/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/sll-buckets-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:10:29,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:10:29,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:10:29,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:10:29,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:10:29,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:10:29,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:10:29,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:10:29,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:10:29,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:10:29,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:10:29,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:10:29,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:10:29,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:10:29,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:10:29,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:10:29,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:10:29,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:10:29,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:10:29,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:10:29,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:10:29,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:10:29,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:10:29,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:10:29,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:10:29,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:10:29,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:10:29,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:10:29,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:10:29,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:10:29,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:10:29,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:10:29,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:10:29,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:10:29,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:10:29,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:10:29,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:10:29,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:10:29,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:10:29,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:10:29,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:10:29,624 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 09:10:29,682 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:10:29,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:10:29,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:10:29,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:10:29,688 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:10:29,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:10:29,688 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:10:29,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:10:29,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:10:29,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:10:29,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:10:29,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:10:29,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:10:29,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:10:29,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:10:29,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:10:29,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:10:29,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:10:29,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:10:29,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:10:29,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:10:29,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:29,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:10:29,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:10:29,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:10:29,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:10:29,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:10:29,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:10:29,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:10:29,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:10:30,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:10:30,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:10:30,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:10:30,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:10:30,231 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:10:30,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-buckets-1.i [2020-10-29 09:10:30,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50966ab43/5582ca5b86ae48d98550363994dfe5e8/FLAG5245604c2 [2020-10-29 09:10:31,172 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:10:31,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-buckets-1.i [2020-10-29 09:10:31,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50966ab43/5582ca5b86ae48d98550363994dfe5e8/FLAG5245604c2 [2020-10-29 09:10:31,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50966ab43/5582ca5b86ae48d98550363994dfe5e8 [2020-10-29 09:10:31,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:10:31,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:10:31,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:31,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:10:31,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:10:31,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:31,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3216ae80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31, skipping insertion in model container [2020-10-29 09:10:31,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:31,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:10:31,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:10:31,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:31,745 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:10:31,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:31,894 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:10:31,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31 WrapperNode [2020-10-29 09:10:31,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:31,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:10:31,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:10:31,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:10:31,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:31,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:31,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:31,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:32,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:32,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:32,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (1/1) ... [2020-10-29 09:10:32,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:10:32,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:10:32,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:10:32,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:10:32,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (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 09:10:32,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:10:32,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:10:32,221 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:10:32,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:10:32,222 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:10:32,222 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:10:32,222 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:10:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:10:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:10:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:10:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:10:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:10:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:10:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:10:32,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:10:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:10:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:10:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:10:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:10:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:10:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:10:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:10:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:10:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:10:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:10:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:10:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:10:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:10:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:10:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:10:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:10:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:10:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:10:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:10:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:10:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:10:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:10:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:10:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:10:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:10:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:10:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:10:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:10:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:10:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:10:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:10:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:10:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:10:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:10:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:10:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:10:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:10:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:10:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:10:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:10:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:10:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:10:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:10:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:10:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:10:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:10:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:10:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:10:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:10:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:10:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:10:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:10:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:10:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:10:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:10:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:10:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:10:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:10:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:10:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:10:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:10:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:10:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:10:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:10:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:10:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:10:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:10:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:10:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:10:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:10:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:10:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:10:32,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:10:32,246 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:10:32,246 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:10:32,246 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:10:32,246 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:10:32,246 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:10:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:10:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:10:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:10:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:10:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:10:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:10:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:10:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:10:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:10:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:10:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:10:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:10:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:10:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:10:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:10:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:10:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:10:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:10:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:10:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:10:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:10:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:10:32,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:10:32,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:10:32,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:10:32,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:10:32,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:10:32,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:10:32,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:10:32,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:10:33,181 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:10:33,181 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-10-29 09:10:33,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:33 BoogieIcfgContainer [2020-10-29 09:10:33,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:10:33,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:10:33,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:10:33,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:10:33,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:10:31" (1/3) ... [2020-10-29 09:10:33,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f6b6ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:33, skipping insertion in model container [2020-10-29 09:10:33,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:31" (2/3) ... [2020-10-29 09:10:33,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f6b6ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:33, skipping insertion in model container [2020-10-29 09:10:33,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:33" (3/3) ... [2020-10-29 09:10:33,193 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-1.i [2020-10-29 09:10:33,207 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:10:33,212 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:10:33,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:10:33,255 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:10:33,255 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:10:33,255 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:10:33,255 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:10:33,256 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:10:33,256 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:10:33,256 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:10:33,256 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:10:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-29 09:10:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:10:33,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:33,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:33,283 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2031057720, now seen corresponding path program 1 times [2020-10-29 09:10:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:33,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099958010] [2020-10-29 09:10:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:10:33,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:33,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-29 09:10:33,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:33,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:33,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:10:33,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:10:34,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:34,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:34,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:34,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:34,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 09:10:34,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:34,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:34,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:34,183 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 09:10:34,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099958010] [2020-10-29 09:10:34,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:34,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:34,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204311122] [2020-10-29 09:10:34,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:34,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:34,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:34,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:34,220 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 5 states. [2020-10-29 09:10:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:34,612 INFO L93 Difference]: Finished difference Result 120 states and 208 transitions. [2020-10-29 09:10:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:34,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-29 09:10:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:34,625 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:10:34,626 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:10:34,631 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 09:10:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:10:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2020-10-29 09:10:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:10:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-29 09:10:34,763 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 14 [2020-10-29 09:10:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:34,763 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-29 09:10:34,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-29 09:10:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:10:34,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:34,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:34,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:10:34,766 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1948730651, now seen corresponding path program 1 times [2020-10-29 09:10:34,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:34,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721771042] [2020-10-29 09:10:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:34,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:10:35,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:35,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-29 09:10:35,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:10:35,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:10:35,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:35,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:35,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:35,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:35,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:35,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:35,511 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 09:10:35,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721771042] [2020-10-29 09:10:35,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:35,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:35,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804140832] [2020-10-29 09:10:35,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:35,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:35,527 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 6 states. [2020-10-29 09:10:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:35,906 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2020-10-29 09:10:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:35,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 09:10:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:35,910 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:10:35,910 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:10:35,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:10:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-29 09:10:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:10:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-29 09:10:35,924 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 15 [2020-10-29 09:10:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:35,925 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-29 09:10:35,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-29 09:10:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:10:35,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:35,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:35,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:10:35,926 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:35,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1947134467, now seen corresponding path program 1 times [2020-10-29 09:10:35,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:35,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131573524] [2020-10-29 09:10:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:10:36,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:36,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-29 09:10:36,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:36,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:10:36,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:10:36,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:36,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:36,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:36,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:36,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:36,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:36,090 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 09:10:36,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131573524] [2020-10-29 09:10:36,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:36,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:36,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18888769] [2020-10-29 09:10:36,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:36,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:36,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:36,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:36,094 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2020-10-29 09:10:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:36,404 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-29 09:10:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:36,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-29 09:10:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:36,406 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:10:36,406 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:10:36,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:10:36,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-29 09:10:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:10:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-29 09:10:36,416 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 16 [2020-10-29 09:10:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:36,417 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-29 09:10:36,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-29 09:10:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:10:36,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:36,418 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] [2020-10-29 09:10:36,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:10:36,419 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 59150788, now seen corresponding path program 1 times [2020-10-29 09:10:36,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960843178] [2020-10-29 09:10:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:10:36,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:36,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-29 09:10:36,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:10:36,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:37,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:37,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:37,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:37,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:37,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:37,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:37,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:37,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:37,159 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 09:10:37,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960843178] [2020-10-29 09:10:37,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:37,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:37,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568268370] [2020-10-29 09:10:37,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:37,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:37,162 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 8 states. [2020-10-29 09:10:37,562 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-29 09:10:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:37,846 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-10-29 09:10:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:37,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-29 09:10:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:37,848 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:10:37,848 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:10:37,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:10:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-29 09:10:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:10:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-29 09:10:37,858 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 21 [2020-10-29 09:10:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:37,858 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-29 09:10:37,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-29 09:10:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:10:37,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:37,860 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] [2020-10-29 09:10:37,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:10:37,860 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash -465827442, now seen corresponding path program 1 times [2020-10-29 09:10:37,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:37,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120094340] [2020-10-29 09:10:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:37,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:38,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:10:38,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:38,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-29 09:10:38,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:38,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:10:38,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:38,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:38,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:38,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:38,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:38,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:38,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:38,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:38,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:38,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:38,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:38,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120094340] [2020-10-29 09:10:38,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:38,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:10:38,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769229322] [2020-10-29 09:10:38,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:38,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:38,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:38,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:38,803 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 8 states. [2020-10-29 09:10:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:39,486 INFO L93 Difference]: Finished difference Result 126 states and 156 transitions. [2020-10-29 09:10:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:39,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-29 09:10:39,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:39,489 INFO L225 Difference]: With dead ends: 126 [2020-10-29 09:10:39,489 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:10:39,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:10:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2020-10-29 09:10:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:10:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-29 09:10:39,502 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 22 [2020-10-29 09:10:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:39,503 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-29 09:10:39,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-29 09:10:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:10:39,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:39,504 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 09:10:39,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:10:39,505 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1475919637, now seen corresponding path program 1 times [2020-10-29 09:10:39,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:39,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258957079] [2020-10-29 09:10:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:39,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:39,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:10:39,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:39,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-29 09:10:39,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:39,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:10:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:39,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:39,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:39,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:39,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:39,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:39,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:39,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:39,893 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 09:10:39,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258957079] [2020-10-29 09:10:39,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:39,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582823286] [2020-10-29 09:10:39,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:39,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:39,896 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 8 states. [2020-10-29 09:10:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:40,434 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2020-10-29 09:10:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:40,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 09:10:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:40,436 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:10:40,437 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 09:10:40,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 09:10:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 75. [2020-10-29 09:10:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:10:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-10-29 09:10:40,450 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 23 [2020-10-29 09:10:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:40,450 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-10-29 09:10:40,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-10-29 09:10:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:10:40,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:40,452 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:40,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:10:40,452 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1979879590, now seen corresponding path program 2 times [2020-10-29 09:10:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:40,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742342313] [2020-10-29 09:10:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:10:41,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:41,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-29 09:10:41,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:41,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:41,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:41,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:41,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:41,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:41,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742342313] [2020-10-29 09:10:41,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:41,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:41,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780353781] [2020-10-29 09:10:41,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:41,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:41,392 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 9 states. [2020-10-29 09:10:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:42,302 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2020-10-29 09:10:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:42,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-29 09:10:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:42,304 INFO L225 Difference]: With dead ends: 158 [2020-10-29 09:10:42,304 INFO L226 Difference]: Without dead ends: 122 [2020-10-29 09:10:42,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:10:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-29 09:10:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-29 09:10:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:10:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-10-29 09:10:42,334 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 25 [2020-10-29 09:10:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:42,335 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-10-29 09:10:42,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-10-29 09:10:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:10:42,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:42,338 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:42,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:10:42,339 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1294019352, now seen corresponding path program 1 times [2020-10-29 09:10:42,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:42,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116894156] [2020-10-29 09:10:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:42,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:10:42,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:42,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-29 09:10:42,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:42,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:10:42,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:42,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:42,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:42,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:42,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:42,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:42,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:42,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:42,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:42,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116894156] [2020-10-29 09:10:42,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:42,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:42,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100240237] [2020-10-29 09:10:42,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:42,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:42,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:42,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:42,774 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 9 states. [2020-10-29 09:10:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:43,571 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2020-10-29 09:10:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:43,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-29 09:10:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:43,573 INFO L225 Difference]: With dead ends: 143 [2020-10-29 09:10:43,573 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:10:43,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:10:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-10-29 09:10:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:10:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-10-29 09:10:43,586 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 25 [2020-10-29 09:10:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:43,586 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-10-29 09:10:43,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-10-29 09:10:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:10:43,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:43,589 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:43,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:10:43,589 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1844994340, now seen corresponding path program 2 times [2020-10-29 09:10:43,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:43,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900404461] [2020-10-29 09:10:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:43,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:44,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:44,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:10:44,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:44,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-29 09:10:44,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:44,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:10:44,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:44,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:44,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:44,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:44,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:44,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:44,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:44,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:44,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:44,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:44,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900404461] [2020-10-29 09:10:44,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:44,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:44,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579821660] [2020-10-29 09:10:44,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:44,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:44,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:44,456 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 10 states. [2020-10-29 09:10:44,974 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-29 09:10:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:45,555 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-10-29 09:10:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:45,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:10:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:45,557 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:10:45,557 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:10:45,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:10:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:10:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-10-29 09:10:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:10:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-10-29 09:10:45,568 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 26 [2020-10-29 09:10:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:45,568 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-10-29 09:10:45,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-10-29 09:10:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:45,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:45,570 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:45,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:10:45,570 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:45,571 INFO L82 PathProgramCache]: Analyzing trace with hash -692394339, now seen corresponding path program 2 times [2020-10-29 09:10:45,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:45,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348911658] [2020-10-29 09:10:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:45,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:45,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:45,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-29 09:10:45,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:45,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:45,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:45,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:45,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:10:45,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:46,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:46,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:46,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:46,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:46,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:46,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:46,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:46,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:46,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:46,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:46,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:46,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348911658] [2020-10-29 09:10:46,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:46,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:46,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551569663] [2020-10-29 09:10:46,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:46,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:46,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:46,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:46,115 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 10 states. [2020-10-29 09:10:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:47,479 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2020-10-29 09:10:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:47,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 09:10:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:47,481 INFO L225 Difference]: With dead ends: 168 [2020-10-29 09:10:47,481 INFO L226 Difference]: Without dead ends: 132 [2020-10-29 09:10:47,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:10:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-29 09:10:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-29 09:10:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:10:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2020-10-29 09:10:47,505 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 27 [2020-10-29 09:10:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:47,506 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2020-10-29 09:10:47,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2020-10-29 09:10:47,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:47,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:47,509 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] [2020-10-29 09:10:47,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:10:47,510 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:47,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:47,510 INFO L82 PathProgramCache]: Analyzing trace with hash 95128516, now seen corresponding path program 1 times [2020-10-29 09:10:47,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:47,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616396081] [2020-10-29 09:10:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:47,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:48,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:48,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:48,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:48,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-29 09:10:48,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:48,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:10:48,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:48,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:48,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:48,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:48,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:48,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:48,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:48,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:48,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:48,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:48,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:48,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:48,912 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 09:10:48,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616396081] [2020-10-29 09:10:48,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:48,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:48,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646504685] [2020-10-29 09:10:48,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:48,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:48,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:48,914 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 11 states. [2020-10-29 09:10:49,196 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-29 09:10:49,653 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-29 09:10:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:50,506 INFO L93 Difference]: Finished difference Result 141 states and 172 transitions. [2020-10-29 09:10:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:10:50,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:10:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:50,508 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:10:50,508 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 09:10:50,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:10:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 09:10:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2020-10-29 09:10:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 09:10:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2020-10-29 09:10:50,523 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 30 [2020-10-29 09:10:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:50,523 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2020-10-29 09:10:50,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2020-10-29 09:10:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:50,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:50,524 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:50,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:10:50,525 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1054790204, now seen corresponding path program 3 times [2020-10-29 09:10:50,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:50,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854494826] [2020-10-29 09:10:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:50,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:51,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:51,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:51,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-29 09:10:51,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:51,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:51,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:51,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:51,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:10:51,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:10:51,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:51,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:51,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:51,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:51,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:51,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:51,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:51,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:51,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854494826] [2020-10-29 09:10:51,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:51,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:51,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677478732] [2020-10-29 09:10:51,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:51,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:51,455 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand 10 states. [2020-10-29 09:10:51,829 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-29 09:10:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:52,201 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-10-29 09:10:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:52,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-29 09:10:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:52,202 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:10:52,203 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:10:52,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:10:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-29 09:10:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:10:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2020-10-29 09:10:52,214 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 31 [2020-10-29 09:10:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:52,214 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2020-10-29 09:10:52,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2020-10-29 09:10:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:52,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:52,216 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 09:10:52,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:10:52,216 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1879455157, now seen corresponding path program 1 times [2020-10-29 09:10:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:52,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616565151] [2020-10-29 09:10:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:52,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:53,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:53,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:53,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-29 09:10:53,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:53,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:53,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:53,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:10:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:53,610 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-29 09:10:53,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:53,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:53,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:53,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:53,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:53,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:53,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:53,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:53,880 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 09:10:53,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616565151] [2020-10-29 09:10:53,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:53,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:53,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597340264] [2020-10-29 09:10:53,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:53,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:53,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:53,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:53,883 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand 11 states. [2020-10-29 09:10:54,770 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-29 09:10:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:55,676 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2020-10-29 09:10:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:10:55,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-29 09:10:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:55,678 INFO L225 Difference]: With dead ends: 184 [2020-10-29 09:10:55,678 INFO L226 Difference]: Without dead ends: 171 [2020-10-29 09:10:55,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:10:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-29 09:10:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2020-10-29 09:10:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 09:10:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2020-10-29 09:10:55,691 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 31 [2020-10-29 09:10:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:55,691 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2020-10-29 09:10:55,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2020-10-29 09:10:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:10:55,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:55,692 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:55,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:10:55,692 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1897728791, now seen corresponding path program 1 times [2020-10-29 09:10:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:55,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609902719] [2020-10-29 09:10:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:55,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:55,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:55,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:57,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:10:57,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-10-29 09:10:57,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:57,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:10:57,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:57,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:57,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:57,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:57,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:57,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:57,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:57,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:57,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:57,419 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 09:10:57,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609902719] [2020-10-29 09:10:57,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:57,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:57,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471238918] [2020-10-29 09:10:57,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:57,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:57,422 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand 10 states. [2020-10-29 09:10:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:58,619 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2020-10-29 09:10:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:10:58,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-29 09:10:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:58,623 INFO L225 Difference]: With dead ends: 191 [2020-10-29 09:10:58,623 INFO L226 Difference]: Without dead ends: 176 [2020-10-29 09:10:58,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:10:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-29 09:10:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 137. [2020-10-29 09:10:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:10:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-10-29 09:10:58,639 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 34 [2020-10-29 09:10:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:58,639 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-10-29 09:10:58,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-10-29 09:10:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:58,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:58,641 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] [2020-10-29 09:10:58,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:10:58,641 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:58,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1109416156, now seen corresponding path program 1 times [2020-10-29 09:10:58,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:58,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244505121] [2020-10-29 09:10:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:59,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:59,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:00,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:02,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:02,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:02,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:11:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3815 [2020-10-29 09:11:02,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:02,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:11:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:11:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:11:02,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:02,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:02,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:02,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:02,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:02,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:02,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:02,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:02,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:02,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:02,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:02,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:02,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:02,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244505121] [2020-10-29 09:11:02,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:02,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:11:02,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521538708] [2020-10-29 09:11:02,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:11:02,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:02,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:11:02,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:11:02,614 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 7 states. [2020-10-29 09:11:03,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:03,152 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2020-10-29 09:11:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:03,153 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-29 09:11:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:03,154 INFO L225 Difference]: With dead ends: 180 [2020-10-29 09:11:03,154 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:11:03,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:11:03,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2020-10-29 09:11:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 09:11:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2020-10-29 09:11:03,169 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 35 [2020-10-29 09:11:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:03,169 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2020-10-29 09:11:03,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:11:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2020-10-29 09:11:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:03,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:03,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:03,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:11:03,171 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:03,171 INFO L82 PathProgramCache]: Analyzing trace with hash 640155104, now seen corresponding path program 1 times [2020-10-29 09:11:03,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:03,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979352900] [2020-10-29 09:11:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:03,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:03,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:03,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:03,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:03,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:03,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-29 09:11:03,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:03,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:11:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:11:03,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:04,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:04,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:04,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:04,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:04,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:04,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:04,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:04,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979352900] [2020-10-29 09:11:04,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:04,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:04,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522335924] [2020-10-29 09:11:04,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:04,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:04,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:04,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:04,128 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand 9 states. [2020-10-29 09:11:04,477 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-29 09:11:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:05,248 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2020-10-29 09:11:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:05,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-29 09:11:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:05,250 INFO L225 Difference]: With dead ends: 198 [2020-10-29 09:11:05,250 INFO L226 Difference]: Without dead ends: 185 [2020-10-29 09:11:05,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:11:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-29 09:11:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2020-10-29 09:11:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-29 09:11:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 203 transitions. [2020-10-29 09:11:05,274 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 203 transitions. Word has length 35 [2020-10-29 09:11:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:05,275 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 203 transitions. [2020-10-29 09:11:05,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 203 transitions. [2020-10-29 09:11:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:11:05,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:05,276 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] [2020-10-29 09:11:05,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:11:05,277 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:05,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1926754748, now seen corresponding path program 1 times [2020-10-29 09:11:05,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:05,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983136931] [2020-10-29 09:11:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:05,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:05,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:06,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:06,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:11:06,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:06,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-29 09:11:06,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:06,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:06,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:11:06,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:06,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:11:06,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:06,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:06,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:06,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:06,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:06,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:06,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:06,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:06,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:06,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:06,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:06,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:06,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:11:06,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983136931] [2020-10-29 09:11:06,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:06,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:11:06,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410516659] [2020-10-29 09:11:06,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:06,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:06,185 INFO L87 Difference]: Start difference. First operand 163 states and 203 transitions. Second operand 8 states. [2020-10-29 09:11:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:06,636 INFO L93 Difference]: Finished difference Result 226 states and 282 transitions. [2020-10-29 09:11:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:06,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-29 09:11:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:06,638 INFO L225 Difference]: With dead ends: 226 [2020-10-29 09:11:06,638 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:11:06,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:11:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-29 09:11:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-29 09:11:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2020-10-29 09:11:06,654 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 36 [2020-10-29 09:11:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:06,654 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2020-10-29 09:11:06,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2020-10-29 09:11:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:11:06,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:06,656 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] [2020-10-29 09:11:06,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:11:06,656 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash -420358268, now seen corresponding path program 1 times [2020-10-29 09:11:06,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:06,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509571074] [2020-10-29 09:11:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:06,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:07,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-29 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:07,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:07,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:07,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:07,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:07,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:08,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:08,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:08,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:08,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:08,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:08,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:08,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:08,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:08,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:08,303 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 09:11:08,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509571074] [2020-10-29 09:11:08,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:08,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:08,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065203164] [2020-10-29 09:11:08,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:08,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:08,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:08,305 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand 12 states. [2020-10-29 09:11:08,591 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-29 09:11:08,754 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-29 09:11:09,046 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-29 09:11:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:10,178 INFO L93 Difference]: Finished difference Result 197 states and 241 transitions. [2020-10-29 09:11:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:11:10,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-29 09:11:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:10,180 INFO L225 Difference]: With dead ends: 197 [2020-10-29 09:11:10,180 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:11:10,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:11:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:11:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 159. [2020-10-29 09:11:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-29 09:11:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 194 transitions. [2020-10-29 09:11:10,197 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 194 transitions. Word has length 36 [2020-10-29 09:11:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:10,197 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 194 transitions. [2020-10-29 09:11:10,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 194 transitions. [2020-10-29 09:11:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:11:10,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:10,198 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:10,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:11:10,199 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:10,199 INFO L82 PathProgramCache]: Analyzing trace with hash -530449291, now seen corresponding path program 1 times [2020-10-29 09:11:10,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:10,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331139911] [2020-10-29 09:11:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:11:10,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-29 09:11:10,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:11:10,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:10,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:10,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:11:10,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331139911] [2020-10-29 09:11:10,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:10,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336881681] [2020-10-29 09:11:10,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:10,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:10,701 INFO L87 Difference]: Start difference. First operand 159 states and 194 transitions. Second operand 9 states. [2020-10-29 09:11:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:11,254 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2020-10-29 09:11:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:11:11,254 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-29 09:11:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:11,255 INFO L225 Difference]: With dead ends: 219 [2020-10-29 09:11:11,255 INFO L226 Difference]: Without dead ends: 215 [2020-10-29 09:11:11,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-29 09:11:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 165. [2020-10-29 09:11:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-29 09:11:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2020-10-29 09:11:11,272 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 37 [2020-10-29 09:11:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:11,272 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2020-10-29 09:11:11,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2020-10-29 09:11:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:11,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:11,274 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:11,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:11:11,274 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:11,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:11,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1224274728, now seen corresponding path program 1 times [2020-10-29 09:11:11,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:11,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018282570] [2020-10-29 09:11:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:11,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:13,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:13,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2022 [2020-10-29 09:11:13,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:13,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:13,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:11:13,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,831 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-29 09:11:13,990 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-29 09:11:14,516 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 83 [2020-10-29 09:11:14,729 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-29 09:11:14,917 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-29 09:11:15,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:15,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:15,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:15,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:15,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:15,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:15,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:15,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:11:15,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018282570] [2020-10-29 09:11:15,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:15,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:15,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746883885] [2020-10-29 09:11:15,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:15,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:15,361 INFO L87 Difference]: Start difference. First operand 165 states and 202 transitions. Second operand 14 states. [2020-10-29 09:11:16,071 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 93 [2020-10-29 09:11:16,230 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-29 09:11:17,076 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 113 [2020-10-29 09:11:17,252 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-29 09:11:17,800 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 100 [2020-10-29 09:11:18,127 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-29 09:11:18,331 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-29 09:11:18,869 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 119 [2020-10-29 09:11:19,331 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 89 [2020-10-29 09:11:19,626 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-10-29 09:11:20,075 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 108 [2020-10-29 09:11:20,295 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-29 09:11:20,678 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-29 09:11:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:21,196 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2020-10-29 09:11:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:11:21,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-29 09:11:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:21,199 INFO L225 Difference]: With dead ends: 208 [2020-10-29 09:11:21,199 INFO L226 Difference]: Without dead ends: 204 [2020-10-29 09:11:21,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:11:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-29 09:11:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2020-10-29 09:11:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-29 09:11:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 223 transitions. [2020-10-29 09:11:21,221 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 223 transitions. Word has length 38 [2020-10-29 09:11:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:21,222 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 223 transitions. [2020-10-29 09:11:21,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 223 transitions. [2020-10-29 09:11:21,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:21,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:21,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:21,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:11:21,223 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:21,223 INFO L82 PathProgramCache]: Analyzing trace with hash 487110175, now seen corresponding path program 1 times [2020-10-29 09:11:21,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:21,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581330562] [2020-10-29 09:11:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:21,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:21,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:21,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:21,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-29 09:11:21,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:21,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:21,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:21,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:21,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:11:21,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:21,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:21,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:21,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:21,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:21,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:21,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:21,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:11:21,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581330562] [2020-10-29 09:11:21,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:21,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:21,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766866516] [2020-10-29 09:11:21,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:21,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:21,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:21,782 INFO L87 Difference]: Start difference. First operand 183 states and 223 transitions. Second operand 9 states. [2020-10-29 09:11:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:22,469 INFO L93 Difference]: Finished difference Result 247 states and 304 transitions. [2020-10-29 09:11:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:11:22,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-29 09:11:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:22,471 INFO L225 Difference]: With dead ends: 247 [2020-10-29 09:11:22,471 INFO L226 Difference]: Without dead ends: 180 [2020-10-29 09:11:22,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-29 09:11:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-29 09:11:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:11:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 217 transitions. [2020-10-29 09:11:22,492 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 217 transitions. Word has length 38 [2020-10-29 09:11:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:22,492 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 217 transitions. [2020-10-29 09:11:22,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 217 transitions. [2020-10-29 09:11:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:22,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:22,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:22,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:11:22,493 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:22,495 INFO L82 PathProgramCache]: Analyzing trace with hash 161928666, now seen corresponding path program 1 times [2020-10-29 09:11:22,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:22,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411904020] [2020-10-29 09:11:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:22,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:23,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:23,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:23,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-29 09:11:23,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:23,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:23,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:23,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:23,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:11:23,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:24,220 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-29 09:11:24,604 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-29 09:11:24,917 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-10-29 09:11:25,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:25,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:25,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:25,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:25,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:25,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:25,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:25,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:11:25,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411904020] [2020-10-29 09:11:25,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:25,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:25,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994997477] [2020-10-29 09:11:25,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:25,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:25,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:25,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:25,204 INFO L87 Difference]: Start difference. First operand 180 states and 217 transitions. Second operand 14 states. [2020-10-29 09:11:25,692 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2020-10-29 09:11:26,256 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2020-10-29 09:11:26,677 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 67 [2020-10-29 09:11:26,884 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-29 09:11:27,136 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-29 09:11:27,706 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2020-10-29 09:11:28,091 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2020-10-29 09:11:28,685 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-10-29 09:11:29,277 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 87 [2020-10-29 09:11:29,566 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2020-10-29 09:11:29,841 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-10-29 09:11:30,176 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-29 09:11:30,701 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-29 09:11:31,267 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 84 [2020-10-29 09:11:31,771 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-29 09:11:32,583 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2020-10-29 09:11:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:32,685 INFO L93 Difference]: Finished difference Result 312 states and 381 transitions. [2020-10-29 09:11:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:11:32,689 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-29 09:11:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:32,691 INFO L225 Difference]: With dead ends: 312 [2020-10-29 09:11:32,691 INFO L226 Difference]: Without dead ends: 297 [2020-10-29 09:11:32,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:11:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-29 09:11:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 238. [2020-10-29 09:11:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-29 09:11:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 292 transitions. [2020-10-29 09:11:32,721 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 292 transitions. Word has length 38 [2020-10-29 09:11:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:32,721 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 292 transitions. [2020-10-29 09:11:32,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 292 transitions. [2020-10-29 09:11:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:32,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:32,722 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:32,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:11:32,722 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash -915257247, now seen corresponding path program 1 times [2020-10-29 09:11:32,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:32,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878169074] [2020-10-29 09:11:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:32,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:32,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:33,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:33,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:33,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:33,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-29 09:11:33,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:33,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:33,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:11:33,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:11:33,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:33,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:33,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:33,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:33,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:33,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:33,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:33,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:33,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:33,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:33,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:33,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:33,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:33,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878169074] [2020-10-29 09:11:33,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:33,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:33,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094104762] [2020-10-29 09:11:33,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:33,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:33,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:33,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:33,696 INFO L87 Difference]: Start difference. First operand 238 states and 292 transitions. Second operand 10 states. [2020-10-29 09:11:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:34,449 INFO L93 Difference]: Finished difference Result 286 states and 352 transitions. [2020-10-29 09:11:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:11:34,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-29 09:11:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:34,451 INFO L225 Difference]: With dead ends: 286 [2020-10-29 09:11:34,451 INFO L226 Difference]: Without dead ends: 226 [2020-10-29 09:11:34,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-29 09:11:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-29 09:11:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-29 09:11:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 275 transitions. [2020-10-29 09:11:34,483 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 275 transitions. Word has length 38 [2020-10-29 09:11:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:34,484 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 275 transitions. [2020-10-29 09:11:34,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 275 transitions. [2020-10-29 09:11:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:11:34,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:34,485 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:34,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:11:34,485 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1660103494, now seen corresponding path program 2 times [2020-10-29 09:11:34,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:34,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552545124] [2020-10-29 09:11:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:34,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:35,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:11:35,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:11:35,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1459 [2020-10-29 09:11:35,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:35,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:11:35,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:36,284 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-10-29 09:11:36,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:36,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:36,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:36,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:36,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:36,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:36,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:36,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:36,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:36,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:36,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:36,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552545124] [2020-10-29 09:11:36,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:36,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:36,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907338057] [2020-10-29 09:11:36,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:36,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:36,489 INFO L87 Difference]: Start difference. First operand 226 states and 275 transitions. Second operand 13 states. [2020-10-29 09:11:36,945 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-29 09:11:37,185 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-29 09:11:37,538 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-29 09:11:37,742 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-29 09:11:37,950 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-29 09:11:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:38,515 INFO L93 Difference]: Finished difference Result 345 states and 432 transitions. [2020-10-29 09:11:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:38,516 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-29 09:11:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:38,518 INFO L225 Difference]: With dead ends: 345 [2020-10-29 09:11:38,518 INFO L226 Difference]: Without dead ends: 341 [2020-10-29 09:11:38,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:11:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-29 09:11:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 259. [2020-10-29 09:11:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-29 09:11:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 321 transitions. [2020-10-29 09:11:38,542 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 321 transitions. Word has length 39 [2020-10-29 09:11:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:38,542 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 321 transitions. [2020-10-29 09:11:38,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 321 transitions. [2020-10-29 09:11:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:11:38,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:38,543 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:38,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:11:38,543 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:38,544 INFO L82 PathProgramCache]: Analyzing trace with hash -631066689, now seen corresponding path program 3 times [2020-10-29 09:11:38,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:38,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446631461] [2020-10-29 09:11:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:38,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:39,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:39,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:11:39,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:39,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-29 09:11:39,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:39,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:11:39,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:39,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:39,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:39,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:39,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:39,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:39,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:39,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:39,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:11:39,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446631461] [2020-10-29 09:11:39,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:39,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:39,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007343041] [2020-10-29 09:11:39,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:39,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:39,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:39,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:39,426 INFO L87 Difference]: Start difference. First operand 259 states and 321 transitions. Second operand 13 states. [2020-10-29 09:11:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:40,859 INFO L93 Difference]: Finished difference Result 439 states and 553 transitions. [2020-10-29 09:11:40,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:40,859 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-29 09:11:40,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:40,862 INFO L225 Difference]: With dead ends: 439 [2020-10-29 09:11:40,862 INFO L226 Difference]: Without dead ends: 350 [2020-10-29 09:11:40,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-29 09:11:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 292. [2020-10-29 09:11:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-29 09:11:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 361 transitions. [2020-10-29 09:11:40,901 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 361 transitions. Word has length 41 [2020-10-29 09:11:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:40,901 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 361 transitions. [2020-10-29 09:11:40,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 361 transitions. [2020-10-29 09:11:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:11:40,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:40,903 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:40,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:11:40,903 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1669755901, now seen corresponding path program 1 times [2020-10-29 09:11:40,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:40,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654610681] [2020-10-29 09:11:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:40,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:41,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:41,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:11:41,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:41,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-29 09:11:41,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:41,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:41,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:41,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:41,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:11:41,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:42,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:42,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:42,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654610681] [2020-10-29 09:11:42,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:42,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:42,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166425942] [2020-10-29 09:11:42,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:42,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:42,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:42,430 INFO L87 Difference]: Start difference. First operand 292 states and 361 transitions. Second operand 14 states. [2020-10-29 09:11:42,994 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-29 09:11:43,147 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-29 09:11:43,374 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 69 [2020-10-29 09:11:43,605 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-29 09:11:43,798 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-29 09:11:44,008 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-29 09:11:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:44,817 INFO L93 Difference]: Finished difference Result 455 states and 570 transitions. [2020-10-29 09:11:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:44,818 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-29 09:11:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:44,821 INFO L225 Difference]: With dead ends: 455 [2020-10-29 09:11:44,821 INFO L226 Difference]: Without dead ends: 369 [2020-10-29 09:11:44,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:11:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-29 09:11:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 296. [2020-10-29 09:11:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-29 09:11:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 364 transitions. [2020-10-29 09:11:44,855 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 364 transitions. Word has length 41 [2020-10-29 09:11:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:44,856 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 364 transitions. [2020-10-29 09:11:44,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 364 transitions. [2020-10-29 09:11:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:11:44,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:44,857 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:44,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:11:44,857 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:44,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash -782315329, now seen corresponding path program 4 times [2020-10-29 09:11:44,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:44,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379721183] [2020-10-29 09:11:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:44,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:45,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:11:45,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:45,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1063 [2020-10-29 09:11:45,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:45,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:45,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:45,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:46,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 09:11:46,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379721183] [2020-10-29 09:11:46,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:46,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:46,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071499790] [2020-10-29 09:11:46,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:46,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:46,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:46,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:46,277 INFO L87 Difference]: Start difference. First operand 296 states and 364 transitions. Second operand 10 states. [2020-10-29 09:11:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:47,102 INFO L93 Difference]: Finished difference Result 408 states and 507 transitions. [2020-10-29 09:11:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:11:47,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-29 09:11:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:47,104 INFO L225 Difference]: With dead ends: 408 [2020-10-29 09:11:47,104 INFO L226 Difference]: Without dead ends: 333 [2020-10-29 09:11:47,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-29 09:11:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 282. [2020-10-29 09:11:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-29 09:11:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 346 transitions. [2020-10-29 09:11:47,139 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 346 transitions. Word has length 41 [2020-10-29 09:11:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:47,139 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 346 transitions. [2020-10-29 09:11:47,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 346 transitions. [2020-10-29 09:11:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:11:47,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:47,140 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:47,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:11:47,141 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:47,141 INFO L82 PathProgramCache]: Analyzing trace with hash -257052016, now seen corresponding path program 2 times [2020-10-29 09:11:47,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:47,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279702154] [2020-10-29 09:11:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:47,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:52,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:11:52,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-29 09:11:52,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 09:11:52,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:52,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:52,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:52,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:11:52,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:52,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:52,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:52,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:52,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:52,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:52,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:52,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:52,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:52,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279702154] [2020-10-29 09:11:52,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:52,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:52,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114564245] [2020-10-29 09:11:52,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:52,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:52,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:52,645 INFO L87 Difference]: Start difference. First operand 282 states and 346 transitions. Second operand 13 states. [2020-10-29 09:11:53,180 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-29 09:11:53,421 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-29 09:11:53,665 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-29 09:11:53,915 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-29 09:11:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:54,307 INFO L93 Difference]: Finished difference Result 358 states and 440 transitions. [2020-10-29 09:11:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:11:54,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-29 09:11:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:54,309 INFO L225 Difference]: With dead ends: 358 [2020-10-29 09:11:54,310 INFO L226 Difference]: Without dead ends: 337 [2020-10-29 09:11:54,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-29 09:11:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 312. [2020-10-29 09:11:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-29 09:11:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 381 transitions. [2020-10-29 09:11:54,352 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 381 transitions. Word has length 43 [2020-10-29 09:11:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:54,352 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 381 transitions. [2020-10-29 09:11:54,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 381 transitions. [2020-10-29 09:11:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:11:54,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:54,354 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:54,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:11:54,354 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:54,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1492519244, now seen corresponding path program 1 times [2020-10-29 09:11:54,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:54,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009800840] [2020-10-29 09:11:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:54,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:54,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:55,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:55,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:55,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:11:55,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:55,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-29 09:11:55,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:55,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:55,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:55,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:55,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:11:55,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:56,517 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-10-29 09:11:56,652 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-29 09:11:56,794 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-29 09:11:57,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:57,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:57,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:57,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:57,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:57,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:57,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:57,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:57,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:11:57,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009800840] [2020-10-29 09:11:57,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:57,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:57,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197353870] [2020-10-29 09:11:57,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:57,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:57,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:57,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:57,080 INFO L87 Difference]: Start difference. First operand 312 states and 381 transitions. Second operand 12 states. [2020-10-29 09:11:57,508 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 75 [2020-10-29 09:11:57,858 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 81 [2020-10-29 09:11:58,115 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 62 [2020-10-29 09:11:59,316 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 170 DAG size of output: 103 [2020-10-29 09:12:00,295 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 99 [2020-10-29 09:12:00,852 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2020-10-29 09:12:01,265 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2020-10-29 09:12:01,670 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 101 [2020-10-29 09:12:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:02,088 INFO L93 Difference]: Finished difference Result 343 states and 417 transitions. [2020-10-29 09:12:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:12:02,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-29 09:12:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:02,090 INFO L225 Difference]: With dead ends: 343 [2020-10-29 09:12:02,090 INFO L226 Difference]: Without dead ends: 330 [2020-10-29 09:12:02,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:12:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-29 09:12:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 314. [2020-10-29 09:12:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-29 09:12:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 383 transitions. [2020-10-29 09:12:02,127 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 383 transitions. Word has length 43 [2020-10-29 09:12:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:02,128 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 383 transitions. [2020-10-29 09:12:02,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 383 transitions. [2020-10-29 09:12:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:12:02,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:02,129 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:02,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:12:02,129 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:02,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:02,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1669080636, now seen corresponding path program 5 times [2020-10-29 09:12:02,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:02,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153925920] [2020-10-29 09:12:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:02,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:03,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:12:03,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-29 09:12:03,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:03,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:12:03,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:03,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:03,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:03,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:03,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:03,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:03,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:12:03,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153925920] [2020-10-29 09:12:03,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:03,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:03,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550201266] [2020-10-29 09:12:03,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:03,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:03,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:03,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:03,497 INFO L87 Difference]: Start difference. First operand 314 states and 383 transitions. Second operand 13 states. [2020-10-29 09:12:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:04,765 INFO L93 Difference]: Finished difference Result 593 states and 739 transitions. [2020-10-29 09:12:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:12:04,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-29 09:12:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:04,768 INFO L225 Difference]: With dead ends: 593 [2020-10-29 09:12:04,768 INFO L226 Difference]: Without dead ends: 445 [2020-10-29 09:12:04,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-29 09:12:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 390. [2020-10-29 09:12:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-29 09:12:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 476 transitions. [2020-10-29 09:12:04,816 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 476 transitions. Word has length 43 [2020-10-29 09:12:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:04,817 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 476 transitions. [2020-10-29 09:12:04,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 476 transitions. [2020-10-29 09:12:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:12:04,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:04,818 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-29 09:12:04,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:12:04,818 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:04,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2126216604, now seen corresponding path program 2 times [2020-10-29 09:12:04,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:04,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256867407] [2020-10-29 09:12:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:04,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:05,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:07,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:12:07,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2667 [2020-10-29 09:12:07,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:07,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:12:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:12:07,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:07,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:07,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:07,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:07,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:07,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:07,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:07,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:07,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:07,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:07,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:07,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:07,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256867407] [2020-10-29 09:12:07,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:07,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:12:07,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992672902] [2020-10-29 09:12:07,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:12:07,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:12:07,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:12:07,656 INFO L87 Difference]: Start difference. First operand 390 states and 476 transitions. Second operand 11 states. [2020-10-29 09:12:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:08,556 INFO L93 Difference]: Finished difference Result 758 states and 948 transitions. [2020-10-29 09:12:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:08,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-29 09:12:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:08,561 INFO L225 Difference]: With dead ends: 758 [2020-10-29 09:12:08,562 INFO L226 Difference]: Without dead ends: 516 [2020-10-29 09:12:08,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-29 09:12:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 395. [2020-10-29 09:12:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-29 09:12:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 489 transitions. [2020-10-29 09:12:08,597 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 489 transitions. Word has length 44 [2020-10-29 09:12:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:08,598 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 489 transitions. [2020-10-29 09:12:08,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 489 transitions. [2020-10-29 09:12:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:12:08,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:08,599 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:08,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:12:08,599 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash 562822771, now seen corresponding path program 1 times [2020-10-29 09:12:08,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:08,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887370178] [2020-10-29 09:12:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:08,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:09,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:09,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:12:09,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:09,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-29 09:12:09,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:09,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:09,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:09,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:12:09,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:09,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:09,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:09,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:09,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:09,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:09,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:09,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:09,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:09,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:09,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:09,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:09,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:12:09,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887370178] [2020-10-29 09:12:09,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:09,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:09,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912470829] [2020-10-29 09:12:09,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:09,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:09,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:09,925 INFO L87 Difference]: Start difference. First operand 395 states and 489 transitions. Second operand 13 states. [2020-10-29 09:12:10,792 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-29 09:12:11,056 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-29 09:12:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:11,853 INFO L93 Difference]: Finished difference Result 716 states and 903 transitions. [2020-10-29 09:12:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:12:11,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-29 09:12:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:11,856 INFO L225 Difference]: With dead ends: 716 [2020-10-29 09:12:11,856 INFO L226 Difference]: Without dead ends: 579 [2020-10-29 09:12:11,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:12:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-29 09:12:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 442. [2020-10-29 09:12:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-29 09:12:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 546 transitions. [2020-10-29 09:12:11,916 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 546 transitions. Word has length 44 [2020-10-29 09:12:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:11,916 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 546 transitions. [2020-10-29 09:12:11,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 546 transitions. [2020-10-29 09:12:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:12:11,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:11,917 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 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] [2020-10-29 09:12:11,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:12:11,918 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1431321935, now seen corresponding path program 1 times [2020-10-29 09:12:11,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:11,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228616573] [2020-10-29 09:12:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:11,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:12:12,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:13,213 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-29 09:12:13,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:13,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:13,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:13,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228616573] [2020-10-29 09:12:13,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:13,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:13,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489481138] [2020-10-29 09:12:13,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:13,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:13,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:13,596 INFO L87 Difference]: Start difference. First operand 442 states and 546 transitions. Second operand 15 states. [2020-10-29 09:12:14,164 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-10-29 09:12:14,329 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-29 09:12:14,540 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-10-29 09:12:14,808 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-29 09:12:15,041 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-10-29 09:12:15,258 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-29 09:12:15,474 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-29 09:12:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:16,364 INFO L93 Difference]: Finished difference Result 641 states and 804 transitions. [2020-10-29 09:12:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:12:16,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-29 09:12:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:16,368 INFO L225 Difference]: With dead ends: 641 [2020-10-29 09:12:16,368 INFO L226 Difference]: Without dead ends: 484 [2020-10-29 09:12:16,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-29 09:12:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 441. [2020-10-29 09:12:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-29 09:12:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 542 transitions. [2020-10-29 09:12:16,414 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 542 transitions. Word has length 44 [2020-10-29 09:12:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:16,414 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 542 transitions. [2020-10-29 09:12:16,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 542 transitions. [2020-10-29 09:12:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:12:16,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:16,416 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2020-10-29 09:12:16,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:12:16,416 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:16,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1829820704, now seen corresponding path program 1 times [2020-10-29 09:12:16,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:16,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678608964] [2020-10-29 09:12:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:16,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:16,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:17,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:18,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:18,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:12:18,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2139 [2020-10-29 09:12:18,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:18,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:12:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:18,885 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-29 09:12:19,214 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-29 09:12:19,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:19,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:19,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:19,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:19,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:19,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:19,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:19,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:19,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:19,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678608964] [2020-10-29 09:12:19,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:19,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:19,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444939954] [2020-10-29 09:12:19,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:19,742 INFO L87 Difference]: Start difference. First operand 441 states and 542 transitions. Second operand 14 states. [2020-10-29 09:12:20,136 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 69 [2020-10-29 09:12:20,393 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2020-10-29 09:12:20,574 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-29 09:12:20,889 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2020-10-29 09:12:21,187 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-29 09:12:21,420 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-29 09:12:21,984 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-29 09:12:22,416 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 58 [2020-10-29 09:12:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:23,085 INFO L93 Difference]: Finished difference Result 473 states and 576 transitions. [2020-10-29 09:12:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:12:23,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-29 09:12:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:23,089 INFO L225 Difference]: With dead ends: 473 [2020-10-29 09:12:23,090 INFO L226 Difference]: Without dead ends: 460 [2020-10-29 09:12:23,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:12:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-29 09:12:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 445. [2020-10-29 09:12:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-10-29 09:12:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 546 transitions. [2020-10-29 09:12:23,142 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 546 transitions. Word has length 45 [2020-10-29 09:12:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:23,142 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 546 transitions. [2020-10-29 09:12:23,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 546 transitions. [2020-10-29 09:12:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:12:23,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:23,143 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:23,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:12:23,144 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:23,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:23,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1865613075, now seen corresponding path program 2 times [2020-10-29 09:12:23,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:23,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612071798] [2020-10-29 09:12:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:23,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:24,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:25,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:25,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:12:25,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:25,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2189 [2020-10-29 09:12:25,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:25,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:25,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:25,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:25,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:12:25,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:25,808 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 09:12:25,969 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-29 09:12:26,134 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-29 09:12:27,859 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 271 DAG size of output: 110 [2020-10-29 09:12:28,210 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-29 09:12:28,588 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-29 09:12:28,877 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-29 09:12:29,188 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2020-10-29 09:12:29,439 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2020-10-29 09:12:29,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:29,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:29,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:29,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:29,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:29,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:29,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:29,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:29,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:29,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:29,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:12:29,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612071798] [2020-10-29 09:12:29,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:29,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639867695] [2020-10-29 09:12:29,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:29,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:29,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:29,896 INFO L87 Difference]: Start difference. First operand 445 states and 546 transitions. Second operand 16 states. [2020-10-29 09:12:30,521 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 87 [2020-10-29 09:12:30,810 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-29 09:12:31,019 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-29 09:12:32,032 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 145 [2020-10-29 09:12:32,444 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 84 [2020-10-29 09:12:33,327 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 125 [2020-10-29 09:12:33,781 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 95 [2020-10-29 09:12:34,499 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 110 [2020-10-29 09:12:34,970 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 85 [2020-10-29 09:12:35,824 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 124 [2020-10-29 09:12:36,410 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 92 [2020-10-29 09:12:37,242 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 121 [2020-10-29 09:12:37,527 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-29 09:12:38,453 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 112 [2020-10-29 09:12:38,936 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-29 09:12:39,326 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-29 09:12:39,572 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-29 09:12:40,150 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-10-29 09:12:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:40,218 INFO L93 Difference]: Finished difference Result 478 states and 581 transitions. [2020-10-29 09:12:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:12:40,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-29 09:12:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:40,222 INFO L225 Difference]: With dead ends: 478 [2020-10-29 09:12:40,223 INFO L226 Difference]: Without dead ends: 474 [2020-10-29 09:12:40,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:12:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-29 09:12:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 459. [2020-10-29 09:12:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-29 09:12:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 561 transitions. [2020-10-29 09:12:40,278 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 561 transitions. Word has length 45 [2020-10-29 09:12:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:40,279 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 561 transitions. [2020-10-29 09:12:40,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 561 transitions. [2020-10-29 09:12:40,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:12:40,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:40,280 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:40,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:12:40,281 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash 453584455, now seen corresponding path program 2 times [2020-10-29 09:12:40,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:40,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637734198] [2020-10-29 09:12:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:40,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:40,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:40,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:12:40,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:40,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-29 09:12:40,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:40,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:40,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:40,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:40,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:12:40,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:41,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:41,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:41,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:41,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:41,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:41,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:41,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:41,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:41,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:41,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:41,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:41,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:12:41,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637734198] [2020-10-29 09:12:41,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:41,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:41,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120930520] [2020-10-29 09:12:41,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:41,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:41,286 INFO L87 Difference]: Start difference. First operand 459 states and 561 transitions. Second operand 14 states. [2020-10-29 09:12:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:42,978 INFO L93 Difference]: Finished difference Result 746 states and 933 transitions. [2020-10-29 09:12:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:42,981 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-29 09:12:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:42,983 INFO L225 Difference]: With dead ends: 746 [2020-10-29 09:12:42,983 INFO L226 Difference]: Without dead ends: 609 [2020-10-29 09:12:42,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-10-29 09:12:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 508. [2020-10-29 09:12:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-29 09:12:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 625 transitions. [2020-10-29 09:12:43,056 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 625 transitions. Word has length 45 [2020-10-29 09:12:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:43,056 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 625 transitions. [2020-10-29 09:12:43,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 625 transitions. [2020-10-29 09:12:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:12:43,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:43,057 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 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] [2020-10-29 09:12:43,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:12:43,058 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1940931152, now seen corresponding path program 2 times [2020-10-29 09:12:43,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:43,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64929401] [2020-10-29 09:12:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:43,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:43,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:43,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:12:43,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-29 09:12:43,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:43,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:12:43,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:44,070 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-29 09:12:44,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:44,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:44,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:12:44,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64929401] [2020-10-29 09:12:44,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:44,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:44,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268374429] [2020-10-29 09:12:44,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:44,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:44,403 INFO L87 Difference]: Start difference. First operand 508 states and 625 transitions. Second operand 15 states. [2020-10-29 09:12:46,007 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-29 09:12:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:46,473 INFO L93 Difference]: Finished difference Result 1052 states and 1325 transitions. [2020-10-29 09:12:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:46,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-29 09:12:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:46,479 INFO L225 Difference]: With dead ends: 1052 [2020-10-29 09:12:46,479 INFO L226 Difference]: Without dead ends: 859 [2020-10-29 09:12:46,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-10-29 09:12:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 675. [2020-10-29 09:12:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-10-29 09:12:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 835 transitions. [2020-10-29 09:12:46,548 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 835 transitions. Word has length 46 [2020-10-29 09:12:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:46,548 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 835 transitions. [2020-10-29 09:12:46,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 835 transitions. [2020-10-29 09:12:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:12:46,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:46,550 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:46,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:12:46,550 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:46,550 INFO L82 PathProgramCache]: Analyzing trace with hash -53213554, now seen corresponding path program 1 times [2020-10-29 09:12:46,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:46,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449124438] [2020-10-29 09:12:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:46,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:47,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:12:47,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:47,751 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-29 09:12:48,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:48,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:48,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:48,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:48,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:48,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:48,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:48,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:48,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:48,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449124438] [2020-10-29 09:12:48,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:48,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:48,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795264128] [2020-10-29 09:12:48,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:48,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:48,271 INFO L87 Difference]: Start difference. First operand 675 states and 835 transitions. Second operand 16 states. [2020-10-29 09:12:48,749 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-29 09:12:49,003 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-29 09:12:49,151 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-29 09:12:49,375 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-29 09:12:49,578 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-29 09:12:49,796 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2020-10-29 09:12:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:51,039 INFO L93 Difference]: Finished difference Result 1163 states and 1462 transitions. [2020-10-29 09:12:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:51,039 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-29 09:12:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:51,044 INFO L225 Difference]: With dead ends: 1163 [2020-10-29 09:12:51,044 INFO L226 Difference]: Without dead ends: 1026 [2020-10-29 09:12:51,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-10-29 09:12:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 800. [2020-10-29 09:12:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-10-29 09:12:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 995 transitions. [2020-10-29 09:12:51,126 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 995 transitions. Word has length 46 [2020-10-29 09:12:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:51,126 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 995 transitions. [2020-10-29 09:12:51,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 995 transitions. [2020-10-29 09:12:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:12:51,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:51,128 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 09:12:51,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:12:51,129 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash -183985616, now seen corresponding path program 1 times [2020-10-29 09:12:51,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:51,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422876297] [2020-10-29 09:12:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:51,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:52,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:52,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:12:52,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:52,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1659 [2020-10-29 09:12:52,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:52,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:12:52,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:53,381 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-29 09:12:53,539 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-29 09:12:54,004 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 55 [2020-10-29 09:12:54,295 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-29 09:12:54,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:54,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:54,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:54,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422876297] [2020-10-29 09:12:54,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:54,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674047807] [2020-10-29 09:12:54,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:54,723 INFO L87 Difference]: Start difference. First operand 800 states and 995 transitions. Second operand 16 states. [2020-10-29 09:12:55,391 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-29 09:12:55,559 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2020-10-29 09:12:55,720 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2020-10-29 09:12:55,958 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 50 [2020-10-29 09:12:56,200 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 46 [2020-10-29 09:12:56,559 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2020-10-29 09:12:56,894 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-29 09:12:58,233 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2020-10-29 09:12:58,986 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 87 [2020-10-29 09:12:59,651 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-29 09:13:00,336 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 105 [2020-10-29 09:13:00,606 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-29 09:13:00,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:00,775 INFO L93 Difference]: Finished difference Result 914 states and 1133 transitions. [2020-10-29 09:13:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:13:00,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-29 09:13:00,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:00,778 INFO L225 Difference]: With dead ends: 914 [2020-10-29 09:13:00,778 INFO L226 Difference]: Without dead ends: 910 [2020-10-29 09:13:00,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:13:00,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-10-29 09:13:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 827. [2020-10-29 09:13:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-10-29 09:13:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1026 transitions. [2020-10-29 09:13:00,867 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1026 transitions. Word has length 47 [2020-10-29 09:13:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:00,867 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1026 transitions. [2020-10-29 09:13:00,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1026 transitions. [2020-10-29 09:13:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:13:00,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:00,869 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] [2020-10-29 09:13:00,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:13:00,870 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1371247888, now seen corresponding path program 1 times [2020-10-29 09:13:00,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:00,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714467224] [2020-10-29 09:13:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:00,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:01,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:01,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:13:01,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:01,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-29 09:13:01,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:01,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:01,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:01,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:01,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:13:01,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:02,025 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-29 09:13:02,260 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-29 09:13:02,388 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-29 09:13:02,713 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-29 09:13:02,898 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-29 09:13:03,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:03,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:03,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:03,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:03,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:03,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:03,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:03,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:03,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:03,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:03,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:03,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:03,353 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 09:13:03,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714467224] [2020-10-29 09:13:03,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:03,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:03,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155143238] [2020-10-29 09:13:03,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:03,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:03,355 INFO L87 Difference]: Start difference. First operand 827 states and 1026 transitions. Second operand 16 states. [2020-10-29 09:13:03,885 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2020-10-29 09:13:04,080 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-29 09:13:04,455 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-29 09:13:04,785 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-29 09:13:04,979 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-29 09:13:05,366 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-29 09:13:05,760 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-29 09:13:06,276 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-10-29 09:13:06,551 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-29 09:13:06,839 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-29 09:13:07,274 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-29 09:13:07,530 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-29 09:13:07,941 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-29 09:13:08,502 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:13:08,908 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-29 09:13:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:09,474 INFO L93 Difference]: Finished difference Result 1069 states and 1332 transitions. [2020-10-29 09:13:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:13:09,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-29 09:13:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:09,478 INFO L225 Difference]: With dead ends: 1069 [2020-10-29 09:13:09,478 INFO L226 Difference]: Without dead ends: 1065 [2020-10-29 09:13:09,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:13:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2020-10-29 09:13:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 875. [2020-10-29 09:13:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 875 states. [2020-10-29 09:13:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1088 transitions. [2020-10-29 09:13:09,577 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1088 transitions. Word has length 47 [2020-10-29 09:13:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:09,577 INFO L481 AbstractCegarLoop]: Abstraction has 875 states and 1088 transitions. [2020-10-29 09:13:09,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1088 transitions. [2020-10-29 09:13:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:13:09,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:09,579 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] [2020-10-29 09:13:09,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:13:09,579 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:09,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1505261394, now seen corresponding path program 1 times [2020-10-29 09:13:09,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:09,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870576726] [2020-10-29 09:13:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:09,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:10,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:12,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:12,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2735 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:12,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:12,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:12,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:12,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:12,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:12,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:12,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:12,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:12,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:12,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:12,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:12,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:12,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870576726] [2020-10-29 09:13:12,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:12,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:13:12,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424558584] [2020-10-29 09:13:12,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:13:12,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:12,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:13:12,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:13:12,717 INFO L87 Difference]: Start difference. First operand 875 states and 1088 transitions. Second operand 13 states. [2020-10-29 09:13:13,254 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-29 09:13:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:14,207 INFO L93 Difference]: Finished difference Result 1268 states and 1586 transitions. [2020-10-29 09:13:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:13:14,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-29 09:13:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:14,210 INFO L225 Difference]: With dead ends: 1268 [2020-10-29 09:13:14,210 INFO L226 Difference]: Without dead ends: 819 [2020-10-29 09:13:14,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:13:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-29 09:13:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 768. [2020-10-29 09:13:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-10-29 09:13:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 952 transitions. [2020-10-29 09:13:14,299 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 952 transitions. Word has length 47 [2020-10-29 09:13:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:14,299 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 952 transitions. [2020-10-29 09:13:14,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:13:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 952 transitions. [2020-10-29 09:13:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:14,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:14,301 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 09:13:14,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:13:14,301 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash 299867017, now seen corresponding path program 1 times [2020-10-29 09:13:14,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:14,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956288951] [2020-10-29 09:13:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:14,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:14,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:14,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:14,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:15,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:15,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:16,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:19,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4783 [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:13:19,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:19,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:19,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:19,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:19,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956288951] [2020-10-29 09:13:19,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:19,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:13:19,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985570465] [2020-10-29 09:13:19,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:13:19,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:19,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:13:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:13:19,630 INFO L87 Difference]: Start difference. First operand 768 states and 952 transitions. Second operand 12 states. [2020-10-29 09:13:20,062 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-29 09:13:20,466 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-29 09:13:20,691 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-29 09:13:20,833 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-29 09:13:21,024 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-29 09:13:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:21,233 INFO L93 Difference]: Finished difference Result 1007 states and 1244 transitions. [2020-10-29 09:13:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:13:21,234 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 09:13:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:21,237 INFO L225 Difference]: With dead ends: 1007 [2020-10-29 09:13:21,237 INFO L226 Difference]: Without dead ends: 920 [2020-10-29 09:13:21,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:13:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-10-29 09:13:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 819. [2020-10-29 09:13:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-10-29 09:13:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1007 transitions. [2020-10-29 09:13:21,317 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1007 transitions. Word has length 48 [2020-10-29 09:13:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:21,317 INFO L481 AbstractCegarLoop]: Abstraction has 819 states and 1007 transitions. [2020-10-29 09:13:21,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:13:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1007 transitions. [2020-10-29 09:13:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:21,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:21,319 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 09:13:21,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:13:21,320 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:21,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1909695863, now seen corresponding path program 2 times [2020-10-29 09:13:21,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:21,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254931673] [2020-10-29 09:13:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:21,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:21,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:21,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:22,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:23,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:24,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3393 [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:13:24,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:25,206 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-29 09:13:25,377 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2020-10-29 09:13:25,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:25,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:25,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:25,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:25,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:25,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:13:25,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:25,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:25,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:25,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:25,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:25,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:25,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254931673] [2020-10-29 09:13:25,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:25,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:13:25,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042672923] [2020-10-29 09:13:25,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:13:25,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:25,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:13:25,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:13:25,713 INFO L87 Difference]: Start difference. First operand 819 states and 1007 transitions. Second operand 13 states. [2020-10-29 09:13:26,559 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-29 09:13:26,703 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-29 09:13:27,118 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-29 09:13:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:27,712 INFO L93 Difference]: Finished difference Result 991 states and 1220 transitions. [2020-10-29 09:13:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:13:27,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-29 09:13:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:27,716 INFO L225 Difference]: With dead ends: 991 [2020-10-29 09:13:27,716 INFO L226 Difference]: Without dead ends: 867 [2020-10-29 09:13:27,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=232, Invalid=524, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-10-29 09:13:27,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 830. [2020-10-29 09:13:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2020-10-29 09:13:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1017 transitions. [2020-10-29 09:13:27,798 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1017 transitions. Word has length 48 [2020-10-29 09:13:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:27,798 INFO L481 AbstractCegarLoop]: Abstraction has 830 states and 1017 transitions. [2020-10-29 09:13:27,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:13:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1017 transitions. [2020-10-29 09:13:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:27,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:27,800 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:27,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:13:27,800 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash 514743964, now seen corresponding path program 2 times [2020-10-29 09:13:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:27,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574047796] [2020-10-29 09:13:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:28,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:30,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:30,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:30,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:30,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2592 [2020-10-29 09:13:30,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:30,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:13:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:13:30,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:30,684 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-29 09:13:30,892 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-29 09:13:31,041 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-29 09:13:31,212 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-29 09:13:31,376 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-29 09:13:31,520 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-29 09:13:31,676 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-29 09:13:32,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:32,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:32,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:13:32,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574047796] [2020-10-29 09:13:32,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:32,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:13:32,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045830753] [2020-10-29 09:13:32,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:13:32,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:13:32,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:13:32,127 INFO L87 Difference]: Start difference. First operand 830 states and 1017 transitions. Second operand 14 states. [2020-10-29 09:13:32,542 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-29 09:13:32,866 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-10-29 09:13:33,074 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-29 09:13:33,515 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 111 [2020-10-29 09:13:33,964 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-10-29 09:13:34,423 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 98 [2020-10-29 09:13:34,926 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2020-10-29 09:13:35,278 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-29 09:13:35,663 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-29 09:13:36,417 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-29 09:13:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:36,547 INFO L93 Difference]: Finished difference Result 855 states and 1044 transitions. [2020-10-29 09:13:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:13:36,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-29 09:13:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:36,551 INFO L225 Difference]: With dead ends: 855 [2020-10-29 09:13:36,552 INFO L226 Difference]: Without dead ends: 842 [2020-10-29 09:13:36,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-10-29 09:13:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 830. [2020-10-29 09:13:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2020-10-29 09:13:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1017 transitions. [2020-10-29 09:13:36,636 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1017 transitions. Word has length 48 [2020-10-29 09:13:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:36,636 INFO L481 AbstractCegarLoop]: Abstraction has 830 states and 1017 transitions. [2020-10-29 09:13:36,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:13:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1017 transitions. [2020-10-29 09:13:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:36,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:36,638 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-29 09:13:36,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:13:36,638 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:36,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1731886175, now seen corresponding path program 1 times [2020-10-29 09:13:36,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:36,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081684810] [2020-10-29 09:13:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:36,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:36,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:37,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:37,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:41,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:41,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:41,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:13:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4719 [2020-10-29 09:13:41,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:41,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:13:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:13:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:41,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:41,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:41,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:41,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:41,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081684810] [2020-10-29 09:13:41,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:41,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:13:41,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487897391] [2020-10-29 09:13:41,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:13:41,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:13:41,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:13:41,701 INFO L87 Difference]: Start difference. First operand 830 states and 1017 transitions. Second operand 13 states. [2020-10-29 09:13:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:42,894 INFO L93 Difference]: Finished difference Result 1024 states and 1267 transitions. [2020-10-29 09:13:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:13:42,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-29 09:13:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:42,897 INFO L225 Difference]: With dead ends: 1024 [2020-10-29 09:13:42,897 INFO L226 Difference]: Without dead ends: 717 [2020-10-29 09:13:42,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:13:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2020-10-29 09:13:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 686. [2020-10-29 09:13:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2020-10-29 09:13:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 842 transitions. [2020-10-29 09:13:42,969 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 842 transitions. Word has length 48 [2020-10-29 09:13:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:42,969 INFO L481 AbstractCegarLoop]: Abstraction has 686 states and 842 transitions. [2020-10-29 09:13:42,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:13:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 842 transitions. [2020-10-29 09:13:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:13:42,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:42,970 INFO L422 BasicCegarLoop]: trace histogram [3, 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 09:13:42,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:13:42,971 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash 7962059, now seen corresponding path program 1 times [2020-10-29 09:13:42,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:42,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559317999] [2020-10-29 09:13:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:43,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:44,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:45,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:45,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:13:45,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:13:45,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2678 [2020-10-29 09:13:45,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:45,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:45,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:13:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:13:45,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:45,985 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-29 09:13:46,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:46,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:46,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:46,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:46,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:46,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:46,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:46,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559317999] [2020-10-29 09:13:46,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:46,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:13:46,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686679631] [2020-10-29 09:13:46,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:13:46,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:13:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:13:46,333 INFO L87 Difference]: Start difference. First operand 686 states and 842 transitions. Second operand 12 states. [2020-10-29 09:13:47,108 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-29 09:13:47,366 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-29 09:13:47,518 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-29 09:13:47,986 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-29 09:13:48,201 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-29 09:13:48,432 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-29 09:13:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:48,651 INFO L93 Difference]: Finished difference Result 857 states and 1052 transitions. [2020-10-29 09:13:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:13:48,652 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-29 09:13:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:48,654 INFO L225 Difference]: With dead ends: 857 [2020-10-29 09:13:48,655 INFO L226 Difference]: Without dead ends: 774 [2020-10-29 09:13:48,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:13:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-29 09:13:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 705. [2020-10-29 09:13:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2020-10-29 09:13:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 862 transitions. [2020-10-29 09:13:48,735 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 862 transitions. Word has length 49 [2020-10-29 09:13:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:48,735 INFO L481 AbstractCegarLoop]: Abstraction has 705 states and 862 transitions. [2020-10-29 09:13:48,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:13:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 862 transitions. [2020-10-29 09:13:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:13:48,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:48,737 INFO L422 BasicCegarLoop]: trace histogram [4, 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 09:13:48,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:13:48,737 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:48,738 INFO L82 PathProgramCache]: Analyzing trace with hash 983045939, now seen corresponding path program 2 times [2020-10-29 09:13:48,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:48,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520240606] [2020-10-29 09:13:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:48,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:49,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:49,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:13:49,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:49,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-29 09:13:49,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:49,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:13:49,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:50,235 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-29 09:13:50,376 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-29 09:13:50,549 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-29 09:13:50,857 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-29 09:13:51,011 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-29 09:13:51,322 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2020-10-29 09:13:51,482 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-29 09:13:51,730 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-29 09:13:52,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:52,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:52,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:52,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:52,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:52,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:52,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:52,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:52,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:52,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:52,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:52,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:52,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520240606] [2020-10-29 09:13:52,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:52,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:52,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488083061] [2020-10-29 09:13:52,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:52,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:52,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:52,242 INFO L87 Difference]: Start difference. First operand 705 states and 862 transitions. Second operand 17 states. [2020-10-29 09:13:52,969 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 84 [2020-10-29 09:13:53,315 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2020-10-29 09:13:53,567 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-29 09:13:53,835 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 67 [2020-10-29 09:13:54,092 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2020-10-29 09:13:54,358 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 59 [2020-10-29 09:13:54,644 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-29 09:13:55,075 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 85 [2020-10-29 09:13:55,592 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 88 [2020-10-29 09:13:56,083 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-29 09:13:56,385 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-29 09:13:56,723 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-29 09:13:56,980 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:13:57,251 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-29 09:13:57,682 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-29 09:13:58,117 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-29 09:13:58,846 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-29 09:13:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:58,959 INFO L93 Difference]: Finished difference Result 754 states and 922 transitions. [2020-10-29 09:13:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:13:58,966 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-29 09:13:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:58,969 INFO L225 Difference]: With dead ends: 754 [2020-10-29 09:13:58,969 INFO L226 Difference]: Without dead ends: 750 [2020-10-29 09:13:58,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:13:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2020-10-29 09:13:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 711. [2020-10-29 09:13:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2020-10-29 09:13:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 870 transitions. [2020-10-29 09:13:59,041 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 870 transitions. Word has length 49 [2020-10-29 09:13:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:59,041 INFO L481 AbstractCegarLoop]: Abstraction has 711 states and 870 transitions. [2020-10-29 09:13:59,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 870 transitions. [2020-10-29 09:13:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:13:59,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:59,043 INFO L422 BasicCegarLoop]: trace histogram [4, 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 09:13:59,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:13:59,043 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:59,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1955096013, now seen corresponding path program 3 times [2020-10-29 09:13:59,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:59,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285191173] [2020-10-29 09:13:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:59,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:00,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4217 [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:03,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:14:03,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:03,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:03,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:03,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:03,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:03,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:03,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:14:03,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:03,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:03,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:03,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:03,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:03,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 09:14:03,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285191173] [2020-10-29 09:14:03,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:03,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:14:03,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868681857] [2020-10-29 09:14:03,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:14:03,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:03,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:14:03,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:14:03,964 INFO L87 Difference]: Start difference. First operand 711 states and 870 transitions. Second operand 13 states. [2020-10-29 09:14:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:05,218 INFO L93 Difference]: Finished difference Result 812 states and 1009 transitions. [2020-10-29 09:14:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:14:05,219 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-29 09:14:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:05,222 INFO L225 Difference]: With dead ends: 812 [2020-10-29 09:14:05,222 INFO L226 Difference]: Without dead ends: 808 [2020-10-29 09:14:05,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:14:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2020-10-29 09:14:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 721. [2020-10-29 09:14:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2020-10-29 09:14:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 885 transitions. [2020-10-29 09:14:05,287 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 885 transitions. Word has length 49 [2020-10-29 09:14:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:05,287 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 885 transitions. [2020-10-29 09:14:05,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:14:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 885 transitions. [2020-10-29 09:14:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:14:05,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:05,289 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2020-10-29 09:14:05,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:14:05,289 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:05,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1318281848, now seen corresponding path program 2 times [2020-10-29 09:14:05,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:05,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65355575] [2020-10-29 09:14:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:05,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:05,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:06,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:06,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:14:06,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:06,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 909 [2020-10-29 09:14:06,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:06,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:14:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:14:06,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:06,503 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-29 09:14:06,624 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-29 09:14:06,839 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-29 09:14:07,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:07,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:07,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:07,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:07,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:07,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:07,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:07,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:07,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:07,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:07,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:14:07,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65355575] [2020-10-29 09:14:07,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:07,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:14:07,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566996757] [2020-10-29 09:14:07,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:14:07,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:14:07,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:14:07,466 INFO L87 Difference]: Start difference. First operand 721 states and 885 transitions. Second operand 14 states. [2020-10-29 09:14:07,813 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-29 09:14:08,009 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-29 09:14:08,374 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-29 09:14:08,610 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-29 09:14:08,988 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 57 [2020-10-29 09:14:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:09,691 INFO L93 Difference]: Finished difference Result 738 states and 903 transitions. [2020-10-29 09:14:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:14:09,692 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-29 09:14:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:09,695 INFO L225 Difference]: With dead ends: 738 [2020-10-29 09:14:09,695 INFO L226 Difference]: Without dead ends: 691 [2020-10-29 09:14:09,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:14:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-10-29 09:14:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2020-10-29 09:14:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-29 09:14:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 853 transitions. [2020-10-29 09:14:09,749 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 853 transitions. Word has length 50 [2020-10-29 09:14:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:09,749 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 853 transitions. [2020-10-29 09:14:09,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:14:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 853 transitions. [2020-10-29 09:14:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:14:09,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:09,750 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:09,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:14:09,750 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:09,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1654696412, now seen corresponding path program 1 times [2020-10-29 09:14:09,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:09,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549591018] [2020-10-29 09:14:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:10,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:12,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking...