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 9 states. [2020-10-27 19:46:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:33,456 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2020-10-27 19:46:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:33,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 19:46:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:33,461 INFO L225 Difference]: With dead ends: 234 [2020-10-27 19:46:33,461 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 19:46:33,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 19:46:33,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 108. [2020-10-27 19:46:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 19:46:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-10-27 19:46:33,482 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 33 [2020-10-27 19:46:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:33,482 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-10-27 19:46:33,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-10-27 19:46:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:33,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:33,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:33,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:33,484 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1279442395, now seen corresponding path program 1 times [2020-10-27 19:46:33,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:33,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868741047] [2020-10-27 19:46:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:34,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:34,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:46:34,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-27 19:46:34,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 19:46:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:34,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:34,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:34,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:34,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:34,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:34,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:34,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:34,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868741047] [2020-10-27 19:46:34,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:34,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:46:34,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216076584] [2020-10-27 19:46:34,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:34,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:34,359 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 7 states. [2020-10-27 19:46:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:34,962 INFO L93 Difference]: Finished difference Result 234 states and 291 transitions. [2020-10-27 19:46:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:34,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-27 19:46:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:34,966 INFO L225 Difference]: With dead ends: 234 [2020-10-27 19:46:34,966 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 19:46:34,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 19:46:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-10-27 19:46:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 19:46:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 179 transitions. [2020-10-27 19:46:34,987 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 179 transitions. Word has length 35 [2020-10-27 19:46:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:34,987 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 179 transitions. [2020-10-27 19:46:34,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:34,988 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 179 transitions. [2020-10-27 19:46:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:34,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:34,989 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:34,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:46:34,989 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:34,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1773243749, now seen corresponding path program 1 times [2020-10-27 19:46:34,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:34,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296611282] [2020-10-27 19:46:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:35,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:35,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:35,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:35,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:35,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:35,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:35,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:35,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:35,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:35,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:35,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296611282] [2020-10-27 19:46:35,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:35,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:46:35,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291236436] [2020-10-27 19:46:35,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:35,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:35,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:35,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:35,173 INFO L87 Difference]: Start difference. First operand 144 states and 179 transitions. Second operand 6 states. [2020-10-27 19:46:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:35,552 INFO L93 Difference]: Finished difference Result 249 states and 314 transitions. [2020-10-27 19:46:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:35,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 19:46:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:35,555 INFO L225 Difference]: With dead ends: 249 [2020-10-27 19:46:35,555 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 19:46:35,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 19:46:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 171. [2020-10-27 19:46:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 19:46:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2020-10-27 19:46:35,578 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 35 [2020-10-27 19:46:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:35,580 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2020-10-27 19:46:35,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2020-10-27 19:46:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:46:35,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:35,583 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:35,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:46:35,585 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1432479821, now seen corresponding path program 1 times [2020-10-27 19:46:35,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:35,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753354225] [2020-10-27 19:46:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:35,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:46:35,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:35,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 19:46:35,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:35,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:35,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 19:46:35,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:35,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:36,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:36,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:36,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:36,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753354225] [2020-10-27 19:46:36,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:36,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:46:36,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829642617] [2020-10-27 19:46:36,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:36,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:36,091 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand 7 states. [2020-10-27 19:46:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:36,577 INFO L93 Difference]: Finished difference Result 269 states and 338 transitions. [2020-10-27 19:46:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:36,577 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-27 19:46:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:36,579 INFO L225 Difference]: With dead ends: 269 [2020-10-27 19:46:36,579 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 19:46:36,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 19:46:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 191. [2020-10-27 19:46:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 19:46:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 238 transitions. [2020-10-27 19:46:36,599 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 238 transitions. Word has length 38 [2020-10-27 19:46:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:36,599 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 238 transitions. [2020-10-27 19:46:36,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 238 transitions. [2020-10-27 19:46:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:46:36,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:36,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:36,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:46:36,600 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:36,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1026630451, now seen corresponding path program 1 times [2020-10-27 19:46:36,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:36,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563963226] [2020-10-27 19:46:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:46:36,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:36,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 19:46:36,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 19:46:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:36,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:36,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:36,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:36,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:36,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:36,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:36,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563963226] [2020-10-27 19:46:36,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:36,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:36,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798331570] [2020-10-27 19:46:36,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:36,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:36,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:36,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:36,768 INFO L87 Difference]: Start difference. First operand 191 states and 238 transitions. Second operand 4 states. [2020-10-27 19:46:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:36,993 INFO L93 Difference]: Finished difference Result 410 states and 526 transitions. [2020-10-27 19:46:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:36,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-27 19:46:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:36,995 INFO L225 Difference]: With dead ends: 410 [2020-10-27 19:46:36,995 INFO L226 Difference]: Without dead ends: 299 [2020-10-27 19:46:36,996 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 19:46:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-27 19:46:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 252. [2020-10-27 19:46:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 19:46:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 311 transitions. [2020-10-27 19:46:37,016 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 311 transitions. Word has length 38 [2020-10-27 19:46:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:37,016 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 311 transitions. [2020-10-27 19:46:37,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 311 transitions. [2020-10-27 19:46:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:46:37,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:37,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:37,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:46:37,017 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:37,018 INFO L82 PathProgramCache]: Analyzing trace with hash 5562097, now seen corresponding path program 1 times [2020-10-27 19:46:37,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:37,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825736320] [2020-10-27 19:46:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:37,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:37,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:46:37,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:37,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 19:46:37,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:37,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:37,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 19:46:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:37,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:37,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:37,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:37,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:37,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:37,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:37,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:37,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825736320] [2020-10-27 19:46:37,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:37,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:37,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838264736] [2020-10-27 19:46:37,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:37,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:37,109 INFO L87 Difference]: Start difference. First operand 252 states and 311 transitions. Second operand 4 states. [2020-10-27 19:46:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:37,300 INFO L93 Difference]: Finished difference Result 428 states and 539 transitions. [2020-10-27 19:46:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:37,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-27 19:46:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:37,303 INFO L225 Difference]: With dead ends: 428 [2020-10-27 19:46:37,303 INFO L226 Difference]: Without dead ends: 256 [2020-10-27 19:46:37,304 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 19:46:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-27 19:46:37,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 232. [2020-10-27 19:46:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 19:46:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 286 transitions. [2020-10-27 19:46:37,320 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 286 transitions. Word has length 38 [2020-10-27 19:46:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:37,320 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 286 transitions. [2020-10-27 19:46:37,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 286 transitions. [2020-10-27 19:46:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:46:37,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:37,321 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:37,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:46:37,322 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:37,322 INFO L82 PathProgramCache]: Analyzing trace with hash 820259702, now seen corresponding path program 1 times [2020-10-27 19:46:37,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:37,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354372128] [2020-10-27 19:46:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:37,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:42,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:42,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:46:42,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 19:46:42,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:46:42,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:42,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:42,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 19:46:42,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:46:42,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:42,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:42,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:42,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:42,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:42,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:42,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:42,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354372128] [2020-10-27 19:46:42,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:42,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656608205] [2020-10-27 19:46:42,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:42,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:42,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:42,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:42,914 INFO L87 Difference]: Start difference. First operand 232 states and 286 transitions. Second operand 12 states. [2020-10-27 19:46:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:44,992 INFO L93 Difference]: Finished difference Result 547 states and 685 transitions. [2020-10-27 19:46:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:46:44,993 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 19:46:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:44,996 INFO L225 Difference]: With dead ends: 547 [2020-10-27 19:46:44,997 INFO L226 Difference]: Without dead ends: 543 [2020-10-27 19:46:44,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:46:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-27 19:46:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 254. [2020-10-27 19:46:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 19:46:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 312 transitions. [2020-10-27 19:46:45,020 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 312 transitions. Word has length 42 [2020-10-27 19:46:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:45,020 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 312 transitions. [2020-10-27 19:46:45,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 312 transitions. [2020-10-27 19:46:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:46:45,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:45,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:45,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:46:45,022 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash 863211217, now seen corresponding path program 1 times [2020-10-27 19:46:45,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:45,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363171037] [2020-10-27 19:46:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:46:45,038 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:46:45,038 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:46:45,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:46:45,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:46:45 BoogieIcfgContainer [2020-10-27 19:46:45,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:46:45,065 INFO L168 Benchmark]: Toolchain (without parser) took 26319.08 ms. Allocated memory was 152.0 MB in the beginning and 406.8 MB in the end (delta: 254.8 MB). Free memory was 126.8 MB in the beginning and 267.1 MB in the end (delta: -140.3 MB). Peak memory consumption was 115.2 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:45,065 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory was 124.5 MB in the beginning and 124.4 MB in the end (delta: 114.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:46:45,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.36 ms. Allocated memory is still 152.0 MB. Free memory was 126.1 MB in the beginning and 103.5 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:45,066 INFO L168 Benchmark]: Boogie Preprocessor took 158.35 ms. Allocated memory is still 152.0 MB. Free memory was 103.5 MB in the beginning and 133.5 MB in the end (delta: -30.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:45,067 INFO L168 Benchmark]: RCFGBuilder took 939.34 ms. Allocated memory is still 152.0 MB. Free memory was 133.5 MB in the beginning and 78.5 MB in the end (delta: 55.0 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:45,067 INFO L168 Benchmark]: TraceAbstraction took 24471.71 ms. Allocated memory was 152.0 MB in the beginning and 406.8 MB in the end (delta: 254.8 MB). Free memory was 77.9 MB in the beginning and 267.1 MB in the end (delta: -189.1 MB). Peak memory consumption was 65.2 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:45,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory was 124.5 MB in the beginning and 124.4 MB in the end (delta: 114.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 732.36 ms. Allocated memory is still 152.0 MB. Free memory was 126.1 MB in the beginning and 103.5 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 158.35 ms. Allocated memory is still 152.0 MB. Free memory was 103.5 MB in the beginning and 133.5 MB in the end (delta: -30.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 939.34 ms. Allocated memory is still 152.0 MB. Free memory was 133.5 MB in the beginning and 78.5 MB in the end (delta: 55.0 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24471.71 ms. Allocated memory was 152.0 MB in the beginning and 406.8 MB in the end (delta: 254.8 MB). Free memory was 77.9 MB in the beginning and 267.1 MB in the end (delta: -189.1 MB). Peak memory consumption was 65.2 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: [L1002] SLL* list = malloc(sizeof(SLL)); [L1003] list->next = ((void*)0) [L1004] COND FALSE !(!(list != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1004] list->inner = malloc(sizeof(SLL)) [L1004] EXPR list->inner [L1004] list->inner->next = ((void*)0) [L1004] EXPR list->inner [L1004] list->inner->inner = ((void*)0) [L1004] EXPR list->inner [L1004] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1004] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1006] SLL* end = list; [L1009] COND FALSE !(__VERIFIER_nondet_int()) [L1019] end = ((void*)0) [L1020] end = list [L1023] COND FALSE !(!(((void*)0) != end)) [L1025] COND TRUE ((void*)0) != end [L1027] int len = 0; [L1028] EXPR end->inner [L1028] SLL* inner = end->inner; [L1029] COND TRUE ((void*)0) != inner [L1031] COND TRUE len == 0 [L1032] len = 1 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND FALSE !(!(((void*)0) == inner->inner)) [L1037] EXPR inner->next [L1037] COND FALSE !(!(((void*)0) == inner->next)) [L1038] EXPR inner->inner [L1038] inner = inner->inner [L1039] COND TRUE len == 1 [L1040] EXPR inner->inner [L1040] inner = inner->inner [L1029] COND TRUE ((void*)0) != inner [L1031] COND FALSE !(len == 0) [L1034] len = 2 [L1035] COND FALSE !(!(((void*)0) != inner)) [L1036] EXPR inner->inner [L1036] COND TRUE !(((void*)0) == inner->inner) [L1036] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "sll-01-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 94 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.3s, OverallIterations: 20, TraceHistogramMax: 2, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1552 SDtfs, 1550 SDslu, 2758 SDs, 0 SdLazy, 3478 SolverSat, 367 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=254occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 786 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 579 NumberOfCodeBlocks, 579 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 142438 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 15 PerfectInterpolantSequences, 4/10 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...