/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-circular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:45:57,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:45:57,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:45:57,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:45:57,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:45:57,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:45:57,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:45:57,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:45:57,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:45:57,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:45:57,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:45:57,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:45:57,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:45:57,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:45:57,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:45:57,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:45:57,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:45:57,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:45:57,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:45:57,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:45:57,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:45:57,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:45:57,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:45:57,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:45:57,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:45:57,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:45:57,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:45:57,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:45:57,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:45:57,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:45:57,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:45:57,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:45:57,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:45:57,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:45:57,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:45:57,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:45:57,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:45:57,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:45:57,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:45:57,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:45:57,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:45:57,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:45:57,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:45:57,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:45:57,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:45:57,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:45:57,666 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:45:57,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:45:57,667 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:45:57,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:45:57,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:45:57,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:45:57,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:45:57,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:45:57,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:45:57,668 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:45:57,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:45:57,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:45:57,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:45:57,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:45:57,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:45:57,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:45:57,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:45:57,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:45:57,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:45:57,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:45:57,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:45:57,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:45:57,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:45:57,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:45:57,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:45:57,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:45:58,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:45:58,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:45:58,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:45:58,162 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:45:58,163 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:45:58,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular-2.i [2020-10-27 19:45:58,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b9eaf200/3c8947a12e14444f9b8849723631771b/FLAGaa58bae1c [2020-10-27 19:45:59,010 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:45:59,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-circular-2.i [2020-10-27 19:45:59,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b9eaf200/3c8947a12e14444f9b8849723631771b/FLAGaa58bae1c [2020-10-27 19:45:59,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b9eaf200/3c8947a12e14444f9b8849723631771b [2020-10-27 19:45:59,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:45:59,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:45:59,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:45:59,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:45:59,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:45:59,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178f3ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59, skipping insertion in model container [2020-10-27 19:45:59,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:45:59,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:45:59,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:45:59,703 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:45:59,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:45:59,850 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:45:59,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59 WrapperNode [2020-10-27 19:45:59,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:45:59,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:45:59,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:45:59,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:45:59,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:45:59,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:45:59,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:45:59,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:45:59,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (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 19:46:00,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:00,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:00,058 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:00,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:00,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:00,063 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:00,063 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:00,063 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:00,063 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:00,064 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:00,076 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:00,076 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:00,839 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:00,840 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-27 19:46:00,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:00 BoogieIcfgContainer [2020-10-27 19:46:00,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:00,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:00,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:00,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:00,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:45:59" (1/3) ... [2020-10-27 19:46:00,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb13065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:00, skipping insertion in model container [2020-10-27 19:46:00,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (2/3) ... [2020-10-27 19:46:00,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb13065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:00, skipping insertion in model container [2020-10-27 19:46:00,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:00" (3/3) ... [2020-10-27 19:46:00,865 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-2.i [2020-10-27 19:46:00,880 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:00,891 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:00,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:00,961 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:00,961 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:00,961 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:00,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:00,970 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:00,970 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:00,970 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:00,970 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-27 19:46:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 19:46:01,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:01,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:01,006 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:01,016 INFO L82 PathProgramCache]: Analyzing trace with hash -323057978, now seen corresponding path program 1 times [2020-10-27 19:46:01,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:01,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463271458] [2020-10-27 19:46:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:01,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 19:46:01,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:01,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-27 19:46:01,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:01,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:01,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:46:01,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:01,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:46:01,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:01,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:01,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:01,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:46:01,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:01,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:01,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:01,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463271458] [2020-10-27 19:46:01,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:01,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:46:01,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958576028] [2020-10-27 19:46:01,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:46:01,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:01,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:46:01,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:01,795 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-27 19:46:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:01,952 INFO L93 Difference]: Finished difference Result 75 states and 118 transitions. [2020-10-27 19:46:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:46:01,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 19:46:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:01,964 INFO L225 Difference]: With dead ends: 75 [2020-10-27 19:46:01,965 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 19:46:01,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 19:46:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 19:46:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 19:46:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-27 19:46:02,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2020-10-27 19:46:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:02,013 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-27 19:46:02,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:46:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-27 19:46:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:46:02,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:02,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:02,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:02,015 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:02,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:02,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2142796056, now seen corresponding path program 1 times [2020-10-27 19:46:02,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:02,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126959353] [2020-10-27 19:46:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:46:02,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 19:46:02,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:02,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:02,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:02,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:02,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:02,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:02,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:02,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:02,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126959353] [2020-10-27 19:46:02,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:02,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550875371] [2020-10-27 19:46:02,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:02,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:02,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:02,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:02,240 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-10-27 19:46:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:02,393 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-27 19:46:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:02,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 19:46:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:02,395 INFO L225 Difference]: With dead ends: 47 [2020-10-27 19:46:02,396 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 19:46:02,397 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 19:46:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 19:46:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-10-27 19:46:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 19:46:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-27 19:46:02,406 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 13 [2020-10-27 19:46:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:02,406 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-27 19:46:02,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-27 19:46:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:02,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:02,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:02,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:02,408 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:02,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1634639351, now seen corresponding path program 1 times [2020-10-27 19:46:02,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:02,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004660175] [2020-10-27 19:46:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:02,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:02,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 19:46:02,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:02,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:02,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:46:02,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:02,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:02,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004660175] [2020-10-27 19:46:02,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:02,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:02,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478142142] [2020-10-27 19:46:02,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:02,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:02,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:02,782 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2020-10-27 19:46:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:02,881 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-27 19:46:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:02,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 19:46:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:02,884 INFO L225 Difference]: With dead ends: 75 [2020-10-27 19:46:02,884 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 19:46:02,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 19:46:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-27 19:46:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:46:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 19:46:02,895 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 16 [2020-10-27 19:46:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:02,895 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 19:46:02,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 19:46:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:46:02,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:02,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:02,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:02,897 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash -94271402, now seen corresponding path program 1 times [2020-10-27 19:46:02,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:02,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773635506] [2020-10-27 19:46:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:46:03,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 19:46:03,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:03,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:03,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:03,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:03,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:03,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773635506] [2020-10-27 19:46:03,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:03,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:03,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571733818] [2020-10-27 19:46:03,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:03,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:03,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:03,241 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 6 states. [2020-10-27 19:46:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:03,458 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-27 19:46:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:03,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 19:46:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:03,460 INFO L225 Difference]: With dead ends: 53 [2020-10-27 19:46:03,460 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 19:46:03,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 19:46:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 19:46:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:46:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-27 19:46:03,469 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 19 [2020-10-27 19:46:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:03,469 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-27 19:46:03,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:03,469 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-27 19:46:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:46:03,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:03,470 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:03,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:03,471 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash -260953347, now seen corresponding path program 1 times [2020-10-27 19:46:03,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:03,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805342688] [2020-10-27 19:46:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:46:03,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 19:46:03,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:03,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:03,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:03,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:03,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:03,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:03,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,788 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 19:46:03,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805342688] [2020-10-27 19:46:03,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:03,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:46:03,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173293167] [2020-10-27 19:46:03,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:03,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:03,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:03,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:03,791 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-10-27 19:46:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:03,950 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-10-27 19:46:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:03,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 19:46:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:03,952 INFO L225 Difference]: With dead ends: 67 [2020-10-27 19:46:03,952 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 19:46:03,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 19:46:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-10-27 19:46:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 19:46:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-27 19:46:03,961 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 19 [2020-10-27 19:46:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:03,962 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-27 19:46:03,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-27 19:46:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:46:03,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:03,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:03,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:03,964 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1259149770, now seen corresponding path program 1 times [2020-10-27 19:46:03,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:03,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077063496] [2020-10-27 19:46:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:46:04,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:04,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-27 19:46:04,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:46:04,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:04,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:04,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:04,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:04,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:04,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:04,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077063496] [2020-10-27 19:46:04,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:04,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773841650] [2020-10-27 19:46:04,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:04,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:04,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:04,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:04,670 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 4 states. [2020-10-27 19:46:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:04,810 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-10-27 19:46:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:04,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 19:46:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:04,812 INFO L225 Difference]: With dead ends: 100 [2020-10-27 19:46:04,815 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 19:46:04,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 19:46:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2020-10-27 19:46:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 19:46:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-27 19:46:04,834 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 23 [2020-10-27 19:46:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:04,835 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-27 19:46:04,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-27 19:46:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:04,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:04,836 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:04,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:04,837 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash -136050517, now seen corresponding path program 1 times [2020-10-27 19:46:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:04,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700042606] [2020-10-27 19:46:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:05,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:05,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-27 19:46:05,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:05,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:05,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:05,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:05,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:05,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:46:05,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,642 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 19:46:05,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700042606] [2020-10-27 19:46:05,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:05,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:05,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131206976] [2020-10-27 19:46:05,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:05,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:05,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:05,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:05,646 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 8 states. [2020-10-27 19:46:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:06,193 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-10-27 19:46:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:06,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 19:46:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:06,197 INFO L225 Difference]: With dead ends: 81 [2020-10-27 19:46:06,197 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 19:46:06,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 19:46:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-27 19:46:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 19:46:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-27 19:46:06,219 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 25 [2020-10-27 19:46:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:06,223 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-27 19:46:06,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-27 19:46:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:06,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:06,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:06,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:06,227 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash -302732462, now seen corresponding path program 2 times [2020-10-27 19:46:06,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:06,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518873705] [2020-10-27 19:46:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:06,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:06,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 19:46:06,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:06,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:06,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:06,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:06,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:06,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:06,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:06,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:06,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:06,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518873705] [2020-10-27 19:46:06,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:06,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:46:06,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088906325] [2020-10-27 19:46:06,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:06,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:06,802 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 7 states. [2020-10-27 19:46:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:06,968 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-27 19:46:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:06,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 19:46:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:06,969 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:46:06,969 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 19:46:06,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 19:46:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-27 19:46:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 19:46:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-10-27 19:46:06,986 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 25 [2020-10-27 19:46:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:06,989 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-10-27 19:46:06,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-10-27 19:46:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:06,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:06,991 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:06,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:06,991 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:06,992 INFO L82 PathProgramCache]: Analyzing trace with hash -101173952, now seen corresponding path program 2 times [2020-10-27 19:46:06,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:06,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936191309] [2020-10-27 19:46:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:07,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:07,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:07,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:07,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-27 19:46:07,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:07,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:07,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:07,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:07,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:07,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:07,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:07,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:07,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:07,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936191309] [2020-10-27 19:46:07,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:07,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:07,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891429732] [2020-10-27 19:46:07,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:07,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:07,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:07,880 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 10 states. [2020-10-27 19:46:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:08,383 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2020-10-27 19:46:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:08,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 19:46:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:08,387 INFO L225 Difference]: With dead ends: 97 [2020-10-27 19:46:08,387 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 19:46:08,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:08,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 19:46:08,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-10-27 19:46:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:46:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-10-27 19:46:08,401 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 31 [2020-10-27 19:46:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:08,402 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-10-27 19:46:08,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-10-27 19:46:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:08,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:08,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:08,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:08,404 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:08,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1964623457, now seen corresponding path program 1 times [2020-10-27 19:46:08,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:08,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808671852] [2020-10-27 19:46:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:08,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:09,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:09,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:09,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-27 19:46:09,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:09,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:09,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 19:46:09,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 19:46:09,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:09,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:09,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:09,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:09,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:09,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:09,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:09,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:09,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808671852] [2020-10-27 19:46:09,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:09,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:46:09,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399624667] [2020-10-27 19:46:09,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:09,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:09,959 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 7 states. [2020-10-27 19:46:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:10,145 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-10-27 19:46:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:10,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 19:46:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:10,146 INFO L225 Difference]: With dead ends: 95 [2020-10-27 19:46:10,147 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 19:46:10,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 19:46:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 19:46:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-27 19:46:10,155 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 32 [2020-10-27 19:46:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:10,156 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-27 19:46:10,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-27 19:46:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:10,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:10,157 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:10,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:10,157 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1192796396, now seen corresponding path program 1 times [2020-10-27 19:46:10,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:10,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749370653] [2020-10-27 19:46:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:10,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:10,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:10,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:10,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 19:46:10,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:46:10,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:11,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:11,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:11,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:11,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:11,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:11,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:11,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:11,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:11,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:11,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:11,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:11,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749370653] [2020-10-27 19:46:11,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:11,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:11,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573614322] [2020-10-27 19:46:11,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:11,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:11,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:11,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:11,209 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 11 states. [2020-10-27 19:46:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:11,783 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-10-27 19:46:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:11,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 19:46:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:11,785 INFO L225 Difference]: With dead ends: 100 [2020-10-27 19:46:11,785 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 19:46:11,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 19:46:11,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-10-27 19:46:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 19:46:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-27 19:46:11,796 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 32 [2020-10-27 19:46:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:11,797 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-27 19:46:11,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-27 19:46:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:11,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:11,798 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:11,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:11,798 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:11,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1306519326, now seen corresponding path program 2 times [2020-10-27 19:46:11,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:11,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354661256] [2020-10-27 19:46:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:11,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:12,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:12,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-27 19:46:12,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:46:12,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:12,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:12,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:12,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:12,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:12,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:12,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:12,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354661256] [2020-10-27 19:46:12,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:12,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:12,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372132170] [2020-10-27 19:46:12,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:12,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:12,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:12,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:12,509 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 10 states. [2020-10-27 19:46:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:12,978 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2020-10-27 19:46:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:12,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 19:46:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:12,980 INFO L225 Difference]: With dead ends: 107 [2020-10-27 19:46:12,980 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 19:46:12,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 19:46:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2020-10-27 19:46:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:46:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-27 19:46:12,990 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 32 [2020-10-27 19:46:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:12,990 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-27 19:46:12,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-27 19:46:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:12,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:12,991 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:12,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:12,992 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash -394414092, now seen corresponding path program 1 times [2020-10-27 19:46:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:12,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871242588] [2020-10-27 19:46:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:13,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-27 19:46:13,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:13,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:13,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:46:13,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:13,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:13,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:13,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:13,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:13,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:13,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871242588] [2020-10-27 19:46:13,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:13,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:13,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240081893] [2020-10-27 19:46:13,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:13,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:13,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:13,937 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 11 states. [2020-10-27 19:46:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:14,598 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2020-10-27 19:46:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:14,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 19:46:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:14,600 INFO L225 Difference]: With dead ends: 105 [2020-10-27 19:46:14,600 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 19:46:14,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 19:46:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2020-10-27 19:46:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 19:46:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-10-27 19:46:14,613 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 34 [2020-10-27 19:46:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:14,613 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-10-27 19:46:14,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-10-27 19:46:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:46:14,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:14,615 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:14,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:14,615 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2033966613, now seen corresponding path program 3 times [2020-10-27 19:46:14,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:14,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366358377] [2020-10-27 19:46:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:14,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:15,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:46:15,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:15,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-27 19:46:15,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:46:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:15,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:15,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:15,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:15,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:15,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:46:15,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:15,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:15,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:15,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:15,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:15,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366358377] [2020-10-27 19:46:15,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:15,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:15,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883071247] [2020-10-27 19:46:15,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:15,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:15,970 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 12 states. [2020-10-27 19:46:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:16,729 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2020-10-27 19:46:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:16,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-27 19:46:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:16,732 INFO L225 Difference]: With dead ends: 119 [2020-10-27 19:46:16,732 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 19:46:16,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 19:46:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-27 19:46:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 19:46:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-27 19:46:16,743 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 37 [2020-10-27 19:46:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:16,743 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-27 19:46:16,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-27 19:46:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:46:16,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:16,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:16,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:46:16,745 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1716652633, now seen corresponding path program 1 times [2020-10-27 19:46:16,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:16,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420092955] [2020-10-27 19:46:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:16,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:17,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:46:17,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 813 [2020-10-27 19:46:17,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:46:17,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:18,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:18,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:18,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:18,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:18,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:18,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:18,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420092955] [2020-10-27 19:46:18,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:18,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:18,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752913113] [2020-10-27 19:46:18,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:18,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:18,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:18,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:18,142 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 12 states. [2020-10-27 19:46:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:18,728 INFO L93 Difference]: Finished difference Result 154 states and 182 transitions. [2020-10-27 19:46:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:18,729 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-27 19:46:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:18,730 INFO L225 Difference]: With dead ends: 154 [2020-10-27 19:46:18,730 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 19:46:18,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 19:46:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2020-10-27 19:46:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 19:46:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-10-27 19:46:18,759 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 37 [2020-10-27 19:46:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:18,759 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-10-27 19:46:18,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-10-27 19:46:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:46:18,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:18,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:18,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:46:18,761 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:18,762 INFO L82 PathProgramCache]: Analyzing trace with hash -307330326, now seen corresponding path program 1 times [2020-10-27 19:46:18,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:18,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787202142] [2020-10-27 19:46:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:19,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:19,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:46:19,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:19,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-27 19:46:19,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:46:19,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:19,704 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-27 19:46:19,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:19,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:19,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:19,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:19,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:19,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:19,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787202142] [2020-10-27 19:46:19,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:19,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:19,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667972442] [2020-10-27 19:46:19,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:19,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:19,837 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 10 states. [2020-10-27 19:46:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:20,485 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2020-10-27 19:46:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:20,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 19:46:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:20,486 INFO L225 Difference]: With dead ends: 130 [2020-10-27 19:46:20,486 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 19:46:20,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 19:46:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-27 19:46:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 19:46:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2020-10-27 19:46:20,499 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 38 [2020-10-27 19:46:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:20,499 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2020-10-27 19:46:20,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2020-10-27 19:46:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:46:20,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:20,500 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:20,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:46:20,500 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1223599895, now seen corresponding path program 3 times [2020-10-27 19:46:20,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:20,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087406948] [2020-10-27 19:46:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:20,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:21,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:46:21,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:21,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-27 19:46:21,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:46:21,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:21,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:21,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:21,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:21,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:21,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:21,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:21,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:21,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:21,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:22,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087406948] [2020-10-27 19:46:22,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:22,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934986016] [2020-10-27 19:46:22,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:22,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:22,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:22,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:22,012 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 13 states. [2020-10-27 19:46:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:22,944 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2020-10-27 19:46:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:22,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 19:46:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:22,947 INFO L225 Difference]: With dead ends: 132 [2020-10-27 19:46:22,947 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 19:46:22,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 19:46:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-10-27 19:46:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 19:46:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-10-27 19:46:22,961 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 38 [2020-10-27 19:46:22,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:22,961 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-10-27 19:46:22,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-10-27 19:46:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:46:22,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:22,962 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:22,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:46:22,962 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash 310522227, now seen corresponding path program 4 times [2020-10-27 19:46:22,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:22,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386286622] [2020-10-27 19:46:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:23,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:23,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:46:23,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:23,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-27 19:46:23,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:46:23,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:24,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:24,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:24,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:24,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:24,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:24,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:24,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386286622] [2020-10-27 19:46:24,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:24,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:24,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939416664] [2020-10-27 19:46:24,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:24,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:24,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:24,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:24,316 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 12 states. [2020-10-27 19:46:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:25,077 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-27 19:46:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:25,078 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 19:46:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:25,080 INFO L225 Difference]: With dead ends: 141 [2020-10-27 19:46:25,080 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 19:46:25,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 19:46:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2020-10-27 19:46:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 19:46:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-10-27 19:46:25,094 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 38 [2020-10-27 19:46:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:25,094 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-10-27 19:46:25,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-10-27 19:46:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:46:25,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:25,095 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:25,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:46:25,096 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash -887495937, now seen corresponding path program 1 times [2020-10-27 19:46:25,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:25,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327798844] [2020-10-27 19:46:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:25,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:46:26,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-27 19:46:26,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:46:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:27,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:27,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327798844] [2020-10-27 19:46:27,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:27,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:27,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729618324] [2020-10-27 19:46:27,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:27,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:27,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:27,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:27,266 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 13 states. [2020-10-27 19:46:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:28,346 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2020-10-27 19:46:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:28,347 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 19:46:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:28,348 INFO L225 Difference]: With dead ends: 139 [2020-10-27 19:46:28,348 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 19:46:28,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 19:46:28,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 114. [2020-10-27 19:46:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 19:46:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2020-10-27 19:46:28,362 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 40 [2020-10-27 19:46:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:28,363 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2020-10-27 19:46:28,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2020-10-27 19:46:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:46:28,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:28,364 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:28,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:46:28,364 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 230080777, now seen corresponding path program 2 times [2020-10-27 19:46:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:28,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973250139] [2020-10-27 19:46:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:29,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:46:29,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:29,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-10-27 19:46:29,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:29,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:46:29,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:29,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:29,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:29,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:29,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 19:46:29,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:29,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973250139] [2020-10-27 19:46:29,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:29,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:29,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169732015] [2020-10-27 19:46:29,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:29,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:29,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:29,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:29,860 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 12 states. [2020-10-27 19:46:30,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:30,700 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2020-10-27 19:46:30,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:30,700 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 19:46:30,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:30,702 INFO L225 Difference]: With dead ends: 148 [2020-10-27 19:46:30,702 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 19:46:30,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 19:46:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2020-10-27 19:46:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 19:46:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-10-27 19:46:30,714 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 40 [2020-10-27 19:46:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:30,714 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-10-27 19:46:30,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-10-27 19:46:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:46:30,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:30,715 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:30,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:46:30,716 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1420874538, now seen corresponding path program 4 times [2020-10-27 19:46:30,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:30,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393822881] [2020-10-27 19:46:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:30,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:31,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:46:31,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:31,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-27 19:46:31,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:31,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:46:31,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:31,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:46:31,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,341 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 19:46:32,479 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 19:46:32,633 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-27 19:46:32,932 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-27 19:46:33,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:33,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:33,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:33,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:33,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:33,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:33,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:33,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:33,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:33,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393822881] [2020-10-27 19:46:33,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:33,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:33,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130291812] [2020-10-27 19:46:33,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:33,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:33,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:33,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:33,076 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 13 states. [2020-10-27 19:46:33,523 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-27 19:46:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:34,029 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2020-10-27 19:46:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:46:34,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 19:46:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:34,032 INFO L225 Difference]: With dead ends: 152 [2020-10-27 19:46:34,032 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 19:46:34,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:46:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 19:46:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 114. [2020-10-27 19:46:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 19:46:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2020-10-27 19:46:34,045 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 43 [2020-10-27 19:46:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:34,045 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2020-10-27 19:46:34,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2020-10-27 19:46:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:46:34,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:34,046 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:34,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:46:34,046 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:34,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1103560558, now seen corresponding path program 1 times [2020-10-27 19:46:34,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:34,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774893204] [2020-10-27 19:46:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:35,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:46:35,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-10-27 19:46:35,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:46:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:46:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:36,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:36,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:36,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:36,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774893204] [2020-10-27 19:46:36,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:36,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:36,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880739473] [2020-10-27 19:46:36,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:36,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:36,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:36,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:36,393 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand 13 states. [2020-10-27 19:46:36,924 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 19:46:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:37,787 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2020-10-27 19:46:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:46:37,789 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 19:46:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:37,793 INFO L225 Difference]: With dead ends: 172 [2020-10-27 19:46:37,793 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 19:46:37,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:46:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 19:46:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2020-10-27 19:46:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 19:46:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 162 transitions. [2020-10-27 19:46:37,818 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 162 transitions. Word has length 43 [2020-10-27 19:46:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:37,818 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 162 transitions. [2020-10-27 19:46:37,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 162 transitions. [2020-10-27 19:46:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:46:37,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:37,819 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:37,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:46:37,820 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:37,820 INFO L82 PathProgramCache]: Analyzing trace with hash 244968740, now seen corresponding path program 2 times [2020-10-27 19:46:37,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:37,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489632067] [2020-10-27 19:46:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:37,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:38,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:46:38,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:38,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-27 19:46:38,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:38,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:46:38,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:39,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:39,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:39,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:39,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:39,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:39,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:39,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:39,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:39,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:39,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:39,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489632067] [2020-10-27 19:46:39,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:39,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:39,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118383911] [2020-10-27 19:46:39,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:39,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:39,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:39,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:39,628 INFO L87 Difference]: Start difference. First operand 136 states and 162 transitions. Second operand 12 states. [2020-10-27 19:46:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:40,425 INFO L93 Difference]: Finished difference Result 184 states and 218 transitions. [2020-10-27 19:46:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:40,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-27 19:46:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:40,429 INFO L225 Difference]: With dead ends: 184 [2020-10-27 19:46:40,429 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 19:46:40,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 19:46:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 136. [2020-10-27 19:46:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 19:46:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2020-10-27 19:46:40,448 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 43 [2020-10-27 19:46:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:40,448 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2020-10-27 19:46:40,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2020-10-27 19:46:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:46:40,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:40,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:40,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:46:40,449 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash -329683868, now seen corresponding path program 3 times [2020-10-27 19:46:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:40,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220754989] [2020-10-27 19:46:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:40,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:41,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:46:41,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:41,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-27 19:46:41,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:46:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:46:41,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:42,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:42,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:42,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:42,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:42,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:42,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:42,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:42,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:42,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220754989] [2020-10-27 19:46:42,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:42,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:42,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285868121] [2020-10-27 19:46:42,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:42,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:42,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:42,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:42,435 INFO L87 Difference]: Start difference. First operand 136 states and 163 transitions. Second operand 13 states. [2020-10-27 19:46:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:43,724 INFO L93 Difference]: Finished difference Result 176 states and 209 transitions. [2020-10-27 19:46:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:43,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 19:46:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:43,727 INFO L225 Difference]: With dead ends: 176 [2020-10-27 19:46:43,727 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 19:46:43,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 19:46:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 144. [2020-10-27 19:46:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 19:46:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 175 transitions. [2020-10-27 19:46:43,746 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 175 transitions. Word has length 43 [2020-10-27 19:46:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:43,746 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 175 transitions. [2020-10-27 19:46:43,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 175 transitions. [2020-10-27 19:46:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:46:43,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:43,747 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:43,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:46:43,747 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:43,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2133315467, now seen corresponding path program 2 times [2020-10-27 19:46:43,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:43,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716741507] [2020-10-27 19:46:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:43,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:44,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:44,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:46:44,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:44,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 19:46:44,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:44,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:44,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:46:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:44,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:44,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:44,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:44,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:44,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:44,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:44,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:44,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:44,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716741507] [2020-10-27 19:46:44,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:44,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:44,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451593502] [2020-10-27 19:46:44,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:44,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:45,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:45,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:45,000 INFO L87 Difference]: Start difference. First operand 144 states and 175 transitions. Second operand 12 states. [2020-10-27 19:46:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:45,545 INFO L93 Difference]: Finished difference Result 172 states and 205 transitions. [2020-10-27 19:46:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:45,545 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-27 19:46:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:45,547 INFO L225 Difference]: With dead ends: 172 [2020-10-27 19:46:45,547 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 19:46:45,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 19:46:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2020-10-27 19:46:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 19:46:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 193 transitions. [2020-10-27 19:46:45,580 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 193 transitions. Word has length 44 [2020-10-27 19:46:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:45,581 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 193 transitions. [2020-10-27 19:46:45,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 193 transitions. [2020-10-27 19:46:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:46:45,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:45,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:45,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:46:45,582 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash 445149105, now seen corresponding path program 1 times [2020-10-27 19:46:45,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:45,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125707785] [2020-10-27 19:46:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:45,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:46,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:46:46,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:46,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-27 19:46:46,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:46,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:46,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:46,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:46:46,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:46,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:46,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:46,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:46,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:46,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:46,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125707785] [2020-10-27 19:46:46,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:46,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:46,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735341114] [2020-10-27 19:46:46,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:46,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:46,529 INFO L87 Difference]: Start difference. First operand 160 states and 193 transitions. Second operand 11 states. [2020-10-27 19:46:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:47,085 INFO L93 Difference]: Finished difference Result 195 states and 230 transitions. [2020-10-27 19:46:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:47,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-27 19:46:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:47,088 INFO L225 Difference]: With dead ends: 195 [2020-10-27 19:46:47,088 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 19:46:47,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 19:46:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 166. [2020-10-27 19:46:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 19:46:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 201 transitions. [2020-10-27 19:46:47,110 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 201 transitions. Word has length 44 [2020-10-27 19:46:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:47,110 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 201 transitions. [2020-10-27 19:46:47,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 201 transitions. [2020-10-27 19:46:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:46:47,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:47,111 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:47,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:46:47,111 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1016358507, now seen corresponding path program 1 times [2020-10-27 19:46:47,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:47,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405289624] [2020-10-27 19:46:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:47,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:47,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:46:47,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-27 19:46:47,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:46:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:47,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:46:47,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:48,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:48,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:48,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:48,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:48,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:48,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:48,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:48,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:48,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:48,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:48,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405289624] [2020-10-27 19:46:48,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:48,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:48,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384551739] [2020-10-27 19:46:48,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:48,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:48,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:48,344 INFO L87 Difference]: Start difference. First operand 166 states and 201 transitions. Second operand 13 states. [2020-10-27 19:46:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:49,165 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2020-10-27 19:46:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:49,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 19:46:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:49,168 INFO L225 Difference]: With dead ends: 201 [2020-10-27 19:46:49,168 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 19:46:49,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 19:46:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 167. [2020-10-27 19:46:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 19:46:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2020-10-27 19:46:49,189 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 45 [2020-10-27 19:46:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:49,190 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2020-10-27 19:46:49,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2020-10-27 19:46:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:46:49,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:49,191 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:49,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:46:49,191 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:49,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:49,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2099984340, now seen corresponding path program 3 times [2020-10-27 19:46:49,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:49,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765025357] [2020-10-27 19:46:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:49,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:51,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:46:51,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:51,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2069 [2020-10-27 19:46:51,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:51,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:46:51,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:51,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:46:51,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:52,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:52,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:52,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:52,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:52,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:52,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:52,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:52,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765025357] [2020-10-27 19:46:52,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:52,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:46:52,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200448158] [2020-10-27 19:46:52,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:46:52,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:52,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:46:52,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:52,143 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand 14 states. [2020-10-27 19:46:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:53,309 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2020-10-27 19:46:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:46:53,309 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-27 19:46:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:53,311 INFO L225 Difference]: With dead ends: 210 [2020-10-27 19:46:53,311 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 19:46:53,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:46:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 19:46:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 169. [2020-10-27 19:46:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 19:46:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2020-10-27 19:46:53,332 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 46 [2020-10-27 19:46:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:53,332 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2020-10-27 19:46:53,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:46:53,332 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2020-10-27 19:46:53,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:46:53,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:53,333 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:53,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:46:53,333 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1908453451, now seen corresponding path program 1 times [2020-10-27 19:46:53,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:53,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612664947] [2020-10-27 19:46:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:53,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:46:54,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:54,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-27 19:46:54,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:46:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:46:54,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:54,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:54,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:54,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:54,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:54,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:54,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:54,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612664947] [2020-10-27 19:46:54,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:54,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830612231] [2020-10-27 19:46:54,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:54,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:54,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:54,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:54,445 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand 12 states. [2020-10-27 19:46:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:55,106 INFO L93 Difference]: Finished difference Result 203 states and 240 transitions. [2020-10-27 19:46:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:55,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 19:46:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:55,109 INFO L225 Difference]: With dead ends: 203 [2020-10-27 19:46:55,109 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 19:46:55,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 19:46:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 176. [2020-10-27 19:46:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 19:46:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 212 transitions. [2020-10-27 19:46:55,130 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 212 transitions. Word has length 47 [2020-10-27 19:46:55,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:55,130 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 212 transitions. [2020-10-27 19:46:55,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 212 transitions. [2020-10-27 19:46:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:46:55,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:55,131 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:55,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:46:55,132 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:55,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:55,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1427420182, now seen corresponding path program 4 times [2020-10-27 19:46:55,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:55,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229156426] [2020-10-27 19:46:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:55,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:55,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:57,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:46:57,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:57,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2000 [2020-10-27 19:46:57,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 19:46:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:46:57,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:57,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:57,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:57,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:57,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:57,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:57,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:57,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:57,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 19:46:57,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229156426] [2020-10-27 19:46:57,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:57,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:57,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110668654] [2020-10-27 19:46:57,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:57,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:57,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:57,209 INFO L87 Difference]: Start difference. First operand 176 states and 212 transitions. Second operand 4 states. [2020-10-27 19:46:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:57,343 INFO L93 Difference]: Finished difference Result 269 states and 320 transitions. [2020-10-27 19:46:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:57,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-27 19:46:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:57,345 INFO L225 Difference]: With dead ends: 269 [2020-10-27 19:46:57,345 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 19:46:57,346 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 19:46:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 19:46:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 166. [2020-10-27 19:46:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 19:46:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 192 transitions. [2020-10-27 19:46:57,375 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 192 transitions. Word has length 48 [2020-10-27 19:46:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:57,375 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 192 transitions. [2020-10-27 19:46:57,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 192 transitions. [2020-10-27 19:46:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:46:57,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:57,376 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:57,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:46:57,376 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash 816184953, now seen corresponding path program 4 times [2020-10-27 19:46:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:57,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985838172] [2020-10-27 19:46:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2005 [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:46:59,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:00,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:00,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:00,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:00,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:00,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:00,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:00,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:00,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:00,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:00,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985838172] [2020-10-27 19:47:00,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:00,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:00,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303486626] [2020-10-27 19:47:00,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:00,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:00,264 INFO L87 Difference]: Start difference. First operand 166 states and 192 transitions. Second operand 14 states. [2020-10-27 19:47:00,826 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 19:47:01,065 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 19:47:01,289 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-27 19:47:02,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:02,102 INFO L93 Difference]: Finished difference Result 236 states and 269 transitions. [2020-10-27 19:47:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:47:02,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 19:47:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:02,104 INFO L225 Difference]: With dead ends: 236 [2020-10-27 19:47:02,104 INFO L226 Difference]: Without dead ends: 232 [2020-10-27 19:47:02,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-27 19:47:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-27 19:47:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 19:47:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 188 transitions. [2020-10-27 19:47:02,127 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 188 transitions. Word has length 49 [2020-10-27 19:47:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:02,128 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 188 transitions. [2020-10-27 19:47:02,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 188 transitions. [2020-10-27 19:47:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:47:02,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:02,129 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:02,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:47:02,130 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:02,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:02,130 INFO L82 PathProgramCache]: Analyzing trace with hash 241532345, now seen corresponding path program 5 times [2020-10-27 19:47:02,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:02,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698761129] [2020-10-27 19:47:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:02,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:47:03,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:03,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1735 [2020-10-27 19:47:03,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:47:03,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:04,660 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-27 19:47:04,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:04,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:04,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:04,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:04,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:04,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:04,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:04,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:04,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698761129] [2020-10-27 19:47:04,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:04,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:04,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820376893] [2020-10-27 19:47:04,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:04,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:04,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:04,902 INFO L87 Difference]: Start difference. First operand 163 states and 188 transitions. Second operand 14 states. [2020-10-27 19:47:05,278 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-27 19:47:05,433 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 19:47:05,731 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-27 19:47:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:06,252 INFO L93 Difference]: Finished difference Result 220 states and 250 transitions. [2020-10-27 19:47:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:47:06,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 19:47:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:06,255 INFO L225 Difference]: With dead ends: 220 [2020-10-27 19:47:06,255 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 19:47:06,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:47:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 19:47:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 137. [2020-10-27 19:47:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 19:47:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-10-27 19:47:06,275 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 49 [2020-10-27 19:47:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:06,275 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-10-27 19:47:06,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-10-27 19:47:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:47:06,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:06,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:06,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:47:06,276 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -105653713, now seen corresponding path program 6 times [2020-10-27 19:47:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:06,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721033150] [2020-10-27 19:47:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:06,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:07,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:07,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:47:07,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:07,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1243 [2020-10-27 19:47:07,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:07,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:07,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:07,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:47:07,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:08,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:08,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:08,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:08,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:08,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:08,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:08,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:08,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:08,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721033150] [2020-10-27 19:47:08,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:08,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:08,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493355048] [2020-10-27 19:47:08,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:08,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:08,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:08,529 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 14 states. [2020-10-27 19:47:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:09,481 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2020-10-27 19:47:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:09,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 19:47:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:09,483 INFO L225 Difference]: With dead ends: 173 [2020-10-27 19:47:09,483 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 19:47:09,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:47:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 19:47:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 115. [2020-10-27 19:47:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 19:47:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2020-10-27 19:47:09,502 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 49 [2020-10-27 19:47:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:09,502 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2020-10-27 19:47:09,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2020-10-27 19:47:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:47:09,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:09,503 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:09,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:47:09,504 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1605482048, now seen corresponding path program 3 times [2020-10-27 19:47:09,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:09,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829665702] [2020-10-27 19:47:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:10,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:47:10,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:10,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 869 [2020-10-27 19:47:10,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:10,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:10,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:10,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:10,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:11,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:11,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:11,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:11,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:11,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:11,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:11,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:11,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:11,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:11,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:11,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:47:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:11,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829665702] [2020-10-27 19:47:11,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:11,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:11,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906683024] [2020-10-27 19:47:11,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:11,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:11,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:11,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:11,130 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand 14 states. [2020-10-27 19:47:11,575 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-27 19:47:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:11,963 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2020-10-27 19:47:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:11,964 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-27 19:47:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:11,965 INFO L225 Difference]: With dead ends: 158 [2020-10-27 19:47:11,966 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 19:47:11,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 19:47:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 121. [2020-10-27 19:47:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 19:47:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2020-10-27 19:47:11,987 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 50 [2020-10-27 19:47:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:11,987 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2020-10-27 19:47:11,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2020-10-27 19:47:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:47:11,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:11,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:11,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:47:11,989 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash 972982524, now seen corresponding path program 1 times [2020-10-27 19:47:11,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:11,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452614060] [2020-10-27 19:47:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:12,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:13,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:13,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:47:13,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:13,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-27 19:47:13,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:13,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:13,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:13,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:13,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:13,399 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-27 19:47:13,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:13,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:13,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:13,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:13,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:13,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:13,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:13,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:13,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452614060] [2020-10-27 19:47:13,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:13,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:13,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534981189] [2020-10-27 19:47:13,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:13,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:13,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:13,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:13,845 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand 14 states. [2020-10-27 19:47:14,317 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-27 19:47:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:14,833 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2020-10-27 19:47:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:14,834 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-27 19:47:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:14,836 INFO L225 Difference]: With dead ends: 176 [2020-10-27 19:47:14,836 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 19:47:14,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 19:47:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-27 19:47:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 19:47:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2020-10-27 19:47:14,854 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 50 [2020-10-27 19:47:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:14,854 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2020-10-27 19:47:14,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2020-10-27 19:47:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:47:14,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:14,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:14,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:47:14,855 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1199850682, now seen corresponding path program 2 times [2020-10-27 19:47:14,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:14,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075469382] [2020-10-27 19:47:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:14,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:15,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:15,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:47:15,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-27 19:47:15,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:16,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:16,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:16,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:16,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:16,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:16,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:16,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:16,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:16,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:16,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:16,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075469382] [2020-10-27 19:47:16,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:16,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:16,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111043861] [2020-10-27 19:47:16,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:16,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:16,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:16,117 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand 13 states. [2020-10-27 19:47:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:16,983 INFO L93 Difference]: Finished difference Result 194 states and 219 transitions. [2020-10-27 19:47:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:16,984 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-27 19:47:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:16,986 INFO L225 Difference]: With dead ends: 194 [2020-10-27 19:47:16,986 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 19:47:16,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 19:47:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133. [2020-10-27 19:47:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 19:47:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2020-10-27 19:47:17,009 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 50 [2020-10-27 19:47:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:17,009 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2020-10-27 19:47:17,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2020-10-27 19:47:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:47:17,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:17,010 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:17,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:47:17,010 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:17,011 INFO L82 PathProgramCache]: Analyzing trace with hash 109867541, now seen corresponding path program 4 times [2020-10-27 19:47:17,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:17,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25768192] [2020-10-27 19:47:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:17,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:17,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:17,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:47:17,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:17,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-10-27 19:47:17,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:17,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:17,840 ERROR L253 erpolLogProxyWrapper]: Interpolant 43 not inductive [2020-10-27 19:47:17,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:47:17,843 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 19:47:17,855 INFO L168 Benchmark]: Toolchain (without parser) took 78598.05 ms. Allocated memory was 157.3 MB in the beginning and 815.8 MB in the end (delta: 658.5 MB). Free memory was 131.2 MB in the beginning and 408.9 MB in the end (delta: -277.7 MB). Peak memory consumption was 381.8 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:17,856 INFO L168 Benchmark]: CDTParser took 1.30 ms. Allocated memory is still 157.3 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:47:17,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 588.95 ms. Allocated memory is still 157.3 MB. Free memory was 130.5 MB in the beginning and 108.8 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:17,859 INFO L168 Benchmark]: Boogie Preprocessor took 103.88 ms. Allocated memory is still 157.3 MB. Free memory was 108.8 MB in the beginning and 106.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:17,860 INFO L168 Benchmark]: RCFGBuilder took 885.31 ms. Allocated memory is still 157.3 MB. Free memory was 106.0 MB in the beginning and 97.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:17,860 INFO L168 Benchmark]: TraceAbstraction took 77004.62 ms. Allocated memory was 157.3 MB in the beginning and 815.8 MB in the end (delta: 658.5 MB). Free memory was 97.4 MB in the beginning and 408.9 MB in the end (delta: -311.6 MB). Peak memory consumption was 346.9 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:17,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.30 ms. Allocated memory is still 157.3 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 588.95 ms. Allocated memory is still 157.3 MB. Free memory was 130.5 MB in the beginning and 108.8 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 103.88 ms. Allocated memory is still 157.3 MB. Free memory was 108.8 MB in the beginning and 106.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 885.31 ms. Allocated memory is still 157.3 MB. Free memory was 106.0 MB in the beginning and 97.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 77004.62 ms. Allocated memory was 157.3 MB in the beginning and 815.8 MB in the end (delta: 658.5 MB). Free memory was 97.4 MB in the beginning and 408.9 MB in the end (delta: -311.6 MB). Peak memory consumption was 346.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...