/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:10:05,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:10:05,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:10:05,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:10:05,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:10:05,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:10:05,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:10:05,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:10:05,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:10:05,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:10:05,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:10:05,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:10:05,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:10:05,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:10:05,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:10:05,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:10:05,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:10:05,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:10:05,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:10:05,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:10:05,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:10:05,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:10:05,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:10:05,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:10:05,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:10:05,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:10:05,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:10:05,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:10:05,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:10:05,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:10:05,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:10:05,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:10:05,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:10:05,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:10:05,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:10:05,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:10:05,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:10:05,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:10:05,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:10:05,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:10:05,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:10:05,769 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 [2020-10-29 09:10:05,817 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:10:05,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:10:05,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:10:05,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:10:05,823 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:10:05,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:10:05,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:10:05,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:10:05,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:10:05,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:10:05,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:10:05,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:10:05,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:10:05,825 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:10:05,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:10:05,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:10:05,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:10:05,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:10:05,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:10:05,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:10:05,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:10:05,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:05,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:10:05,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:10:05,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:10:05,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:10:05,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:10:05,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:10:05,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:10:05,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:10:06,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:10:06,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:10:06,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:10:06,330 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:10:06,331 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:10:06,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-2.i [2020-10-29 09:10:06,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1aa76a88/5726274c940c496284da00d19e24f0f1/FLAG8c4744ea3 [2020-10-29 09:10:07,241 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:10:07,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-2.i [2020-10-29 09:10:07,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1aa76a88/5726274c940c496284da00d19e24f0f1/FLAG8c4744ea3 [2020-10-29 09:10:07,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1aa76a88/5726274c940c496284da00d19e24f0f1 [2020-10-29 09:10:07,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:10:07,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:10:07,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:07,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:10:07,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:10:07,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:07" (1/1) ... [2020-10-29 09:10:07,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5021728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:07, skipping insertion in model container [2020-10-29 09:10:07,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:07" (1/1) ... [2020-10-29 09:10:07,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:10:07,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:10:07,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:07,920 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:10:07,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:08,039 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:10:08,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08 WrapperNode [2020-10-29 09:10:08,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:08,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:10:08,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:10:08,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:10:08,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (1/1) ... [2020-10-29 09:10:08,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (1/1) ... [2020-10-29 09:10:08,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (1/1) ... [2020-10-29 09:10:08,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (1/1) ... [2020-10-29 09:10:08,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (1/1) ... [2020-10-29 09:10:08,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (1/1) ... [2020-10-29 09:10:08,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (1/1) ... [2020-10-29 09:10:08,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:10:08,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:10:08,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:10:08,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:10:08,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (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 [2020-10-29 09:10:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:10:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:10:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:10:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:10:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:10:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:10:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:10:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:10:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:10:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:10:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:10:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:10:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:10:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:10:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:10:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:10:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:10:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:10:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:10:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:10:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:10:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:10:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:10:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:10:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:10:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:10:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:10:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:10:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:10:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:10:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:10:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:10:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:10:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:10:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:10:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:10:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:10:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:10:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:10:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:10:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:10:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:10:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:10:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:10:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:10:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:10:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:10:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:10:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:10:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:10:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:10:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:10:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:10:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:10:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:10:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:10:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:10:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:10:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:10:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:10:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:10:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:10:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:10:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:10:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:10:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:10:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:10:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:10:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:10:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:10:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:10:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:10:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:10:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:10:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:10:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:10:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:10:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:10:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:10:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:10:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:10:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:10:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:10:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:10:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:10:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:10:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:10:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:10:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:10:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:10:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:10:08,304 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:10:08,304 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:10:08,304 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:10:08,304 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:10:08,304 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:10:08,304 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:10:08,304 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:10:08,305 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:10:08,305 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:10:08,305 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:10:08,305 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:10:08,305 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:10:08,305 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:10:08,305 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:10:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:10:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:10:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:10:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:10:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:10:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:10:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:10:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:10:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:10:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:10:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:10:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:10:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:10:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:10:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:10:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:10:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:10:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:10:09,123 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:10:09,124 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-29 09:10:09,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:09 BoogieIcfgContainer [2020-10-29 09:10:09,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:10:09,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:10:09,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:10:09,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:10:09,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:10:07" (1/3) ... [2020-10-29 09:10:09,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3561854e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:09, skipping insertion in model container [2020-10-29 09:10:09,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:08" (2/3) ... [2020-10-29 09:10:09,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3561854e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:09, skipping insertion in model container [2020-10-29 09:10:09,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:09" (3/3) ... [2020-10-29 09:10:09,148 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-2.i [2020-10-29 09:10:09,165 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:10:09,173 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:10:09,190 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:10:09,234 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:10:09,235 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:10:09,235 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:10:09,236 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:10:09,242 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:10:09,243 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:10:09,243 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:10:09,243 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:10:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-29 09:10:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:10:09,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:09,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:09,283 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash 444257067, now seen corresponding path program 1 times [2020-10-29 09:10:09,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:09,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633310886] [2020-10-29 09:10:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:09,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:09,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:10,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-29 09:10:10,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:10,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-29 09:10:10,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:10,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:10,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:10,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:10,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:10:10,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:10:10,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:10,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:10,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:10,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:10,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:10:10,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:10,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:10,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:10,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633310886] [2020-10-29 09:10:10,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:10,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:10,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298775807] [2020-10-29 09:10:10,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:10,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:10,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:10,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:10,317 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 5 states. [2020-10-29 09:10:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:10,653 INFO L93 Difference]: Finished difference Result 106 states and 186 transitions. [2020-10-29 09:10:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:10,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-29 09:10:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:10,669 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:10:10,669 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:10:10,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:10:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-29 09:10:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:10:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-29 09:10:10,737 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 12 [2020-10-29 09:10:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:10,738 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-29 09:10:10,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-29 09:10:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:10:10,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:10,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:10,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:10:10,744 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash 541512391, now seen corresponding path program 1 times [2020-10-29 09:10:10,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:10,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674253488] [2020-10-29 09:10:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:10,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:10,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:10:10,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:10,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-29 09:10:10,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:10,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:10,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:10,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:10:10,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:10:10,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:11,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:11,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:11,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:11,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:11,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:11,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:11,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:11,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:11,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674253488] [2020-10-29 09:10:11,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:11,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:11,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909869142] [2020-10-29 09:10:11,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:11,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:11,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:11,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:11,031 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-10-29 09:10:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:11,252 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-29 09:10:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:11,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-29 09:10:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:11,254 INFO L225 Difference]: With dead ends: 43 [2020-10-29 09:10:11,254 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:10:11,255 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 [2020-10-29 09:10:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:10:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:10:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:10:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-29 09:10:11,264 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2020-10-29 09:10:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:11,264 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-29 09:10:11,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-29 09:10:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:10:11,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:11,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:11,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:10:11,266 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:11,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:11,266 INFO L82 PathProgramCache]: Analyzing trace with hash -38373523, now seen corresponding path program 1 times [2020-10-29 09:10:11,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:11,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242089158] [2020-10-29 09:10:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:11,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-29 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:11,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:10:11,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:11,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:11,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:11,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:11,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:11,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:11,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:11,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:11,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:11,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:11,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:11,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242089158] [2020-10-29 09:10:11,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:11,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:11,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188014661] [2020-10-29 09:10:11,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:11,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:11,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:11,561 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-10-29 09:10:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:11,841 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-29 09:10:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:11,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-29 09:10:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:11,843 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:10:11,843 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:10:11,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:10:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-10-29 09:10:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:10:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-29 09:10:11,854 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 16 [2020-10-29 09:10:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:11,855 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-29 09:10:11,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-29 09:10:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:10:11,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:11,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:11,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:10:11,856 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash -575459649, now seen corresponding path program 1 times [2020-10-29 09:10:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:11,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556639615] [2020-10-29 09:10:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:11,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:10:12,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:12,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-29 09:10:12,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:12,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:10:12,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:10:12,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:12,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:12,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:12,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:10:12,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:12,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:12,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:12,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:12,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556639615] [2020-10-29 09:10:12,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:12,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:12,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221084011] [2020-10-29 09:10:12,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:12,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:12,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:12,142 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 5 states. [2020-10-29 09:10:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:12,435 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-29 09:10:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:12,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-29 09:10:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:12,436 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:10:12,436 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:10:12,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:10:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:10:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:10:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-29 09:10:12,454 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2020-10-29 09:10:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:12,455 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-29 09:10:12,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-29 09:10:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:10:12,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:12,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:12,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:10:12,458 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1021377268, now seen corresponding path program 1 times [2020-10-29 09:10:12,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:12,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620103332] [2020-10-29 09:10:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:10:12,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:12,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-29 09:10:12,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:10:12,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:12,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:12,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:12,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:10:12,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:12,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:12,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:12,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:10:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:12,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620103332] [2020-10-29 09:10:12,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:12,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:12,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683011773] [2020-10-29 09:10:12,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:12,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:12,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:12,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:12,779 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2020-10-29 09:10:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:12,943 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-29 09:10:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:12,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-29 09:10:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:12,945 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:10:12,945 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:10:12,945 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 [2020-10-29 09:10:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:10:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-29 09:10:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:10:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-29 09:10:12,953 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2020-10-29 09:10:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:12,953 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-29 09:10:12,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-29 09:10:12,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:10:12,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:12,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:12,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:10:12,955 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:12,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:12,955 INFO L82 PathProgramCache]: Analyzing trace with hash -605625927, now seen corresponding path program 1 times [2020-10-29 09:10:12,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:12,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461874077] [2020-10-29 09:10:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:13,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:10:13,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:13,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-29 09:10:13,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:13,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:13,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:13,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:13,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:10:13,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:13,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:13,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:13,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:13,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:13,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:13,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:13,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:13,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:13,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:13,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:13,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461874077] [2020-10-29 09:10:13,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:13,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:13,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96108061] [2020-10-29 09:10:13,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:13,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:13,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:13,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:13,390 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-10-29 09:10:13,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:13,679 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-29 09:10:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:13,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-29 09:10:13,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:13,681 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:10:13,681 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:10:13,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:10:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-29 09:10:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:10:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-29 09:10:13,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 20 [2020-10-29 09:10:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:13,699 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-29 09:10:13,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-29 09:10:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:10:13,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:13,704 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] [2020-10-29 09:10:13,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:10:13,705 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash 727972317, now seen corresponding path program 1 times [2020-10-29 09:10:13,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:13,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396868426] [2020-10-29 09:10:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:13,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:14,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:10:14,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-29 09:10:14,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:14,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:14,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:14,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:14,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:10:14,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:14,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:14,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:14,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:14,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:10:14,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:14,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:14,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:14,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:14,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:14,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396868426] [2020-10-29 09:10:14,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:14,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:10:14,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233376264] [2020-10-29 09:10:14,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:14,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:14,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:14,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:14,217 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2020-10-29 09:10:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:14,500 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-29 09:10:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:14,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:10:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:14,502 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:10:14,502 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:10:14,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:10:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:10:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:10:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-29 09:10:14,515 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2020-10-29 09:10:14,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:14,516 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-29 09:10:14,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-29 09:10:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:14,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:14,519 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:14,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:10:14,520 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:14,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1402037848, now seen corresponding path program 1 times [2020-10-29 09:10:14,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:14,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426166216] [2020-10-29 09:10:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:14,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:14,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:14,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:14,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-29 09:10:14,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:14,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:14,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:14,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:14,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:15,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:15,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:15,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:15,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:15,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:15,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:15,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:15,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:15,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:15,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:15,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426166216] [2020-10-29 09:10:15,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:15,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:15,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399305921] [2020-10-29 09:10:15,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:15,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:15,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:15,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:15,076 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-10-29 09:10:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:15,580 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-29 09:10:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:15,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-29 09:10:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:15,581 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:10:15,581 INFO L226 Difference]: Without dead ends: 72 [2020-10-29 09:10:15,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-29 09:10:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2020-10-29 09:10:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:10:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-29 09:10:15,596 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 27 [2020-10-29 09:10:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:15,600 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-29 09:10:15,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-29 09:10:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:15,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:15,602 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:15,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:10:15,604 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1203985706, now seen corresponding path program 1 times [2020-10-29 09:10:15,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:15,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646001861] [2020-10-29 09:10:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:15,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:15,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:15,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:15,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:15,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-29 09:10:15,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:15,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:15,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:15,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:15,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:15,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:16,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:16,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:16,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:16,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:16,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:10:16,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:16,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:16,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:16,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:16,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646001861] [2020-10-29 09:10:16,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:16,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:16,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199871822] [2020-10-29 09:10:16,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:16,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:16,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:16,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:16,131 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 8 states. [2020-10-29 09:10:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:16,640 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-29 09:10:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:16,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-29 09:10:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:16,641 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:10:16,642 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:10:16,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:10:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2020-10-29 09:10:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:10:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-29 09:10:16,648 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-10-29 09:10:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:16,648 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-29 09:10:16,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-29 09:10:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:16,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:16,650 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:16,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:10:16,650 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1358786164, now seen corresponding path program 1 times [2020-10-29 09:10:16,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:16,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407732857] [2020-10-29 09:10:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:16,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:17,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:17,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:17,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:17,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-29 09:10:17,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:17,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:17,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:17,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:17,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:10:17,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:17,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:17,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:17,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:17,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:17,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:17,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:17,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:17,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:17,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:17,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407732857] [2020-10-29 09:10:17,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:17,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:17,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547241049] [2020-10-29 09:10:17,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:17,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:17,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:17,940 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-29 09:10:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:18,386 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-29 09:10:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:18,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-29 09:10:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:18,388 INFO L225 Difference]: With dead ends: 81 [2020-10-29 09:10:18,388 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:10:18,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:18,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:10:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-29 09:10:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:10:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-29 09:10:18,398 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 31 [2020-10-29 09:10:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:18,398 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-29 09:10:18,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-29 09:10:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:18,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:18,400 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:18,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:10:18,402 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:18,403 INFO L82 PathProgramCache]: Analyzing trace with hash -446652170, now seen corresponding path program 1 times [2020-10-29 09:10:18,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:18,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636559099] [2020-10-29 09:10:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:18,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:19,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:19,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-29 09:10:19,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:19,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:19,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:10:19,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:19,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:20,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:20,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:20,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:20,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:20,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636559099] [2020-10-29 09:10:20,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:20,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:20,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506501845] [2020-10-29 09:10:20,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:20,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:20,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:20,023 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 8 states. [2020-10-29 09:10:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:20,666 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-10-29 09:10:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:20,667 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-29 09:10:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:20,668 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:10:20,668 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:10:20,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:10:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-29 09:10:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:10:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-10-29 09:10:20,676 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 31 [2020-10-29 09:10:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:20,677 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-10-29 09:10:20,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-10-29 09:10:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:10:20,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:20,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:20,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:10:20,679 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:20,680 INFO L82 PathProgramCache]: Analyzing trace with hash -695799998, now seen corresponding path program 1 times [2020-10-29 09:10:20,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:20,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887960040] [2020-10-29 09:10:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:10:20,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:20,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-29 09:10:20,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:20,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:20,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:10:20,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:21,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:21,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887960040] [2020-10-29 09:10:21,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:21,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:21,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047103892] [2020-10-29 09:10:21,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:21,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:21,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:21,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:21,366 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 9 states. [2020-10-29 09:10:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:22,090 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-10-29 09:10:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:22,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-29 09:10:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:22,092 INFO L225 Difference]: With dead ends: 103 [2020-10-29 09:10:22,092 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:10:22,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:10:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:10:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-29 09:10:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:10:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-29 09:10:22,100 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 34 [2020-10-29 09:10:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:22,101 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-29 09:10:22,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-29 09:10:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:10:22,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:22,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:22,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:10:22,102 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:22,103 INFO L82 PathProgramCache]: Analyzing trace with hash -633760384, now seen corresponding path program 1 times [2020-10-29 09:10:22,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:22,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251096394] [2020-10-29 09:10:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:22,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:22,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:10:22,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:22,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-29 09:10:22,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:22,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:22,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:22,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:22,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:10:22,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:22,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:22,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:22,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:22,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:22,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:22,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:22,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:22,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251096394] [2020-10-29 09:10:22,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:22,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:22,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824432101] [2020-10-29 09:10:22,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:22,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:22,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:22,827 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 9 states. [2020-10-29 09:10:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:23,802 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2020-10-29 09:10:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:23,803 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-29 09:10:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:23,804 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:10:23,804 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 09:10:23,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:10:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 09:10:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-29 09:10:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:10:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-29 09:10:23,823 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 34 [2020-10-29 09:10:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:23,823 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-29 09:10:23,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-29 09:10:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:10:23,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:23,824 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:23,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:10:23,825 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1293216844, now seen corresponding path program 2 times [2020-10-29 09:10:23,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:23,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285937938] [2020-10-29 09:10:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:24,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:10:24,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:24,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-29 09:10:24,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:24,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:10:24,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:24,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:24,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:24,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:24,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:24,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:10:24,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:24,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:24,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:24,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:24,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:24,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:24,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285937938] [2020-10-29 09:10:24,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:24,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:24,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857998936] [2020-10-29 09:10:24,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:24,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:24,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:24,957 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 9 states. [2020-10-29 09:10:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:25,474 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2020-10-29 09:10:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:25,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-29 09:10:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:25,477 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:10:25,477 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:10:25,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:10:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-29 09:10:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 09:10:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-29 09:10:25,487 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 37 [2020-10-29 09:10:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:25,487 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-29 09:10:25,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-29 09:10:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:10:25,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:25,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:25,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:10:25,489 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2057975726, now seen corresponding path program 1 times [2020-10-29 09:10:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:25,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890264965] [2020-10-29 09:10:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:25,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:10:25,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:25,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-29 09:10:25,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:25,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:25,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:10:25,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:26,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:26,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:26,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:26,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:26,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:26,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:26,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:26,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890264965] [2020-10-29 09:10:26,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:26,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:26,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219528368] [2020-10-29 09:10:26,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:26,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:26,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:26,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:26,189 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 10 states. [2020-10-29 09:10:26,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:26,987 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-29 09:10:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:26,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-29 09:10:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:26,989 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:10:26,989 INFO L226 Difference]: Without dead ends: 108 [2020-10-29 09:10:26,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:10:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-29 09:10:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-29 09:10:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:10:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-10-29 09:10:26,997 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 37 [2020-10-29 09:10:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:26,998 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-10-29 09:10:26,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-10-29 09:10:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:10:26,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:26,999 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:26,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:10:26,999 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:27,000 INFO L82 PathProgramCache]: Analyzing trace with hash 92986550, now seen corresponding path program 2 times [2020-10-29 09:10:27,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:27,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967280896] [2020-10-29 09:10:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:27,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:28,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:10:28,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:28,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-29 09:10:28,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:28,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:28,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:28,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:28,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:10:28,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:28,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:28,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:28,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:28,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:28,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:10:28,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:28,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:28,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:28,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:28,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:28,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:28,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967280896] [2020-10-29 09:10:28,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:28,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:28,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028008483] [2020-10-29 09:10:28,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:28,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:28,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:28,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:28,748 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 9 states. [2020-10-29 09:10:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:29,440 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2020-10-29 09:10:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:29,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-29 09:10:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:29,442 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:10:29,443 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:10:29,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:10:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-10-29 09:10:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:10:29,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2020-10-29 09:10:29,457 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 37 [2020-10-29 09:10:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:29,457 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2020-10-29 09:10:29,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2020-10-29 09:10:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:10:29,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:29,458 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, 1, 1, 1, 1] [2020-10-29 09:10:29,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:10:29,459 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:29,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1270767963, now seen corresponding path program 1 times [2020-10-29 09:10:29,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:29,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319601570] [2020-10-29 09:10:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:29,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:30,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:10:30,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:30,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1443 [2020-10-29 09:10:30,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:30,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:10:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:31,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:31,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:31,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:31,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:31,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:31,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:31,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:31,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:10:31,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319601570] [2020-10-29 09:10:31,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:31,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:31,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508377212] [2020-10-29 09:10:31,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:31,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:31,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:31,088 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand 8 states. [2020-10-29 09:10:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:31,537 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2020-10-29 09:10:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:31,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-29 09:10:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:31,539 INFO L225 Difference]: With dead ends: 109 [2020-10-29 09:10:31,539 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:10:31,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:10:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2020-10-29 09:10:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-29 09:10:31,549 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 42 [2020-10-29 09:10:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:31,549 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-29 09:10:31,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-29 09:10:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:10:31,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:31,550 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:31,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:10:31,550 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:31,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1595693590, now seen corresponding path program 1 times [2020-10-29 09:10:31,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:31,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762559955] [2020-10-29 09:10:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:10:32,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1369 [2020-10-29 09:10:32,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:10:32,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:33,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:33,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:33,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:33,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:33,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762559955] [2020-10-29 09:10:33,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:33,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:33,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071274174] [2020-10-29 09:10:33,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:33,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:33,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:33,180 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 10 states. [2020-10-29 09:10:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:34,123 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2020-10-29 09:10:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:34,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-29 09:10:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:34,125 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:10:34,125 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:10:34,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:10:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:10:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-29 09:10:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:10:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-10-29 09:10:34,144 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 42 [2020-10-29 09:10:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:34,144 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-10-29 09:10:34,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-10-29 09:10:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:10:34,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:34,146 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1] [2020-10-29 09:10:34,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:10:34,146 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:34,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1316952253, now seen corresponding path program 3 times [2020-10-29 09:10:34,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:34,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255387719] [2020-10-29 09:10:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:10:35,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:35,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-29 09:10:35,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:10:35,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:35,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:35,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:35,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:35,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255387719] [2020-10-29 09:10:35,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:35,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:35,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785125709] [2020-10-29 09:10:35,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:35,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:35,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:35,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:35,517 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 11 states. [2020-10-29 09:10:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:36,484 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-29 09:10:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:36,484 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-29 09:10:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:36,485 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:10:36,485 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:10:36,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:10:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:10:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2020-10-29 09:10:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:10:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-29 09:10:36,497 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 45 [2020-10-29 09:10:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:36,497 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-29 09:10:36,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-29 09:10:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:10:36,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:36,498 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:36,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:10:36,498 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:36,499 INFO L82 PathProgramCache]: Analyzing trace with hash -771970409, now seen corresponding path program 1 times [2020-10-29 09:10:36,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:36,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059073868] [2020-10-29 09:10:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:38,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:10:38,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:38,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2098 [2020-10-29 09:10:38,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:38,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:10:38,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:38,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:38,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:38,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:38,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:38,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:38,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:38,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:38,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:38,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:38,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059073868] [2020-10-29 09:10:38,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:38,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:38,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459306965] [2020-10-29 09:10:38,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:38,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:38,935 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 9 states. [2020-10-29 09:10:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:39,315 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-29 09:10:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:39,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-29 09:10:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:39,317 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:10:39,317 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:10:39,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:10:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-29 09:10:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:10:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-29 09:10:39,326 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 45 [2020-10-29 09:10:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:39,326 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-29 09:10:39,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-29 09:10:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:10:39,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:39,327 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1] [2020-10-29 09:10:39,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:10:39,328 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1378991867, now seen corresponding path program 1 times [2020-10-29 09:10:39,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:39,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084670923] [2020-10-29 09:10:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:39,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:40,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:10:40,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:40,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1374 [2020-10-29 09:10:40,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:40,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:10:40,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:41,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:41,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:41,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:41,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:41,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084670923] [2020-10-29 09:10:41,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:41,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:41,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430585145] [2020-10-29 09:10:41,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:41,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:41,303 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 11 states. [2020-10-29 09:10:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:42,622 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2020-10-29 09:10:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:10:42,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-29 09:10:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:42,624 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:10:42,625 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:10:42,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:10:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:10:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2020-10-29 09:10:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:10:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-29 09:10:42,635 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 45 [2020-10-29 09:10:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:42,636 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-29 09:10:42,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-29 09:10:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:10:42,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:42,636 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1] [2020-10-29 09:10:42,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:10:42,637 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1976483775, now seen corresponding path program 2 times [2020-10-29 09:10:42,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:42,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775091909] [2020-10-29 09:10:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:42,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:43,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:10:43,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:43,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-29 09:10:43,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:43,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:43,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:43,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:43,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:10:43,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:43,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:43,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:43,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:43,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:43,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:43,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:43,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:43,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:43,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:43,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:43,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:43,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775091909] [2020-10-29 09:10:43,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:43,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:43,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54128541] [2020-10-29 09:10:43,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:43,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:43,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:43,613 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 11 states. [2020-10-29 09:10:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:44,558 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2020-10-29 09:10:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:44,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-29 09:10:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:44,559 INFO L225 Difference]: With dead ends: 111 [2020-10-29 09:10:44,560 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:10:44,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:10:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:10:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2020-10-29 09:10:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 09:10:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-10-29 09:10:44,569 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 45 [2020-10-29 09:10:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:44,570 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-10-29 09:10:44,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-10-29 09:10:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:10:44,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:44,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1] [2020-10-29 09:10:44,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:10:44,571 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1429326759, now seen corresponding path program 4 times [2020-10-29 09:10:44,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:44,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802864972] [2020-10-29 09:10:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:44,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:45,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:10:45,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:45,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-29 09:10:45,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:45,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:45,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:45,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:45,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:10:45,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:45,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:45,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:45,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:45,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:45,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:45,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:45,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:45,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802864972] [2020-10-29 09:10:45,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:45,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:45,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178626099] [2020-10-29 09:10:45,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:45,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:45,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:45,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:45,577 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 11 states. [2020-10-29 09:10:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:46,729 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2020-10-29 09:10:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:10:46,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-29 09:10:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:46,730 INFO L225 Difference]: With dead ends: 135 [2020-10-29 09:10:46,730 INFO L226 Difference]: Without dead ends: 122 [2020-10-29 09:10:46,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:10:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-29 09:10:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-29 09:10:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 09:10:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2020-10-29 09:10:46,741 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 48 [2020-10-29 09:10:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:46,742 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2020-10-29 09:10:46,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2020-10-29 09:10:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:10:46,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:46,743 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1] [2020-10-29 09:10:46,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:10:46,743 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:46,744 INFO L82 PathProgramCache]: Analyzing trace with hash -43123365, now seen corresponding path program 3 times [2020-10-29 09:10:46,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:46,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010675146] [2020-10-29 09:10:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:46,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:47,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:10:47,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:47,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-29 09:10:47,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:47,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:10:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:47,734 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-10-29 09:10:47,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:47,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:47,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:47,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:47,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:47,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:47,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:47,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:48,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010675146] [2020-10-29 09:10:48,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:48,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:48,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142101144] [2020-10-29 09:10:48,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:48,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:48,039 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 11 states. [2020-10-29 09:10:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:49,472 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2020-10-29 09:10:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:10:49,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-29 09:10:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:49,473 INFO L225 Difference]: With dead ends: 151 [2020-10-29 09:10:49,473 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 09:10:49,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:10:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 09:10:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 109. [2020-10-29 09:10:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 09:10:49,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2020-10-29 09:10:49,485 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 48 [2020-10-29 09:10:49,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:49,486 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2020-10-29 09:10:49,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:49,486 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2020-10-29 09:10:49,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:10:49,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:49,487 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:49,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:10:49,487 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:49,488 INFO L82 PathProgramCache]: Analyzing trace with hash -657129037, now seen corresponding path program 1 times [2020-10-29 09:10:49,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:49,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039078262] [2020-10-29 09:10:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:49,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:50,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:10:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:50,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-29 09:10:50,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:50,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:10:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:50,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:50,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:50,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:50,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:50,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:50,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:50,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:50,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:50,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:50,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:50,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:50,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:50,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039078262] [2020-10-29 09:10:50,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:50,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:10:50,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355366459] [2020-10-29 09:10:50,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:10:50,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:10:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:50,553 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand 12 states. [2020-10-29 09:10:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:51,904 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-10-29 09:10:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:10:51,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 09:10:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:51,906 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:10:51,906 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:10:51,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:10:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:10:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2020-10-29 09:10:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-29 09:10:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2020-10-29 09:10:51,918 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 48 [2020-10-29 09:10:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:51,919 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2020-10-29 09:10:51,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:10:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2020-10-29 09:10:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:10:51,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:51,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1] [2020-10-29 09:10:51,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:10:51,920 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1493833239, now seen corresponding path program 4 times [2020-10-29 09:10:51,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:51,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030851065] [2020-10-29 09:10:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:51,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:54,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:10:54,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2688 [2020-10-29 09:10:54,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:54,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:10:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:54,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:54,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:54,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:54,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:54,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:54,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:54,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:54,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:54,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030851065] [2020-10-29 09:10:54,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:54,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:54,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316577128] [2020-10-29 09:10:54,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:54,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:54,953 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand 11 states. [2020-10-29 09:10:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:55,842 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2020-10-29 09:10:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:55,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-29 09:10:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:55,844 INFO L225 Difference]: With dead ends: 181 [2020-10-29 09:10:55,844 INFO L226 Difference]: Without dead ends: 168 [2020-10-29 09:10:55,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:10:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-29 09:10:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 157. [2020-10-29 09:10:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:10:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2020-10-29 09:10:55,858 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 48 [2020-10-29 09:10:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:55,859 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2020-10-29 09:10:55,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2020-10-29 09:10:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:10:55,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:55,866 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:55,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:10:55,867 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash 729074357, now seen corresponding path program 2 times [2020-10-29 09:10:55,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:55,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665135318] [2020-10-29 09:10:55,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:55,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:56,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:56,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:10:56,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-29 09:10:56,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:56,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:10:56,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:57,032 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-29 09:10:57,155 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-29 09:10:57,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:57,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:57,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:57,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:57,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:57,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:57,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:57,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:57,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:57,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:57,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:57,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665135318] [2020-10-29 09:10:57,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:57,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:10:57,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222583666] [2020-10-29 09:10:57,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:10:57,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:57,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:10:57,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:57,326 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand 12 states. [2020-10-29 09:10:58,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:58,609 INFO L93 Difference]: Finished difference Result 199 states and 217 transitions. [2020-10-29 09:10:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:10:58,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 09:10:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:58,617 INFO L225 Difference]: With dead ends: 199 [2020-10-29 09:10:58,617 INFO L226 Difference]: Without dead ends: 195 [2020-10-29 09:10:58,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:10:58,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-29 09:10:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 157. [2020-10-29 09:10:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:10:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2020-10-29 09:10:58,632 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 48 [2020-10-29 09:10:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:58,632 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2020-10-29 09:10:58,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:10:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2020-10-29 09:10:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:10:58,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:58,634 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 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, 1] [2020-10-29 09:10:58,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:10:58,635 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:58,635 INFO L82 PathProgramCache]: Analyzing trace with hash -995351747, now seen corresponding path program 5 times [2020-10-29 09:10:58,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:58,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845420891] [2020-10-29 09:10:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:58,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:59,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:59,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:10:59,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:59,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-29 09:10:59,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:59,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:59,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:59,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:59,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:10:59,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:59,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:59,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:59,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:59,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:59,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:59,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:59,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:59,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845420891] [2020-10-29 09:10:59,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:59,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:59,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422227987] [2020-10-29 09:10:59,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:59,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:59,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:59,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:59,723 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand 11 states. [2020-10-29 09:11:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:00,644 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-10-29 09:11:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:00,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-29 09:11:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:00,646 INFO L225 Difference]: With dead ends: 172 [2020-10-29 09:11:00,647 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:11:00,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:11:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:11:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-29 09:11:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-29 09:11:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2020-10-29 09:11:00,657 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 51 [2020-10-29 09:11:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:00,657 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2020-10-29 09:11:00,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2020-10-29 09:11:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:11:00,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:00,659 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:00,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:11:00,659 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:00,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1423412887, now seen corresponding path program 2 times [2020-10-29 09:11:00,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:00,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523886695] [2020-10-29 09:11:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:00,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:01,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:01,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:11:01,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:01,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-29 09:11:01,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:01,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:11:01,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:01,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:01,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:01,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:01,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:01,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:01,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:01,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:01,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:01,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:01,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:01,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523886695] [2020-10-29 09:11:01,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:01,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210578491] [2020-10-29 09:11:01,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:01,748 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand 12 states. [2020-10-29 09:11:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:03,018 INFO L93 Difference]: Finished difference Result 171 states and 188 transitions. [2020-10-29 09:11:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:11:03,019 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-29 09:11:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:03,020 INFO L225 Difference]: With dead ends: 171 [2020-10-29 09:11:03,020 INFO L226 Difference]: Without dead ends: 167 [2020-10-29 09:11:03,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-29 09:11:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2020-10-29 09:11:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 09:11:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 161 transitions. [2020-10-29 09:11:03,034 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 161 transitions. Word has length 51 [2020-10-29 09:11:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:03,034 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 161 transitions. [2020-10-29 09:11:03,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 161 transitions. [2020-10-29 09:11:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:11:03,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:03,036 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1] [2020-10-29 09:11:03,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:11:03,036 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:03,036 INFO L82 PathProgramCache]: Analyzing trace with hash -720592133, now seen corresponding path program 5 times [2020-10-29 09:11:03,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:03,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196368916] [2020-10-29 09:11:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:03,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:04,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:11:04,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:04,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1834 [2020-10-29 09:11:04,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:04,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:04,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:04,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:04,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:11:04,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:05,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:05,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:05,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196368916] [2020-10-29 09:11:05,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:05,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:05,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891146069] [2020-10-29 09:11:05,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:05,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:05,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:05,280 INFO L87 Difference]: Start difference. First operand 148 states and 161 transitions. Second operand 11 states. [2020-10-29 09:11:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:06,254 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2020-10-29 09:11:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:06,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-29 09:11:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:06,257 INFO L225 Difference]: With dead ends: 175 [2020-10-29 09:11:06,257 INFO L226 Difference]: Without dead ends: 162 [2020-10-29 09:11:06,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:06,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-29 09:11:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 143. [2020-10-29 09:11:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-29 09:11:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2020-10-29 09:11:06,269 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 51 [2020-10-29 09:11:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:06,269 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2020-10-29 09:11:06,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2020-10-29 09:11:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:11:06,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:06,270 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:06,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:11:06,271 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1287574869, now seen corresponding path program 1 times [2020-10-29 09:11:06,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:06,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151311823] [2020-10-29 09:11:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:06,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:06,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:06,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:11:06,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-29 09:11:06,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:06,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:11:06,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:07,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:07,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:07,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:07,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:07,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:07,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:07,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:07,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:07,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151311823] [2020-10-29 09:11:07,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:07,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:07,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852892249] [2020-10-29 09:11:07,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:07,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:07,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:07,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:07,610 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand 13 states. [2020-10-29 09:11:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:09,257 INFO L93 Difference]: Finished difference Result 242 states and 268 transitions. [2020-10-29 09:11:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:11:09,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-29 09:11:09,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:09,260 INFO L225 Difference]: With dead ends: 242 [2020-10-29 09:11:09,261 INFO L226 Difference]: Without dead ends: 229 [2020-10-29 09:11:09,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:11:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-29 09:11:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 201. [2020-10-29 09:11:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-29 09:11:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 219 transitions. [2020-10-29 09:11:09,276 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 219 transitions. Word has length 53 [2020-10-29 09:11:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:09,277 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 219 transitions. [2020-10-29 09:11:09,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 219 transitions. [2020-10-29 09:11:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:11:09,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:09,278 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:09,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:11:09,278 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:09,279 INFO L82 PathProgramCache]: Analyzing trace with hash -956408429, now seen corresponding path program 2 times [2020-10-29 09:11:09,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:09,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410919411] [2020-10-29 09:11:09,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:09,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:11:10,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-29 09:11:10,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:10,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:10,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:11:10,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:10,684 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 09:11:10,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:10,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:10,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:10,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:10,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410919411] [2020-10-29 09:11:10,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:10,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:10,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144011009] [2020-10-29 09:11:10,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:10,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:10,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:10,875 INFO L87 Difference]: Start difference. First operand 201 states and 219 transitions. Second operand 13 states. [2020-10-29 09:11:13,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:13,095 INFO L93 Difference]: Finished difference Result 306 states and 342 transitions. [2020-10-29 09:11:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:11:13,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-29 09:11:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:13,098 INFO L225 Difference]: With dead ends: 306 [2020-10-29 09:11:13,098 INFO L226 Difference]: Without dead ends: 302 [2020-10-29 09:11:13,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:11:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-29 09:11:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 239. [2020-10-29 09:11:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-29 09:11:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 261 transitions. [2020-10-29 09:11:13,117 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 261 transitions. Word has length 53 [2020-10-29 09:11:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:13,118 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 261 transitions. [2020-10-29 09:11:13,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 261 transitions. [2020-10-29 09:11:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:11:13,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:13,119 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:13,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:11:13,119 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1837414129, now seen corresponding path program 2 times [2020-10-29 09:11:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:13,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188486121] [2020-10-29 09:11:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:13,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:14,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:11:14,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:14,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-29 09:11:14,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:14,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:11:14,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:14,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:14,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:14,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:14,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:14,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:14,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:14,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:14,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188486121] [2020-10-29 09:11:14,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:14,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:14,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111208326] [2020-10-29 09:11:14,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:14,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:14,788 INFO L87 Difference]: Start difference. First operand 239 states and 261 transitions. Second operand 12 states. [2020-10-29 09:11:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:16,260 INFO L93 Difference]: Finished difference Result 255 states and 279 transitions. [2020-10-29 09:11:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:16,261 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-29 09:11:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:16,262 INFO L225 Difference]: With dead ends: 255 [2020-10-29 09:11:16,262 INFO L226 Difference]: Without dead ends: 221 [2020-10-29 09:11:16,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:16,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-29 09:11:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-10-29 09:11:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-29 09:11:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 242 transitions. [2020-10-29 09:11:16,278 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 242 transitions. Word has length 56 [2020-10-29 09:11:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:16,279 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 242 transitions. [2020-10-29 09:11:16,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 242 transitions. [2020-10-29 09:11:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:11:16,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:16,280 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:16,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:11:16,280 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash -437645119, now seen corresponding path program 3 times [2020-10-29 09:11:16,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:16,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052382851] [2020-10-29 09:11:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:16,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:17,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:11:17,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1034 [2020-10-29 09:11:17,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:17,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:11:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:17,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:17,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:17,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:17,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:17,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:17,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:17,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:17,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:17,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052382851] [2020-10-29 09:11:17,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:17,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:17,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628351400] [2020-10-29 09:11:17,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:17,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:17,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:17,992 INFO L87 Difference]: Start difference. First operand 221 states and 242 transitions. Second operand 13 states. [2020-10-29 09:11:19,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:19,510 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2020-10-29 09:11:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:19,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-29 09:11:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:19,513 INFO L225 Difference]: With dead ends: 243 [2020-10-29 09:11:19,513 INFO L226 Difference]: Without dead ends: 208 [2020-10-29 09:11:19,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:11:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-29 09:11:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 202. [2020-10-29 09:11:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-29 09:11:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 220 transitions. [2020-10-29 09:11:19,528 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 220 transitions. Word has length 56 [2020-10-29 09:11:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:19,528 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 220 transitions. [2020-10-29 09:11:19,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 220 transitions. [2020-10-29 09:11:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:11:19,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:19,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2020-10-29 09:11:19,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:11:19,530 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:19,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:19,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1929075873, now seen corresponding path program 1 times [2020-10-29 09:11:19,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:19,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504591747] [2020-10-29 09:11:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:11:20,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:20,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:20,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:20,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:20,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:20,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:20,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:20,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:20,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:20,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:20,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:20,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:21,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504591747] [2020-10-29 09:11:21,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:21,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:21,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197823572] [2020-10-29 09:11:21,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:21,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:21,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:21,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:21,002 INFO L87 Difference]: Start difference. First operand 202 states and 220 transitions. Second operand 14 states. [2020-10-29 09:11:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:23,288 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2020-10-29 09:11:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:11:23,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-29 09:11:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:23,291 INFO L225 Difference]: With dead ends: 241 [2020-10-29 09:11:23,291 INFO L226 Difference]: Without dead ends: 230 [2020-10-29 09:11:23,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:11:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-29 09:11:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2020-10-29 09:11:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-29 09:11:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 224 transitions. [2020-10-29 09:11:23,310 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 224 transitions. Word has length 56 [2020-10-29 09:11:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:23,310 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 224 transitions. [2020-10-29 09:11:23,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 224 transitions. [2020-10-29 09:11:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:11:23,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:23,311 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2020-10-29 09:11:23,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:11:23,312 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:23,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:23,312 INFO L82 PathProgramCache]: Analyzing trace with hash 221886403, now seen corresponding path program 3 times [2020-10-29 09:11:23,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:23,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009547778] [2020-10-29 09:11:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:23,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:25,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:11:25,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:25,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2270 [2020-10-29 09:11:25,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:25,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:11:25,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:26,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:26,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:26,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:26,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:26,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:26,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:26,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:26,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:26,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:26,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:26,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:26,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009547778] [2020-10-29 09:11:26,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:26,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:26,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903366751] [2020-10-29 09:11:26,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:26,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:26,196 INFO L87 Difference]: Start difference. First operand 206 states and 224 transitions. Second operand 13 states. [2020-10-29 09:11:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:27,856 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2020-10-29 09:11:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:27,857 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-29 09:11:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:27,859 INFO L225 Difference]: With dead ends: 238 [2020-10-29 09:11:27,859 INFO L226 Difference]: Without dead ends: 225 [2020-10-29 09:11:27,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:11:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-29 09:11:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2020-10-29 09:11:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-29 09:11:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 223 transitions. [2020-10-29 09:11:27,876 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 223 transitions. Word has length 56 [2020-10-29 09:11:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:27,876 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 223 transitions. [2020-10-29 09:11:27,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 223 transitions. [2020-10-29 09:11:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:11:27,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:27,877 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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, 1] [2020-10-29 09:11:27,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:11:27,877 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:27,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1593731536, now seen corresponding path program 1 times [2020-10-29 09:11:27,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:27,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468833446] [2020-10-29 09:11:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:27,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:28,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:28,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:28,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:11:28,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:28,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-29 09:11:28,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:28,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:28,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:28,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:28,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:11:28,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:29,212 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2020-10-29 09:11:29,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:29,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:29,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:29,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:29,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:29,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:29,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:29,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:29,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:29,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:29,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:29,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:29,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468833446] [2020-10-29 09:11:29,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:29,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:29,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169720117] [2020-10-29 09:11:29,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:29,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:29,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:29,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:29,518 INFO L87 Difference]: Start difference. First operand 206 states and 223 transitions. Second operand 12 states. [2020-10-29 09:11:30,271 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-29 09:11:30,465 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-29 09:11:30,819 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-29 09:11:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:31,546 INFO L93 Difference]: Finished difference Result 210 states and 226 transitions. [2020-10-29 09:11:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:11:31,546 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-29 09:11:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:31,548 INFO L225 Difference]: With dead ends: 210 [2020-10-29 09:11:31,548 INFO L226 Difference]: Without dead ends: 191 [2020-10-29 09:11:31,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:11:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-29 09:11:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 181. [2020-10-29 09:11:31,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-29 09:11:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 197 transitions. [2020-10-29 09:11:31,573 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 197 transitions. Word has length 59 [2020-10-29 09:11:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:31,573 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 197 transitions. [2020-10-29 09:11:31,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 197 transitions. [2020-10-29 09:11:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:11:31,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:31,574 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 09:11:31,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:11:31,575 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:31,575 INFO L82 PathProgramCache]: Analyzing trace with hash -207528142, now seen corresponding path program 3 times [2020-10-29 09:11:31,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:31,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834843077] [2020-10-29 09:11:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:32,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:32,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:32,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:11:32,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:32,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-29 09:11:32,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:32,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:11:32,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:33,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:33,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:33,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:33,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:33,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:33,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:33,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:33,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:33,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:33,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:33,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:33,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834843077] [2020-10-29 09:11:33,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:33,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362976409] [2020-10-29 09:11:33,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:33,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:33,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:33,569 INFO L87 Difference]: Start difference. First operand 181 states and 197 transitions. Second operand 12 states. [2020-10-29 09:11:34,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:34,693 INFO L93 Difference]: Finished difference Result 221 states and 242 transitions. [2020-10-29 09:11:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:34,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-29 09:11:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:34,696 INFO L225 Difference]: With dead ends: 221 [2020-10-29 09:11:34,696 INFO L226 Difference]: Without dead ends: 195 [2020-10-29 09:11:34,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:11:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-29 09:11:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 177. [2020-10-29 09:11:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-29 09:11:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 190 transitions. [2020-10-29 09:11:34,714 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 190 transitions. Word has length 59 [2020-10-29 09:11:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:34,715 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 190 transitions. [2020-10-29 09:11:34,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 190 transitions. [2020-10-29 09:11:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:11:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:34,716 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1] [2020-10-29 09:11:34,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:11:34,716 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1943434134, now seen corresponding path program 6 times [2020-10-29 09:11:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:34,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319072866] [2020-10-29 09:11:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:34,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1073 [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:11:35,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:36,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:36,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:36,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:36,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:36,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:36,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:36,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:36,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:36,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319072866] [2020-10-29 09:11:36,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:36,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989454779] [2020-10-29 09:11:36,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:36,265 INFO L87 Difference]: Start difference. First operand 177 states and 190 transitions. Second operand 12 states. [2020-10-29 09:11:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:37,796 INFO L93 Difference]: Finished difference Result 200 states and 219 transitions. [2020-10-29 09:11:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:37,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-29 09:11:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:37,798 INFO L225 Difference]: With dead ends: 200 [2020-10-29 09:11:37,798 INFO L226 Difference]: Without dead ends: 196 [2020-10-29 09:11:37,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-29 09:11:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2020-10-29 09:11:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-29 09:11:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 190 transitions. [2020-10-29 09:11:37,813 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 190 transitions. Word has length 59 [2020-10-29 09:11:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:37,813 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 190 transitions. [2020-10-29 09:11:37,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 190 transitions. [2020-10-29 09:11:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:11:37,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:37,814 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1] [2020-10-29 09:11:37,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:11:37,815 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash -814576558, now seen corresponding path program 7 times [2020-10-29 09:11:37,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:37,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330501363] [2020-10-29 09:11:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:37,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:38,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:38,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:11:38,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-10-29 09:11:38,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:38,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:11:38,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:39,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:39,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:39,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:39,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:39,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:39,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:39,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:39,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330501363] [2020-10-29 09:11:39,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:39,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:39,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361155171] [2020-10-29 09:11:39,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:39,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:39,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:39,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:39,109 INFO L87 Difference]: Start difference. First operand 177 states and 190 transitions. Second operand 13 states. [2020-10-29 09:11:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:40,545 INFO L93 Difference]: Finished difference Result 200 states and 217 transitions. [2020-10-29 09:11:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:40,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-29 09:11:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:40,548 INFO L225 Difference]: With dead ends: 200 [2020-10-29 09:11:40,548 INFO L226 Difference]: Without dead ends: 196 [2020-10-29 09:11:40,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:11:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-29 09:11:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 180. [2020-10-29 09:11:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:11:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-10-29 09:11:40,561 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 59 [2020-10-29 09:11:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:40,561 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-10-29 09:11:40,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-10-29 09:11:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:11:40,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:40,562 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 09:11:40,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:11:40,562 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash 672649650, now seen corresponding path program 4 times [2020-10-29 09:11:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:40,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360439167] [2020-10-29 09:11:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:40,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:41,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:11:41,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:41,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:41,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:41,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:41,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:41,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360439167] [2020-10-29 09:11:41,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:41,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:41,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803711499] [2020-10-29 09:11:41,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:41,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:41,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:41,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:41,886 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 13 states. [2020-10-29 09:11:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:43,667 INFO L93 Difference]: Finished difference Result 207 states and 224 transitions. [2020-10-29 09:11:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:11:43,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-29 09:11:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:43,669 INFO L225 Difference]: With dead ends: 207 [2020-10-29 09:11:43,670 INFO L226 Difference]: Without dead ends: 203 [2020-10-29 09:11:43,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:11:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-29 09:11:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 177. [2020-10-29 09:11:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-29 09:11:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 191 transitions. [2020-10-29 09:11:43,686 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 191 transitions. Word has length 59 [2020-10-29 09:11:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:43,686 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 191 transitions. [2020-10-29 09:11:43,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 191 transitions. [2020-10-29 09:11:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:11:43,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:43,687 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1] [2020-10-29 09:11:43,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:11:43,688 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1079156951, now seen corresponding path program 4 times [2020-10-29 09:11:43,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:43,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729309930] [2020-10-29 09:11:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:43,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:46,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:11:46,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:46,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-29 09:11:46,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:46,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:46,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:46,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:46,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:11:46,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:47,022 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 09:11:47,153 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-29 09:11:47,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:47,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:47,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:47,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:47,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:47,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:47,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:47,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:47,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:47,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:47,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:47,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729309930] [2020-10-29 09:11:47,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:47,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:47,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211795458] [2020-10-29 09:11:47,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:47,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:47,657 INFO L87 Difference]: Start difference. First operand 177 states and 191 transitions. Second operand 14 states. [2020-10-29 09:11:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:50,253 INFO L93 Difference]: Finished difference Result 213 states and 234 transitions. [2020-10-29 09:11:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:50,254 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-29 09:11:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:50,256 INFO L225 Difference]: With dead ends: 213 [2020-10-29 09:11:50,256 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 09:11:50,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:11:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 09:11:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2020-10-29 09:11:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-29 09:11:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-10-29 09:11:50,269 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 61 [2020-10-29 09:11:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:50,269 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-10-29 09:11:50,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-10-29 09:11:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:11:50,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:50,270 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:50,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:11:50,270 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:50,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1691473284, now seen corresponding path program 5 times [2020-10-29 09:11:50,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:50,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835113031] [2020-10-29 09:11:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:11:51,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:52,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:52,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835113031] [2020-10-29 09:11:52,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:52,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:52,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548932393] [2020-10-29 09:11:52,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:52,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:52,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:52,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:52,061 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-10-29 09:11:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:53,410 INFO L93 Difference]: Finished difference Result 187 states and 201 transitions. [2020-10-29 09:11:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:11:53,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-29 09:11:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:53,412 INFO L225 Difference]: With dead ends: 187 [2020-10-29 09:11:53,412 INFO L226 Difference]: Without dead ends: 159 [2020-10-29 09:11:53,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-29 09:11:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2020-10-29 09:11:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:11:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2020-10-29 09:11:53,423 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 62 [2020-10-29 09:11:53,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:53,423 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2020-10-29 09:11:53,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2020-10-29 09:11:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:11:53,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:53,424 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:53,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:11:53,425 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1431341120, now seen corresponding path program 6 times [2020-10-29 09:11:53,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:53,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621347929] [2020-10-29 09:11:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:53,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:54,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:54,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:11:54,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:54,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-29 09:11:54,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:54,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:11:54,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:54,669 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-29 09:11:54,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:54,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:54,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:54,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:54,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:54,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:54,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:54,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:54,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:54,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:54,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:54,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:54,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621347929] [2020-10-29 09:11:54,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:54,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:54,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022643121] [2020-10-29 09:11:54,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:54,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:54,983 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 14 states. [2020-10-29 09:11:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:57,322 INFO L93 Difference]: Finished difference Result 205 states and 223 transitions. [2020-10-29 09:11:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:11:57,323 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-29 09:11:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:57,324 INFO L225 Difference]: With dead ends: 205 [2020-10-29 09:11:57,324 INFO L226 Difference]: Without dead ends: 201 [2020-10-29 09:11:57,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:11:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-29 09:11:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 162. [2020-10-29 09:11:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-29 09:11:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 176 transitions. [2020-10-29 09:11:57,336 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 176 transitions. Word has length 62 [2020-10-29 09:11:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:57,337 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 176 transitions. [2020-10-29 09:11:57,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 176 transitions. [2020-10-29 09:11:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:11:57,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:57,338 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:57,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:11:57,338 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash -712663900, now seen corresponding path program 8 times [2020-10-29 09:11:57,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:57,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122167161] [2020-10-29 09:11:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:57,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:58,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:58,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2842 [2020-10-29 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:00,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:12:00,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:00,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:00,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:00,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:00,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:00,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:00,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:00,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:00,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:00,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:00,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:00,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:00,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:00,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122167161] [2020-10-29 09:12:00,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:00,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:00,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355633192] [2020-10-29 09:12:00,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:00,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:00,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:00,650 INFO L87 Difference]: Start difference. First operand 162 states and 176 transitions. Second operand 13 states. [2020-10-29 09:12:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:02,094 INFO L93 Difference]: Finished difference Result 215 states and 237 transitions. [2020-10-29 09:12:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:02,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-29 09:12:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:02,095 INFO L225 Difference]: With dead ends: 215 [2020-10-29 09:12:02,096 INFO L226 Difference]: Without dead ends: 202 [2020-10-29 09:12:02,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-29 09:12:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 182. [2020-10-29 09:12:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-29 09:12:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 197 transitions. [2020-10-29 09:12:02,107 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 197 transitions. Word has length 62 [2020-10-29 09:12:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:02,107 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 197 transitions. [2020-10-29 09:12:02,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 197 transitions. [2020-10-29 09:12:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:12:02,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:02,108 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:02,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:12:02,108 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1706100734, now seen corresponding path program 7 times [2020-10-29 09:12:02,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:02,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715476735] [2020-10-29 09:12:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:02,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:03,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:12:03,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-29 09:12:03,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:03,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:12:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:03,789 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:12:04,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:04,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:04,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:04,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:04,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:04,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:04,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:04,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:04,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:04,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715476735] [2020-10-29 09:12:04,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:04,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:04,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759105459] [2020-10-29 09:12:04,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:04,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:04,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:04,132 INFO L87 Difference]: Start difference. First operand 182 states and 197 transitions. Second operand 14 states. [2020-10-29 09:12:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:06,348 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2020-10-29 09:12:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:12:06,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-29 09:12:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:06,351 INFO L225 Difference]: With dead ends: 236 [2020-10-29 09:12:06,351 INFO L226 Difference]: Without dead ends: 232 [2020-10-29 09:12:06,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-29 09:12:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 182. [2020-10-29 09:12:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-29 09:12:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 197 transitions. [2020-10-29 09:12:06,364 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 197 transitions. Word has length 62 [2020-10-29 09:12:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:06,364 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 197 transitions. [2020-10-29 09:12:06,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 197 transitions. [2020-10-29 09:12:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:12:06,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:06,365 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:06,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:12:06,365 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash 621358262, now seen corresponding path program 4 times [2020-10-29 09:12:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:06,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583458942] [2020-10-29 09:12:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:06,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:07,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:12:07,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:07,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1062 [2020-10-29 09:12:07,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:07,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:07,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:07,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:12:07,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:08,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:08,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:08,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:08,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:08,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:08,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:08,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:08,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:08,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:08,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583458942] [2020-10-29 09:12:08,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:08,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:08,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724980833] [2020-10-29 09:12:08,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:08,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:08,118 INFO L87 Difference]: Start difference. First operand 182 states and 197 transitions. Second operand 14 states. [2020-10-29 09:12:10,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:10,380 INFO L93 Difference]: Finished difference Result 315 states and 343 transitions. [2020-10-29 09:12:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:10,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-29 09:12:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:10,383 INFO L225 Difference]: With dead ends: 315 [2020-10-29 09:12:10,383 INFO L226 Difference]: Without dead ends: 311 [2020-10-29 09:12:10,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-29 09:12:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 254. [2020-10-29 09:12:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-29 09:12:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 274 transitions. [2020-10-29 09:12:10,400 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 274 transitions. Word has length 64 [2020-10-29 09:12:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:10,400 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 274 transitions. [2020-10-29 09:12:10,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 274 transitions. [2020-10-29 09:12:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:12:10,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:10,401 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:10,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:12:10,402 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:10,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1622625036, now seen corresponding path program 5 times [2020-10-29 09:12:10,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:10,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856055960] [2020-10-29 09:12:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1726 [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:12:12,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:12,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:12,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:12,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856055960] [2020-10-29 09:12:12,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:12,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:12,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371794816] [2020-10-29 09:12:12,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:12,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:12,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:12,696 INFO L87 Difference]: Start difference. First operand 254 states and 274 transitions. Second operand 14 states. [2020-10-29 09:12:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:14,943 INFO L93 Difference]: Finished difference Result 301 states and 327 transitions. [2020-10-29 09:12:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:14,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-29 09:12:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:14,946 INFO L225 Difference]: With dead ends: 301 [2020-10-29 09:12:14,946 INFO L226 Difference]: Without dead ends: 297 [2020-10-29 09:12:14,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-29 09:12:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 195. [2020-10-29 09:12:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-29 09:12:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 211 transitions. [2020-10-29 09:12:14,961 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 211 transitions. Word has length 64 [2020-10-29 09:12:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:14,961 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 211 transitions. [2020-10-29 09:12:14,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 211 transitions. [2020-10-29 09:12:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:12:14,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:14,962 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:14,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:12:14,962 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash -14524696, now seen corresponding path program 6 times [2020-10-29 09:12:14,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:14,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135069172] [2020-10-29 09:12:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:15,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:16,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1224 [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:12:16,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:17,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:17,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:17,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:17,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:17,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:17,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:17,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:17,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:12:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:17,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135069172] [2020-10-29 09:12:17,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:17,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:17,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658140818] [2020-10-29 09:12:17,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:17,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:17,130 INFO L87 Difference]: Start difference. First operand 195 states and 211 transitions. Second operand 15 states. [2020-10-29 09:12:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:19,571 INFO L93 Difference]: Finished difference Result 337 states and 368 transitions. [2020-10-29 09:12:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:12:19,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-29 09:12:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:19,574 INFO L225 Difference]: With dead ends: 337 [2020-10-29 09:12:19,574 INFO L226 Difference]: Without dead ends: 324 [2020-10-29 09:12:19,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:12:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-29 09:12:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 306. [2020-10-29 09:12:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-29 09:12:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 330 transitions. [2020-10-29 09:12:19,594 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 330 transitions. Word has length 67 [2020-10-29 09:12:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:19,594 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 330 transitions. [2020-10-29 09:12:19,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 330 transitions. [2020-10-29 09:12:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:12:19,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:19,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:19,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:12:19,595 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash 645006826, now seen corresponding path program 7 times [2020-10-29 09:12:19,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:19,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184290993] [2020-10-29 09:12:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:21,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1554 [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:12:21,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:21,640 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-29 09:12:21,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:21,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:21,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:21,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:21,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184290993] [2020-10-29 09:12:21,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:21,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:21,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855838952] [2020-10-29 09:12:21,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:21,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:21,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:21,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:21,894 INFO L87 Difference]: Start difference. First operand 306 states and 330 transitions. Second operand 15 states. [2020-10-29 09:12:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:25,215 INFO L93 Difference]: Finished difference Result 442 states and 485 transitions. [2020-10-29 09:12:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:12:25,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-29 09:12:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:25,219 INFO L225 Difference]: With dead ends: 442 [2020-10-29 09:12:25,220 INFO L226 Difference]: Without dead ends: 438 [2020-10-29 09:12:25,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:12:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-29 09:12:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 351. [2020-10-29 09:12:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-29 09:12:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 379 transitions. [2020-10-29 09:12:25,248 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 379 transitions. Word has length 67 [2020-10-29 09:12:25,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:25,249 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 379 transitions. [2020-10-29 09:12:25,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 379 transitions. [2020-10-29 09:12:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:12:25,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:25,250 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2020-10-29 09:12:25,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:12:25,250 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:25,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1491295580, now seen corresponding path program 1 times [2020-10-29 09:12:25,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:25,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144047289] [2020-10-29 09:12:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:25,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:25,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:27,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:27,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:12:27,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:27,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1941 [2020-10-29 09:12:27,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:27,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:27,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:27,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:27,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:12:27,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:27,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:27,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:27,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:27,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:27,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:27,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:27,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:27,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:27,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:27,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:27,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:28,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144047289] [2020-10-29 09:12:28,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:28,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:28,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733934037] [2020-10-29 09:12:28,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:28,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:28,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:28,002 INFO L87 Difference]: Start difference. First operand 351 states and 379 transitions. Second operand 15 states. [2020-10-29 09:12:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:30,113 INFO L93 Difference]: Finished difference Result 376 states and 409 transitions. [2020-10-29 09:12:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:12:30,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-29 09:12:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:30,116 INFO L225 Difference]: With dead ends: 376 [2020-10-29 09:12:30,116 INFO L226 Difference]: Without dead ends: 362 [2020-10-29 09:12:30,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:12:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-29 09:12:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 351. [2020-10-29 09:12:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-29 09:12:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 378 transitions. [2020-10-29 09:12:30,144 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 378 transitions. Word has length 67 [2020-10-29 09:12:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:30,145 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 378 transitions. [2020-10-29 09:12:30,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:30,145 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 378 transitions. [2020-10-29 09:12:30,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:12:30,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:30,146 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2020-10-29 09:12:30,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:12:30,146 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:30,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2144140194, now seen corresponding path program 2 times [2020-10-29 09:12:30,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:30,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397381318] [2020-10-29 09:12:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:30,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1194 [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:12:31,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:31,803 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-29 09:12:31,927 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-29 09:12:32,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:32,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:32,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:32,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:32,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:32,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:32,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:32,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:32,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:32,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397381318] [2020-10-29 09:12:32,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:32,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:32,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591123686] [2020-10-29 09:12:32,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:32,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:32,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:32,338 INFO L87 Difference]: Start difference. First operand 351 states and 378 transitions. Second operand 15 states. [2020-10-29 09:12:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:34,462 INFO L93 Difference]: Finished difference Result 454 states and 495 transitions. [2020-10-29 09:12:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:12:34,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-29 09:12:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:34,466 INFO L225 Difference]: With dead ends: 454 [2020-10-29 09:12:34,466 INFO L226 Difference]: Without dead ends: 440 [2020-10-29 09:12:34,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-29 09:12:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 396. [2020-10-29 09:12:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-29 09:12:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 428 transitions. [2020-10-29 09:12:34,497 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 428 transitions. Word has length 67 [2020-10-29 09:12:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:34,497 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 428 transitions. [2020-10-29 09:12:34,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 428 transitions. [2020-10-29 09:12:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:12:34,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:34,499 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2020-10-29 09:12:34,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:12:34,499 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash -864509670, now seen corresponding path program 3 times [2020-10-29 09:12:34,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:34,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21322171] [2020-10-29 09:12:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:35,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:35,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:12:35,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-29 09:12:35,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:35,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:12:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:36,338 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-29 09:12:36,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:36,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:36,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:36,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:36,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:36,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:36,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:36,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:36,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:36,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:36,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:36,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21322171] [2020-10-29 09:12:36,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:36,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:36,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797709927] [2020-10-29 09:12:36,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:36,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:36,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:36,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:36,672 INFO L87 Difference]: Start difference. First operand 396 states and 428 transitions. Second operand 16 states. [2020-10-29 09:12:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:39,725 INFO L93 Difference]: Finished difference Result 493 states and 536 transitions. [2020-10-29 09:12:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:12:39,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-29 09:12:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:39,729 INFO L225 Difference]: With dead ends: 493 [2020-10-29 09:12:39,729 INFO L226 Difference]: Without dead ends: 489 [2020-10-29 09:12:39,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:12:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-10-29 09:12:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 455. [2020-10-29 09:12:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-29 09:12:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 493 transitions. [2020-10-29 09:12:39,764 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 493 transitions. Word has length 67 [2020-10-29 09:12:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:39,764 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 493 transitions. [2020-10-29 09:12:39,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 493 transitions. [2020-10-29 09:12:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:12:39,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:39,766 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:39,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:12:39,766 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:39,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1286452606, now seen corresponding path program 8 times [2020-10-29 09:12:39,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:39,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767741349] [2020-10-29 09:12:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:39,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:41,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:42,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2811 [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:12:42,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:43,114 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-29 09:12:43,248 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-29 09:12:43,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:43,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:43,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:43,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:43,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:43,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:43,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:43,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:43,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:43,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:43,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:43,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767741349] [2020-10-29 09:12:43,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:43,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:43,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632970035] [2020-10-29 09:12:43,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:43,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:43,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:43,534 INFO L87 Difference]: Start difference. First operand 455 states and 493 transitions. Second operand 15 states. [2020-10-29 09:12:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:45,935 INFO L93 Difference]: Finished difference Result 485 states and 529 transitions. [2020-10-29 09:12:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:45,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-29 09:12:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:45,938 INFO L225 Difference]: With dead ends: 485 [2020-10-29 09:12:45,938 INFO L226 Difference]: Without dead ends: 472 [2020-10-29 09:12:45,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:12:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-29 09:12:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 455. [2020-10-29 09:12:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-29 09:12:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 492 transitions. [2020-10-29 09:12:45,969 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 492 transitions. Word has length 67 [2020-10-29 09:12:45,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:45,969 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 492 transitions. [2020-10-29 09:12:45,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 492 transitions. [2020-10-29 09:12:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:12:45,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:45,971 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 09:12:45,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:12:45,971 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash -204978148, now seen corresponding path program 2 times [2020-10-29 09:12:45,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:45,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039292490] [2020-10-29 09:12:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:46,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:48,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:48,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:12:48,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:48,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-10-29 09:12:48,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:48,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:48,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:48,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:48,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:12:48,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:48,551 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-29 09:12:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:48,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:48,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:48,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:48,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:48,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:48,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:48,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:48,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039292490] [2020-10-29 09:12:48,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:48,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:48,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80841281] [2020-10-29 09:12:48,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:48,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:48,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:48,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:48,908 INFO L87 Difference]: Start difference. First operand 455 states and 492 transitions. Second operand 16 states. [2020-10-29 09:12:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:52,274 INFO L93 Difference]: Finished difference Result 497 states and 540 transitions. [2020-10-29 09:12:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:12:52,275 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-29 09:12:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:52,278 INFO L225 Difference]: With dead ends: 497 [2020-10-29 09:12:52,278 INFO L226 Difference]: Without dead ends: 493 [2020-10-29 09:12:52,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:12:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2020-10-29 09:12:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 468. [2020-10-29 09:12:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-10-29 09:12:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 506 transitions. [2020-10-29 09:12:52,315 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 506 transitions. Word has length 67 [2020-10-29 09:12:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:52,315 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 506 transitions. [2020-10-29 09:12:52,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 506 transitions. [2020-10-29 09:12:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:12:52,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:52,317 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:52,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:12:52,318 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:52,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1945984128, now seen corresponding path program 5 times [2020-10-29 09:12:52,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:52,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853482557] [2020-10-29 09:12:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:52,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:54,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:55,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:56,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:56,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:12:56,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:56,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4171 [2020-10-29 09:12:56,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:56,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:56,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:56,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:56,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:12:56,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:56,980 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-29 09:12:57,271 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-29 09:12:57,404 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-29 09:12:57,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:57,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:57,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:57,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:57,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:57,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:57,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:57,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:57,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:57,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:57,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:57,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853482557] [2020-10-29 09:12:57,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:57,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:57,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774572736] [2020-10-29 09:12:57,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:57,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:57,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:57,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:57,687 INFO L87 Difference]: Start difference. First operand 468 states and 506 transitions. Second operand 15 states. [2020-10-29 09:13:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:00,055 INFO L93 Difference]: Finished difference Result 498 states and 542 transitions. [2020-10-29 09:13:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:13:00,056 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-29 09:13:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:00,058 INFO L225 Difference]: With dead ends: 498 [2020-10-29 09:13:00,058 INFO L226 Difference]: Without dead ends: 485 [2020-10-29 09:13:00,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:13:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-29 09:13:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 413. [2020-10-29 09:13:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-29 09:13:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 445 transitions. [2020-10-29 09:13:00,088 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 445 transitions. Word has length 67 [2020-10-29 09:13:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:00,088 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 445 transitions. [2020-10-29 09:13:00,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 445 transitions. [2020-10-29 09:13:00,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 09:13:00,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:00,090 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 09:13:00,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:13:00,091 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash 858831438, now seen corresponding path program 9 times [2020-10-29 09:13:00,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:00,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631627582] [2020-10-29 09:13:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:00,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:01,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:02,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:02,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:13:02,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:02,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2328 [2020-10-29 09:13:02,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:02,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:02,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:02,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:02,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:13:02,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:02,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:02,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:02,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:02,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:02,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631627582] [2020-10-29 09:13:02,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:02,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001539730] [2020-10-29 09:13:02,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:02,947 INFO L87 Difference]: Start difference. First operand 413 states and 445 transitions. Second operand 15 states. [2020-10-29 09:13:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:05,349 INFO L93 Difference]: Finished difference Result 442 states and 476 transitions. [2020-10-29 09:13:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:13:05,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-29 09:13:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:05,353 INFO L225 Difference]: With dead ends: 442 [2020-10-29 09:13:05,353 INFO L226 Difference]: Without dead ends: 386 [2020-10-29 09:13:05,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:13:05,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-29 09:13:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 385. [2020-10-29 09:13:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-29 09:13:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 413 transitions. [2020-10-29 09:13:05,384 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 413 transitions. Word has length 70 [2020-10-29 09:13:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:05,384 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 413 transitions. [2020-10-29 09:13:05,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 413 transitions. [2020-10-29 09:13:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 09:13:05,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:05,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2020-10-29 09:13:05,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:13:05,386 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1631029160, now seen corresponding path program 4 times [2020-10-29 09:13:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:05,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100204766] [2020-10-29 09:13:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:05,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:07,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:07,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:13:07,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1720 [2020-10-29 09:13:07,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:07,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 09:13:07,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:07,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:07,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:07,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:07,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:07,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:07,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:07,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:07,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:07,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:07,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100204766] [2020-10-29 09:13:07,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:07,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:07,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661739133] [2020-10-29 09:13:07,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:07,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:07,835 INFO L87 Difference]: Start difference. First operand 385 states and 413 transitions. Second operand 16 states. [2020-10-29 09:13:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:11,216 INFO L93 Difference]: Finished difference Result 410 states and 442 transitions. [2020-10-29 09:13:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:13:11,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-29 09:13:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:11,220 INFO L225 Difference]: With dead ends: 410 [2020-10-29 09:13:11,220 INFO L226 Difference]: Without dead ends: 406 [2020-10-29 09:13:11,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-29 09:13:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 385. [2020-10-29 09:13:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-29 09:13:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 413 transitions. [2020-10-29 09:13:11,245 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 413 transitions. Word has length 70 [2020-10-29 09:13:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:11,245 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 413 transitions. [2020-10-29 09:13:11,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 413 transitions. [2020-10-29 09:13:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 09:13:11,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:11,247 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 09:13:11,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-29 09:13:11,247 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash -512975860, now seen corresponding path program 10 times [2020-10-29 09:13:11,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:11,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235232929] [2020-10-29 09:13:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:13,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:13,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:13:13,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:13,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-29 09:13:13,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:13,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:13,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:13,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:13,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:13:13,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:14,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:14,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:14,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:14,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235232929] [2020-10-29 09:13:14,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:14,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:14,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019323572] [2020-10-29 09:13:14,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:14,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:14,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:14,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:14,077 INFO L87 Difference]: Start difference. First operand 385 states and 413 transitions. Second operand 15 states. [2020-10-29 09:13:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:16,588 INFO L93 Difference]: Finished difference Result 413 states and 446 transitions. [2020-10-29 09:13:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:13:16,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-29 09:13:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:16,591 INFO L225 Difference]: With dead ends: 413 [2020-10-29 09:13:16,591 INFO L226 Difference]: Without dead ends: 400 [2020-10-29 09:13:16,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:13:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-29 09:13:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 372. [2020-10-29 09:13:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-29 09:13:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 399 transitions. [2020-10-29 09:13:16,621 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 399 transitions. Word has length 70 [2020-10-29 09:13:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:16,621 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 399 transitions. [2020-10-29 09:13:16,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:16,621 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 399 transitions. [2020-10-29 09:13:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:13:16,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:16,623 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 09:13:16,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-29 09:13:16,623 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash 692698702, now seen corresponding path program 11 times [2020-10-29 09:13:16,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:16,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528471883] [2020-10-29 09:13:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:16,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:18,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:18,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:13:18,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:18,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1951 [2020-10-29 09:13:18,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:18,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:18,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:18,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:18,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:13:18,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:19,256 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-29 09:13:19,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:19,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:19,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:19,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:19,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:19,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:19,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:19,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:19,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:19,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528471883] [2020-10-29 09:13:19,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:19,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:19,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957971759] [2020-10-29 09:13:19,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:19,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:19,798 INFO L87 Difference]: Start difference. First operand 372 states and 399 transitions. Second operand 17 states. [2020-10-29 09:13:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:23,651 INFO L93 Difference]: Finished difference Result 573 states and 622 transitions. [2020-10-29 09:13:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:13:23,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-29 09:13:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:23,656 INFO L225 Difference]: With dead ends: 573 [2020-10-29 09:13:23,656 INFO L226 Difference]: Without dead ends: 560 [2020-10-29 09:13:23,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:13:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2020-10-29 09:13:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 512. [2020-10-29 09:13:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-10-29 09:13:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 553 transitions. [2020-10-29 09:13:23,695 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 553 transitions. Word has length 72 [2020-10-29 09:13:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:23,695 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 553 transitions. [2020-10-29 09:13:23,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 553 transitions. [2020-10-29 09:13:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:13:23,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:23,697 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 09:13:23,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-29 09:13:23,697 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:23,698 INFO L82 PathProgramCache]: Analyzing trace with hash 940845196, now seen corresponding path program 6 times [2020-10-29 09:13:23,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:23,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523200923] [2020-10-29 09:13:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:23,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:26,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2428 [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:13:26,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:26,728 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-29 09:13:26,897 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-29 09:13:27,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:27,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:27,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:27,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:27,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:27,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:27,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:27,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:27,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:27,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:27,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:27,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523200923] [2020-10-29 09:13:27,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:27,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:27,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715874586] [2020-10-29 09:13:27,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:27,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:27,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:27,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:27,260 INFO L87 Difference]: Start difference. First operand 512 states and 553 transitions. Second operand 17 states. [2020-10-29 09:13:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:32,651 INFO L93 Difference]: Finished difference Result 787 states and 857 transitions. [2020-10-29 09:13:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:13:32,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-29 09:13:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:32,655 INFO L225 Difference]: With dead ends: 787 [2020-10-29 09:13:32,656 INFO L226 Difference]: Without dead ends: 783 [2020-10-29 09:13:32,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:13:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-10-29 09:13:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 652. [2020-10-29 09:13:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2020-10-29 09:13:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 702 transitions. [2020-10-29 09:13:32,717 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 702 transitions. Word has length 72 [2020-10-29 09:13:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:32,717 INFO L481 AbstractCegarLoop]: Abstraction has 652 states and 702 transitions. [2020-10-29 09:13:32,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 702 transitions. [2020-10-29 09:13:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 09:13:32,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:32,719 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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, 1] [2020-10-29 09:13:32,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-29 09:13:32,719 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2084495943, now seen corresponding path program 2 times [2020-10-29 09:13:32,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:32,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439086044] [2020-10-29 09:13:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:33,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:34,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:34,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:13:34,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:34,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1519 [2020-10-29 09:13:34,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:34,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:34,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:13:34,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:35,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:35,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:35,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:35,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:35,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:35,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:35,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:35,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:35,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:35,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:35,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:35,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439086044] [2020-10-29 09:13:35,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:35,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:13:35,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632997086] [2020-10-29 09:13:35,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:13:35,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:13:35,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:13:35,183 INFO L87 Difference]: Start difference. First operand 652 states and 702 transitions. Second operand 14 states. [2020-10-29 09:13:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:37,174 INFO L93 Difference]: Finished difference Result 656 states and 705 transitions. [2020-10-29 09:13:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:13:37,175 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-29 09:13:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:37,178 INFO L225 Difference]: With dead ends: 656 [2020-10-29 09:13:37,178 INFO L226 Difference]: Without dead ends: 634 [2020-10-29 09:13:37,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:13:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-10-29 09:13:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2020-10-29 09:13:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2020-10-29 09:13:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 683 transitions. [2020-10-29 09:13:37,225 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 683 transitions. Word has length 73 [2020-10-29 09:13:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:37,225 INFO L481 AbstractCegarLoop]: Abstraction has 634 states and 683 transitions. [2020-10-29 09:13:37,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:13:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 683 transitions. [2020-10-29 09:13:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 09:13:37,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:37,227 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:37,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-29 09:13:37,227 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1809736329, now seen corresponding path program 8 times [2020-10-29 09:13:37,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:37,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929086396] [2020-10-29 09:13:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:37,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:39,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1857 [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:13:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:39,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:39,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:39,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:39,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:39,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:39,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:39,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:39,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:39,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:39,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:39,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:39,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:39,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929086396] [2020-10-29 09:13:39,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:39,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:13:39,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829969834] [2020-10-29 09:13:39,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:13:39,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:39,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:13:39,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:13:39,988 INFO L87 Difference]: Start difference. First operand 634 states and 683 transitions. Second operand 14 states. [2020-10-29 09:13:40,710 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-29 09:13:41,016 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-29 09:13:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:41,765 INFO L93 Difference]: Finished difference Result 734 states and 797 transitions. [2020-10-29 09:13:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:13:41,766 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-29 09:13:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:41,770 INFO L225 Difference]: With dead ends: 734 [2020-10-29 09:13:41,770 INFO L226 Difference]: Without dead ends: 686 [2020-10-29 09:13:41,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:13:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-10-29 09:13:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 626. [2020-10-29 09:13:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2020-10-29 09:13:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 668 transitions. [2020-10-29 09:13:41,806 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 668 transitions. Word has length 73 [2020-10-29 09:13:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:41,806 INFO L481 AbstractCegarLoop]: Abstraction has 626 states and 668 transitions. [2020-10-29 09:13:41,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:13:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 668 transitions. [2020-10-29 09:13:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 09:13:41,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:41,808 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:41,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-29 09:13:41,808 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1208476937, now seen corresponding path program 9 times [2020-10-29 09:13:41,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:41,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314175198] [2020-10-29 09:13:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:41,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking...