/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:05:07,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:05:07,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:05:07,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:05:07,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:05:07,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:05:07,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:05:07,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:05:07,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:05:07,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:05:07,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:05:07,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:05:07,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:05:07,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:05:07,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:05:07,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:05:07,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:05:07,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:05:07,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:05:07,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:05:07,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:05:07,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:05:07,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:05:07,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:05:07,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:05:07,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:05:07,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:05:07,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:05:07,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:05:07,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:05:07,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:05:07,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:05:07,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:05:07,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:05:07,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:05:07,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:05:07,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:05:07,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:05:07,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:05:07,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:05:07,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:05:07,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:05:07,703 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:05:07,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:05:07,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:05:07,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:05:07,705 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:05:07,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:05:07,706 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:05:07,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:05:07,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:05:07,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:05:07,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:05:07,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:05:07,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:05:07,707 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:05:07,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:05:07,707 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:05:07,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:05:07,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:05:07,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:05:07,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:05:07,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:05:07,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:07,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:05:07,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:05:07,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:05:07,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:05:07,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:05:07,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:05:07,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:05:07,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:05:08,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:05:08,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:05:08,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:05:08,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:05:08,115 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:05:08,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-2.i [2020-10-27 01:05:08,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87c580327/b9414e6727eb478bae5704c6eb4268db/FLAG48a5d989b [2020-10-27 01:05:09,006 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:05:09,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-2.i [2020-10-27 01:05:09,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87c580327/b9414e6727eb478bae5704c6eb4268db/FLAG48a5d989b [2020-10-27 01:05:09,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87c580327/b9414e6727eb478bae5704c6eb4268db [2020-10-27 01:05:09,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:05:09,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:05:09,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:09,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:05:09,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:05:09,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b28209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09, skipping insertion in model container [2020-10-27 01:05:09,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:05:09,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:05:09,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:09,746 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:05:09,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:09,905 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:05:09,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09 WrapperNode [2020-10-27 01:05:09,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:09,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:05:09,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:05:09,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:05:09,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (1/1) ... [2020-10-27 01:05:09,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:05:09,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:05:09,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:05:09,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:05:09,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:10,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:05:10,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:05:10,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:05:10,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:05:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:05:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:05:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:05:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:05:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:05:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:05:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:05:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:05:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:05:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:05:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:05:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:05:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:05:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:05:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:05:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:05:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:05:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:05:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:05:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:05:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:05:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:05:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:05:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:05:10,094 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:05:10,094 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:05:10,094 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:05:10,094 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:05:10,094 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:05:10,094 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:05:10,094 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:05:10,095 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:05:10,095 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:05:10,095 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:05:10,095 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:05:10,095 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:05:10,095 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:05:10,095 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:05:10,096 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:05:10,096 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:05:10,096 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:05:10,096 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:05:10,096 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:05:10,096 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:05:10,096 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:05:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:05:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:05:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:05:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:05:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:05:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:05:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:05:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:05:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:05:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:05:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:05:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:05:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:05:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:05:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:05:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:05:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:05:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:05:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:05:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:05:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:05:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:05:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:05:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:05:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:05:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:05:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:05:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:05:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:05:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:05:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:05:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:05:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:05:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:05:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:05:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:05:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:05:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:05:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:05:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:05:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:05:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:05:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:05:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:05:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:05:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:05:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:05:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:05:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:05:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:05:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:05:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:05:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:05:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:05:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:05:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:05:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:05:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:05:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:05:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:05:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:05:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:05:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:05:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:05:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:05:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:05:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:05:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:05:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:05:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:05:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:05:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:05:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:05:10,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:05:11,070 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:05:11,070 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-27 01:05:11,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:11 BoogieIcfgContainer [2020-10-27 01:05:11,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:05:11,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:05:11,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:05:11,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:05:11,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:05:09" (1/3) ... [2020-10-27 01:05:11,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f2ab1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:11, skipping insertion in model container [2020-10-27 01:05:11,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:09" (2/3) ... [2020-10-27 01:05:11,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f2ab1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:11, skipping insertion in model container [2020-10-27 01:05:11,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:11" (3/3) ... [2020-10-27 01:05:11,092 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-2.i [2020-10-27 01:05:11,106 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:05:11,112 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:05:11,126 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:05:11,168 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:05:11,169 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:05:11,169 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:05:11,169 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:05:11,175 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:05:11,176 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:05:11,176 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:05:11,176 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:05:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states. [2020-10-27 01:05:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 01:05:11,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:11,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:11,214 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:11,222 INFO L82 PathProgramCache]: Analyzing trace with hash 987864192, now seen corresponding path program 1 times [2020-10-27 01:05:11,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:11,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353630801] [2020-10-27 01:05:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:11,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:11,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:11,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:05:11,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:11,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-27 01:05:11,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:11,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:11,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:11,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:05:11,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:05:11,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:11,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:11,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:11,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 01:05:11,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:11,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:11,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:11,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:05:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:11,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353630801] [2020-10-27 01:05:11,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:11,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:11,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311719030] [2020-10-27 01:05:11,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:11,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:11,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:11,858 INFO L87 Difference]: Start difference. First operand 93 states. Second operand 4 states. [2020-10-27 01:05:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:12,155 INFO L93 Difference]: Finished difference Result 179 states and 324 transitions. [2020-10-27 01:05:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:12,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-27 01:05:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:12,168 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:05:12,168 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:05:12,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:05:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2020-10-27 01:05:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:05:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-10-27 01:05:12,224 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 10 [2020-10-27 01:05:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:12,225 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-10-27 01:05:12,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-10-27 01:05:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:12,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:12,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:12,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:05:12,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:12,228 INFO L82 PathProgramCache]: Analyzing trace with hash 496275789, now seen corresponding path program 1 times [2020-10-27 01:05:12,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:12,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649969767] [2020-10-27 01:05:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:12,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:12,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:12,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:12,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:12,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:12,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 01:05:12,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:12,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 47 [2020-10-27 01:05:12,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:12,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:12,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:12,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:12,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:12,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:05:12,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:12,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:12,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649969767] [2020-10-27 01:05:12,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:12,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:12,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840465615] [2020-10-27 01:05:12,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:12,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:12,662 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 5 states. [2020-10-27 01:05:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:13,100 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2020-10-27 01:05:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:13,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:05:13,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:13,103 INFO L225 Difference]: With dead ends: 178 [2020-10-27 01:05:13,104 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:05:13,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:13,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:05:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-27 01:05:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:05:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-10-27 01:05:13,120 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 16 [2020-10-27 01:05:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:13,120 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-10-27 01:05:13,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-10-27 01:05:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:13,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:13,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:13,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:05:13,122 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash 498122831, now seen corresponding path program 1 times [2020-10-27 01:05:13,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:13,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6106141] [2020-10-27 01:05:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:13,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:13,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:13,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:13,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:13,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:13,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 01:05:13,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:13,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:13,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:13,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:13,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:13,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:13,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:13,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:13,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:13,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:13,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:05:13,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:13,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:13,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:13,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:13,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:13,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6106141] [2020-10-27 01:05:13,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:13,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:13,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445648018] [2020-10-27 01:05:13,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:13,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:13,326 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 5 states. [2020-10-27 01:05:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:13,623 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2020-10-27 01:05:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:13,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:05:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:13,626 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:05:13,626 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:05:13,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:05:13,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 75. [2020-10-27 01:05:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:05:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2020-10-27 01:05:13,638 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 16 [2020-10-27 01:05:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:13,639 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2020-10-27 01:05:13,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2020-10-27 01:05:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:13,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:13,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:13,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:05:13,640 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2021837103, now seen corresponding path program 1 times [2020-10-27 01:05:13,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:13,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226927383] [2020-10-27 01:05:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:13,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:13,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:14,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:14,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:14,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 01:05:14,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:14,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:14,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:14,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:05:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:14,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:14,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:14,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:14,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:14,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:14,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:14,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:14,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:14,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:14,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226927383] [2020-10-27 01:05:14,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:14,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:14,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598098199] [2020-10-27 01:05:14,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:14,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:14,134 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand 6 states. [2020-10-27 01:05:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:14,670 INFO L93 Difference]: Finished difference Result 199 states and 256 transitions. [2020-10-27 01:05:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:14,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:05:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:14,673 INFO L225 Difference]: With dead ends: 199 [2020-10-27 01:05:14,674 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:05:14,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:05:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 73. [2020-10-27 01:05:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:05:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2020-10-27 01:05:14,687 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 16 [2020-10-27 01:05:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:14,687 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2020-10-27 01:05:14,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2020-10-27 01:05:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:05:14,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:14,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:14,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:05:14,689 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -127648352, now seen corresponding path program 1 times [2020-10-27 01:05:14,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:14,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153551710] [2020-10-27 01:05:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:14,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:05:14,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:14,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 01:05:14,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:05:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:05:14,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:14,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:14,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:14,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:14,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:14,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:05:14,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:14,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:14,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:14,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:14,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:14,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153551710] [2020-10-27 01:05:14,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:14,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:14,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586424839] [2020-10-27 01:05:14,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:14,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:14,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:14,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:14,935 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 4 states. [2020-10-27 01:05:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:15,144 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-27 01:05:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:15,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:05:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:15,146 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:05:15,146 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:05:15,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:05:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-27 01:05:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:05:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-27 01:05:15,168 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 21 [2020-10-27 01:05:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:15,169 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-27 01:05:15,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-27 01:05:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:05:15,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:15,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:15,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:05:15,171 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash 334207909, now seen corresponding path program 1 times [2020-10-27 01:05:15,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:15,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063176995] [2020-10-27 01:05:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:15,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:15,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:05:15,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:15,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 01:05:15,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:05:15,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:15,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:15,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:15,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:15,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:05:15,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:15,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:15,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063176995] [2020-10-27 01:05:15,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:15,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:15,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10178262] [2020-10-27 01:05:15,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:15,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:15,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:15,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:15,399 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 5 states. [2020-10-27 01:05:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:15,670 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2020-10-27 01:05:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:15,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 01:05:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:15,673 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:05:15,673 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:05:15,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:05:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-10-27 01:05:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:05:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-27 01:05:15,683 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 22 [2020-10-27 01:05:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:15,683 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-27 01:05:15,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-27 01:05:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:05:15,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:15,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:15,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:05:15,686 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1622058487, now seen corresponding path program 1 times [2020-10-27 01:05:15,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:15,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856155498] [2020-10-27 01:05:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:15,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:15,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:05:15,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:15,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 01:05:15,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:05:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:15,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:15,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:15,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:15,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:15,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:15,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:15,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:15,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:15,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:15,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856155498] [2020-10-27 01:05:15,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:15,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:15,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645440183] [2020-10-27 01:05:15,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:15,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:15,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:15,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:15,807 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 4 states. [2020-10-27 01:05:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:16,007 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-10-27 01:05:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:16,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 01:05:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:16,009 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:05:16,009 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:05:16,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:05:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2020-10-27 01:05:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:05:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-27 01:05:16,027 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 26 [2020-10-27 01:05:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:16,027 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-27 01:05:16,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-27 01:05:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:16,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:16,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:16,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:05:16,030 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:16,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1263296047, now seen corresponding path program 1 times [2020-10-27 01:05:16,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:16,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056258416] [2020-10-27 01:05:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:16,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:16,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:16,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-27 01:05:16,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:05:16,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:16,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:16,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:16,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:16,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:16,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:16,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:16,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:16,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:16,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:16,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:16,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056258416] [2020-10-27 01:05:16,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:16,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:16,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184642766] [2020-10-27 01:05:16,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:16,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:16,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:16,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:16,714 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 6 states. [2020-10-27 01:05:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:17,185 INFO L93 Difference]: Finished difference Result 169 states and 213 transitions. [2020-10-27 01:05:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:17,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 01:05:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:17,189 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:05:17,190 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:05:17,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:05:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 83. [2020-10-27 01:05:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:05:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-27 01:05:17,208 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 27 [2020-10-27 01:05:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:17,209 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-27 01:05:17,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-27 01:05:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:17,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:17,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:17,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:05:17,214 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:17,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2058594897, now seen corresponding path program 1 times [2020-10-27 01:05:17,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:17,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32247981] [2020-10-27 01:05:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:17,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:18,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:18,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:18,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 871 [2020-10-27 01:05:18,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:18,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:18,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:18,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:18,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:18,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:18,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:18,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:18,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:18,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:18,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:18,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:18,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:18,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:18,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:18,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32247981] [2020-10-27 01:05:18,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:18,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:05:18,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140017564] [2020-10-27 01:05:18,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:05:18,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:05:18,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:05:18,221 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 7 states. [2020-10-27 01:05:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:18,815 INFO L93 Difference]: Finished difference Result 216 states and 273 transitions. [2020-10-27 01:05:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:18,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:05:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:18,817 INFO L225 Difference]: With dead ends: 216 [2020-10-27 01:05:18,817 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 01:05:18,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 01:05:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 92. [2020-10-27 01:05:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:05:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2020-10-27 01:05:18,835 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 27 [2020-10-27 01:05:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:18,835 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2020-10-27 01:05:18,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:05:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2020-10-27 01:05:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:18,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:18,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:18,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:05:18,837 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1688120956, now seen corresponding path program 1 times [2020-10-27 01:05:18,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:18,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122179051] [2020-10-27 01:05:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:18,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:19,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:19,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-27 01:05:19,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:05:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:05:19,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:19,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:19,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:19,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:19,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:19,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122179051] [2020-10-27 01:05:19,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:19,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:19,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436185471] [2020-10-27 01:05:19,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:19,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:19,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:19,177 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand 6 states. [2020-10-27 01:05:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:19,499 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-10-27 01:05:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:19,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 01:05:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:19,501 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:05:19,501 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:05:19,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:05:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-10-27 01:05:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:05:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-10-27 01:05:19,511 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 29 [2020-10-27 01:05:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:19,511 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-10-27 01:05:19,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-10-27 01:05:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:19,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:19,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:19,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:05:19,514 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:19,514 INFO L82 PathProgramCache]: Analyzing trace with hash 833686020, now seen corresponding path program 1 times [2020-10-27 01:05:19,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:19,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206139207] [2020-10-27 01:05:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:19,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-27 01:05:19,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 01:05:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:19,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:19,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:19,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:19,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:19,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:19,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:19,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:19,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206139207] [2020-10-27 01:05:19,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:19,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:19,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376142797] [2020-10-27 01:05:19,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:19,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:19,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:19,763 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 5 states. [2020-10-27 01:05:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:20,011 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2020-10-27 01:05:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:20,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 01:05:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:20,013 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:05:20,013 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:05:20,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:05:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2020-10-27 01:05:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:05:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-10-27 01:05:20,022 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 29 [2020-10-27 01:05:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:20,023 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-10-27 01:05:20,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-10-27 01:05:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:05:20,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:20,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:20,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:05:20,025 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:20,025 INFO L82 PathProgramCache]: Analyzing trace with hash -964421169, now seen corresponding path program 1 times [2020-10-27 01:05:20,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:20,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885644956] [2020-10-27 01:05:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:20,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:20,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:05:20,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:20,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-27 01:05:20,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:05:20,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:20,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:20,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:20,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:20,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:20,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885644956] [2020-10-27 01:05:20,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:20,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:20,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159050305] [2020-10-27 01:05:20,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:20,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:20,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:20,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:20,772 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 8 states. [2020-10-27 01:05:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:21,628 INFO L93 Difference]: Finished difference Result 175 states and 216 transitions. [2020-10-27 01:05:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:21,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 01:05:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:21,630 INFO L225 Difference]: With dead ends: 175 [2020-10-27 01:05:21,631 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:05:21,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:05:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 96. [2020-10-27 01:05:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:05:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2020-10-27 01:05:21,641 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 30 [2020-10-27 01:05:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:21,642 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2020-10-27 01:05:21,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2020-10-27 01:05:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:05:21,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:21,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:21,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:05:21,644 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:21,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1480227389, now seen corresponding path program 1 times [2020-10-27 01:05:21,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:21,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020307256] [2020-10-27 01:05:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:21,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:22,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:05:22,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:22,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-27 01:05:22,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:22,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:22,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:22,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:22,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:22,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:22,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:22,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:22,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020307256] [2020-10-27 01:05:22,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:22,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:22,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457745754] [2020-10-27 01:05:22,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:22,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:22,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:22,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:22,176 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand 5 states. [2020-10-27 01:05:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:22,473 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2020-10-27 01:05:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:22,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-27 01:05:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:22,475 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:05:22,475 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:05:22,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:05:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2020-10-27 01:05:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 01:05:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2020-10-27 01:05:22,487 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 32 [2020-10-27 01:05:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:22,487 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2020-10-27 01:05:22,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2020-10-27 01:05:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:05:22,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:22,489 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] [2020-10-27 01:05:22,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:05:22,489 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1868212567, now seen corresponding path program 1 times [2020-10-27 01:05:22,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:22,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963672169] [2020-10-27 01:05:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:22,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:22,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:05:22,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:22,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 01:05:22,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:22,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:22,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:22,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:05:22,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:22,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:22,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:22,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:22,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:22,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:22,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:22,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:22,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963672169] [2020-10-27 01:05:22,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:22,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:05:22,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665368320] [2020-10-27 01:05:22,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:22,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:22,839 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand 6 states. [2020-10-27 01:05:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:23,325 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2020-10-27 01:05:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:23,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-27 01:05:23,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:23,328 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:05:23,328 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:05:23,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:05:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2020-10-27 01:05:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:05:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-10-27 01:05:23,341 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 32 [2020-10-27 01:05:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:23,341 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-10-27 01:05:23,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-10-27 01:05:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:05:23,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:23,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:23,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:05:23,342 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:23,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2008414403, now seen corresponding path program 1 times [2020-10-27 01:05:23,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:23,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410686456] [2020-10-27 01:05:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:23,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:05:24,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:24,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-27 01:05:24,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:24,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:24,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:24,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:24,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:24,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:24,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:05:24,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:24,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:24,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410686456] [2020-10-27 01:05:24,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:24,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:24,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354826791] [2020-10-27 01:05:24,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:24,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:24,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:24,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:24,626 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 8 states. [2020-10-27 01:05:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:25,314 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-10-27 01:05:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:25,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 01:05:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:25,316 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:05:25,317 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 01:05:25,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 01:05:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 120. [2020-10-27 01:05:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:05:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2020-10-27 01:05:25,334 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 33 [2020-10-27 01:05:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:25,336 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2020-10-27 01:05:25,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2020-10-27 01:05:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:05:25,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:25,339 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:25,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:05:25,339 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:25,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1268821399, now seen corresponding path program 1 times [2020-10-27 01:05:25,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:25,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528286211] [2020-10-27 01:05:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:25,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:05:25,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:25,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-27 01:05:25,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:25,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:25,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:26,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:26,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:26,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:26,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:26,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:26,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528286211] [2020-10-27 01:05:26,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:26,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:05:26,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304248816] [2020-10-27 01:05:26,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:26,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:26,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:26,111 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand 5 states. [2020-10-27 01:05:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:26,408 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2020-10-27 01:05:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:26,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-27 01:05:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:26,410 INFO L225 Difference]: With dead ends: 158 [2020-10-27 01:05:26,411 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:05:26,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:05:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2020-10-27 01:05:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:05:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2020-10-27 01:05:26,423 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 35 [2020-10-27 01:05:26,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:26,423 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2020-10-27 01:05:26,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2020-10-27 01:05:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:05:26,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:26,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:26,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:05:26,425 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash -597960010, now seen corresponding path program 1 times [2020-10-27 01:05:26,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:26,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564639960] [2020-10-27 01:05:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:05:26,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 01:05:26,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 01:05:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:05:26,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:26,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:26,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:26,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564639960] [2020-10-27 01:05:26,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:26,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:26,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66810168] [2020-10-27 01:05:26,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:26,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:26,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:26,543 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 4 states. [2020-10-27 01:05:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:26,739 INFO L93 Difference]: Finished difference Result 156 states and 192 transitions. [2020-10-27 01:05:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:26,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 01:05:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:26,742 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:05:26,742 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 01:05:26,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 01:05:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2020-10-27 01:05:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 01:05:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2020-10-27 01:05:26,756 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 37 [2020-10-27 01:05:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:26,757 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2020-10-27 01:05:26,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2020-10-27 01:05:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:05:26,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:26,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:26,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:05:26,758 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:26,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1877823688, now seen corresponding path program 1 times [2020-10-27 01:05:26,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:26,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789418316] [2020-10-27 01:05:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:05:26,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 01:05:26,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:05:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:26,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:26,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:26,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:26,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:26,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:26,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:26,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789418316] [2020-10-27 01:05:26,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:26,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:26,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532736343] [2020-10-27 01:05:26,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:26,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:26,901 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand 4 states. [2020-10-27 01:05:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:27,104 INFO L93 Difference]: Finished difference Result 249 states and 314 transitions. [2020-10-27 01:05:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:27,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 01:05:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:27,106 INFO L225 Difference]: With dead ends: 249 [2020-10-27 01:05:27,106 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:05:27,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:05:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 140. [2020-10-27 01:05:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:05:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2020-10-27 01:05:27,120 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 37 [2020-10-27 01:05:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:27,121 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2020-10-27 01:05:27,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2020-10-27 01:05:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:05:27,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:27,122 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:27,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:05:27,122 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1364392718, now seen corresponding path program 1 times [2020-10-27 01:05:27,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:27,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592716114] [2020-10-27 01:05:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:27,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:29,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:05:29,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:05:29,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2455 [2020-10-27 01:05:29,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:29,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:05:29,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:29,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:29,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:29,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:29,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:29,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:29,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:29,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592716114] [2020-10-27 01:05:29,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:29,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:29,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054954831] [2020-10-27 01:05:29,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:29,740 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand 8 states. [2020-10-27 01:05:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:30,468 INFO L93 Difference]: Finished difference Result 184 states and 222 transitions. [2020-10-27 01:05:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:30,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-27 01:05:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:30,470 INFO L225 Difference]: With dead ends: 184 [2020-10-27 01:05:30,470 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:05:30,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:05:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:05:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 121. [2020-10-27 01:05:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:05:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-27 01:05:30,488 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 38 [2020-10-27 01:05:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:30,489 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-27 01:05:30,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-27 01:05:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:05:30,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:30,490 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:30,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:05:30,490 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1818243446, now seen corresponding path program 1 times [2020-10-27 01:05:30,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:30,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502799836] [2020-10-27 01:05:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:30,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:05:33,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:33,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2704 [2020-10-27 01:05:33,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:05:33,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:33,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:33,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:33,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:33,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:33,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:33,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502799836] [2020-10-27 01:05:33,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:33,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:33,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842487860] [2020-10-27 01:05:33,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:33,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:33,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:33,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:33,695 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 10 states. [2020-10-27 01:05:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:34,971 INFO L93 Difference]: Finished difference Result 266 states and 329 transitions. [2020-10-27 01:05:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:05:34,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 01:05:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:34,975 INFO L225 Difference]: With dead ends: 266 [2020-10-27 01:05:34,975 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 01:05:34,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 01:05:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 140. [2020-10-27 01:05:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:05:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2020-10-27 01:05:34,997 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 39 [2020-10-27 01:05:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:34,997 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2020-10-27 01:05:34,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2020-10-27 01:05:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:05:34,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:34,999 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:34,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:05:34,999 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:34,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1286138102, now seen corresponding path program 1 times [2020-10-27 01:05:35,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:35,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103273593] [2020-10-27 01:05:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:35,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:05:35,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 01:05:35,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:05:35,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:35,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:35,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:35,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:35,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:35,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:35,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103273593] [2020-10-27 01:05:35,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:35,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:35,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064414826] [2020-10-27 01:05:35,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:35,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:35,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:35,842 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand 9 states. [2020-10-27 01:05:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:36,525 INFO L93 Difference]: Finished difference Result 299 states and 374 transitions. [2020-10-27 01:05:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:36,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-27 01:05:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:36,528 INFO L225 Difference]: With dead ends: 299 [2020-10-27 01:05:36,528 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 01:05:36,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 01:05:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2020-10-27 01:05:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:05:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-10-27 01:05:36,548 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 39 [2020-10-27 01:05:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:36,548 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-10-27 01:05:36,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-10-27 01:05:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:05:36,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:36,551 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:36,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:05:36,552 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:36,553 INFO L82 PathProgramCache]: Analyzing trace with hash -663927178, now seen corresponding path program 1 times [2020-10-27 01:05:36,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:36,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396823430] [2020-10-27 01:05:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:37,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:05:37,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:37,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-27 01:05:37,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:37,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:37,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:37,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:05:37,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:37,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:37,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:37,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:37,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:37,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:37,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:37,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:37,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:37,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:37,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:37,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396823430] [2020-10-27 01:05:37,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:37,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:37,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447404635] [2020-10-27 01:05:37,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:37,871 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 11 states. [2020-10-27 01:05:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:39,203 INFO L93 Difference]: Finished difference Result 252 states and 309 transitions. [2020-10-27 01:05:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:39,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 01:05:39,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:39,205 INFO L225 Difference]: With dead ends: 252 [2020-10-27 01:05:39,205 INFO L226 Difference]: Without dead ends: 248 [2020-10-27 01:05:39,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:39,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-27 01:05:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 146. [2020-10-27 01:05:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:05:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2020-10-27 01:05:39,221 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 42 [2020-10-27 01:05:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:39,222 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2020-10-27 01:05:39,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2020-10-27 01:05:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:05:39,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:39,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:39,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:05:39,223 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash 696381250, now seen corresponding path program 1 times [2020-10-27 01:05:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:39,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064188047] [2020-10-27 01:05:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:39,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:05:40,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:05:40,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1702 [2020-10-27 01:05:40,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:05:40,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:41,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:41,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:41,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:41,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:41,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:41,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:41,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:05:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064188047] [2020-10-27 01:05:41,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:41,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141988342] [2020-10-27 01:05:41,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:41,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:41,032 INFO L87 Difference]: Start difference. First operand 146 states and 171 transitions. Second operand 6 states. [2020-10-27 01:05:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:41,868 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2020-10-27 01:05:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:41,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-27 01:05:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:41,870 INFO L225 Difference]: With dead ends: 173 [2020-10-27 01:05:41,871 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:05:41,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:05:41,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 146. [2020-10-27 01:05:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:05:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 170 transitions. [2020-10-27 01:05:41,890 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 170 transitions. Word has length 43 [2020-10-27 01:05:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:41,890 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 170 transitions. [2020-10-27 01:05:41,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 170 transitions. [2020-10-27 01:05:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:05:41,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:41,891 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:41,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:05:41,892 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1924832086, now seen corresponding path program 1 times [2020-10-27 01:05:41,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:41,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756183571] [2020-10-27 01:05:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:05:46,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:05:46,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4840 [2020-10-27 01:05:46,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:46,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:46,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:05:46,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:47,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:47,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:47,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:47,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:47,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:47,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:47,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:47,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:47,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756183571] [2020-10-27 01:05:47,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:47,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:47,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170461417] [2020-10-27 01:05:47,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:47,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:47,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:47,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:47,084 INFO L87 Difference]: Start difference. First operand 146 states and 170 transitions. Second operand 10 states. [2020-10-27 01:05:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:47,969 INFO L93 Difference]: Finished difference Result 218 states and 262 transitions. [2020-10-27 01:05:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:47,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-27 01:05:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:47,972 INFO L225 Difference]: With dead ends: 218 [2020-10-27 01:05:47,972 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 01:05:47,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:05:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 01:05:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 176. [2020-10-27 01:05:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 01:05:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 212 transitions. [2020-10-27 01:05:47,989 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 212 transitions. Word has length 44 [2020-10-27 01:05:47,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:47,989 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 212 transitions. [2020-10-27 01:05:47,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 212 transitions. [2020-10-27 01:05:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:05:47,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:47,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:47,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:05:47,991 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1423607870, now seen corresponding path program 1 times [2020-10-27 01:05:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:47,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858529491] [2020-10-27 01:05:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:48,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:48,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:05:48,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-27 01:05:48,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:05:48,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:48,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:48,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:48,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:48,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:05:48,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:48,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858529491] [2020-10-27 01:05:48,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:48,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:48,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45474220] [2020-10-27 01:05:48,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:48,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:48,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:48,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:48,877 INFO L87 Difference]: Start difference. First operand 176 states and 212 transitions. Second operand 9 states. [2020-10-27 01:05:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:50,050 INFO L93 Difference]: Finished difference Result 514 states and 655 transitions. [2020-10-27 01:05:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:05:50,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-27 01:05:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:50,053 INFO L225 Difference]: With dead ends: 514 [2020-10-27 01:05:50,054 INFO L226 Difference]: Without dead ends: 434 [2020-10-27 01:05:50,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-27 01:05:50,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 251. [2020-10-27 01:05:50,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 01:05:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 303 transitions. [2020-10-27 01:05:50,080 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 303 transitions. Word has length 44 [2020-10-27 01:05:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:50,080 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 303 transitions. [2020-10-27 01:05:50,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 303 transitions. [2020-10-27 01:05:50,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:05:50,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:50,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:50,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:05:50,081 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1204753152, now seen corresponding path program 1 times [2020-10-27 01:05:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:50,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891413294] [2020-10-27 01:05:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:51,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:05:51,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:51,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-27 01:05:51,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:51,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:51,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:51,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:05:51,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:51,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:51,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:51,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:51,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:51,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:05:51,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:51,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:51,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:51,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:51,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:51,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891413294] [2020-10-27 01:05:51,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:51,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:51,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27351463] [2020-10-27 01:05:51,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:51,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:51,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:51,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:51,712 INFO L87 Difference]: Start difference. First operand 251 states and 303 transitions. Second operand 9 states. [2020-10-27 01:05:52,351 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 01:05:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:53,381 INFO L93 Difference]: Finished difference Result 492 states and 619 transitions. [2020-10-27 01:05:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:05:53,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-27 01:05:53,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:53,386 INFO L225 Difference]: With dead ends: 492 [2020-10-27 01:05:53,386 INFO L226 Difference]: Without dead ends: 412 [2020-10-27 01:05:53,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:05:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-27 01:05:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2020-10-27 01:05:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-27 01:05:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 377 transitions. [2020-10-27 01:05:53,421 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 377 transitions. Word has length 44 [2020-10-27 01:05:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:53,421 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 377 transitions. [2020-10-27 01:05:53,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 377 transitions. [2020-10-27 01:05:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:05:53,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:53,423 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:53,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:05:53,423 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash -981911876, now seen corresponding path program 1 times [2020-10-27 01:05:53,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:53,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566834689] [2020-10-27 01:05:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:53,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:56,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:05:56,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:56,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2612 [2020-10-27 01:05:56,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:56,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:05:56,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:56,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:56,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:56,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:56,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:56,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:56,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:56,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:56,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:56,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:56,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:56,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566834689] [2020-10-27 01:05:56,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:56,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:56,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628549727] [2020-10-27 01:05:56,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:56,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:56,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:56,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:56,468 INFO L87 Difference]: Start difference. First operand 309 states and 377 transitions. Second operand 11 states. [2020-10-27 01:05:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:57,673 INFO L93 Difference]: Finished difference Result 382 states and 467 transitions. [2020-10-27 01:05:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:57,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 01:05:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:57,676 INFO L225 Difference]: With dead ends: 382 [2020-10-27 01:05:57,676 INFO L226 Difference]: Without dead ends: 378 [2020-10-27 01:05:57,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:05:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-27 01:05:57,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 318. [2020-10-27 01:05:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-27 01:05:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 386 transitions. [2020-10-27 01:05:57,722 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 386 transitions. Word has length 45 [2020-10-27 01:05:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:57,722 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 386 transitions. [2020-10-27 01:05:57,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 386 transitions. [2020-10-27 01:05:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:05:57,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:57,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:57,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:05:57,725 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:57,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1386770188, now seen corresponding path program 1 times [2020-10-27 01:05:57,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:57,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294374111] [2020-10-27 01:05:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:01,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:06:01,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:06:01,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3641 [2020-10-27 01:06:01,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:01,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:06:01,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:06:01,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:01,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:01,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:01,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:01,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:01,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:01,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:01,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294374111] [2020-10-27 01:06:01,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:01,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:06:01,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252789209] [2020-10-27 01:06:01,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:06:01,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:06:01,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:06:01,569 INFO L87 Difference]: Start difference. First operand 318 states and 386 transitions. Second operand 7 states. [2020-10-27 01:06:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:02,095 INFO L93 Difference]: Finished difference Result 338 states and 409 transitions. [2020-10-27 01:06:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:02,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-10-27 01:06:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:02,098 INFO L225 Difference]: With dead ends: 338 [2020-10-27 01:06:02,098 INFO L226 Difference]: Without dead ends: 334 [2020-10-27 01:06:02,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-27 01:06:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 318. [2020-10-27 01:06:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-27 01:06:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 385 transitions. [2020-10-27 01:06:02,129 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 385 transitions. Word has length 46 [2020-10-27 01:06:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:02,129 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 385 transitions. [2020-10-27 01:06:02,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:06:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 385 transitions. [2020-10-27 01:06:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:06:02,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:02,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:02,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:06:02,131 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:02,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1729433936, now seen corresponding path program 1 times [2020-10-27 01:06:02,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:02,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674217042] [2020-10-27 01:06:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:03,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:06:03,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:06:03,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-10-27 01:06:03,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:03,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:03,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:03,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:06:03,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:03,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:03,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:03,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:03,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:03,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:03,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:03,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:03,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:03,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:03,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:06:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:03,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674217042] [2020-10-27 01:06:03,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:03,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:03,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636550744] [2020-10-27 01:06:03,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:03,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:03,890 INFO L87 Difference]: Start difference. First operand 318 states and 385 transitions. Second operand 9 states. [2020-10-27 01:06:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:04,837 INFO L93 Difference]: Finished difference Result 390 states and 476 transitions. [2020-10-27 01:06:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:04,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-27 01:06:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:04,840 INFO L225 Difference]: With dead ends: 390 [2020-10-27 01:06:04,841 INFO L226 Difference]: Without dead ends: 370 [2020-10-27 01:06:04,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:06:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-27 01:06:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 348. [2020-10-27 01:06:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-27 01:06:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 420 transitions. [2020-10-27 01:06:04,893 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 420 transitions. Word has length 47 [2020-10-27 01:06:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:04,893 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 420 transitions. [2020-10-27 01:06:04,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 420 transitions. [2020-10-27 01:06:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:06:04,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:04,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:04,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:06:04,895 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1467996354, now seen corresponding path program 1 times [2020-10-27 01:06:04,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:04,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606639020] [2020-10-27 01:06:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:06,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:06,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:06:06,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:06,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-27 01:06:06,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:06,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:06,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:06,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:06:06,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:06,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:06,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:06,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:06,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:06,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:06,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:06,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606639020] [2020-10-27 01:06:06,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:06,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:06,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398666680] [2020-10-27 01:06:06,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:06,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:06,764 INFO L87 Difference]: Start difference. First operand 348 states and 420 transitions. Second operand 10 states. [2020-10-27 01:06:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:08,280 INFO L93 Difference]: Finished difference Result 518 states and 642 transitions. [2020-10-27 01:06:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:06:08,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-27 01:06:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:08,284 INFO L225 Difference]: With dead ends: 518 [2020-10-27 01:06:08,284 INFO L226 Difference]: Without dead ends: 514 [2020-10-27 01:06:08,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:06:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-27 01:06:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 354. [2020-10-27 01:06:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-27 01:06:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 426 transitions. [2020-10-27 01:06:08,335 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 426 transitions. Word has length 47 [2020-10-27 01:06:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:08,335 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 426 transitions. [2020-10-27 01:06:08,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 426 transitions. [2020-10-27 01:06:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:06:08,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:08,337 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:08,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:06:08,337 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1192125048, now seen corresponding path program 2 times [2020-10-27 01:06:08,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:08,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951498604] [2020-10-27 01:06:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:08,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:10,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:06:10,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:06:10,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1657 [2020-10-27 01:06:10,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:06:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:10,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:10,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:10,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:10,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:10,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:10,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:10,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951498604] [2020-10-27 01:06:10,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:10,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:10,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215178782] [2020-10-27 01:06:10,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:10,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:10,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:10,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:10,177 INFO L87 Difference]: Start difference. First operand 354 states and 426 transitions. Second operand 10 states. [2020-10-27 01:06:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:11,286 INFO L93 Difference]: Finished difference Result 482 states and 588 transitions. [2020-10-27 01:06:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:06:11,287 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-27 01:06:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:11,290 INFO L225 Difference]: With dead ends: 482 [2020-10-27 01:06:11,290 INFO L226 Difference]: Without dead ends: 403 [2020-10-27 01:06:11,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:06:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-27 01:06:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 362. [2020-10-27 01:06:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-27 01:06:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 434 transitions. [2020-10-27 01:06:11,326 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 434 transitions. Word has length 49 [2020-10-27 01:06:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:11,326 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 434 transitions. [2020-10-27 01:06:11,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 434 transitions. [2020-10-27 01:06:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:06:11,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:11,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:11,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:06:11,329 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2093571788, now seen corresponding path program 1 times [2020-10-27 01:06:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:11,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791939883] [2020-10-27 01:06:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:11,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:06:12,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:06:12,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1602 [2020-10-27 01:06:12,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:06:12,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:12,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:06:12,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:13,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:13,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:13,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:13,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:13,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791939883] [2020-10-27 01:06:13,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:13,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:06:13,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181488348] [2020-10-27 01:06:13,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:06:13,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:06:13,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:06:13,055 INFO L87 Difference]: Start difference. First operand 362 states and 434 transitions. Second operand 7 states. [2020-10-27 01:06:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:13,564 INFO L93 Difference]: Finished difference Result 380 states and 454 transitions. [2020-10-27 01:06:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:13,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-27 01:06:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:13,566 INFO L225 Difference]: With dead ends: 380 [2020-10-27 01:06:13,567 INFO L226 Difference]: Without dead ends: 347 [2020-10-27 01:06:13,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-27 01:06:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 333. [2020-10-27 01:06:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-27 01:06:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 404 transitions. [2020-10-27 01:06:13,603 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 404 transitions. Word has length 49 [2020-10-27 01:06:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:13,603 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 404 transitions. [2020-10-27 01:06:13,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:06:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 404 transitions. [2020-10-27 01:06:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:06:13,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:13,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:13,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:06:13,605 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:13,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1470623984, now seen corresponding path program 1 times [2020-10-27 01:06:13,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:13,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433570308] [2020-10-27 01:06:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:14,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:06:14,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-27 01:06:14,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:14,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:14,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:14,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:06:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:15,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:15,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:15,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:15,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:15,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:15,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:15,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:15,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:15,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:15,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433570308] [2020-10-27 01:06:15,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:15,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115642604] [2020-10-27 01:06:15,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:15,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:15,030 INFO L87 Difference]: Start difference. First operand 333 states and 404 transitions. Second operand 11 states. [2020-10-27 01:06:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:16,532 INFO L93 Difference]: Finished difference Result 501 states and 623 transitions. [2020-10-27 01:06:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:06:16,533 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 01:06:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:16,536 INFO L225 Difference]: With dead ends: 501 [2020-10-27 01:06:16,536 INFO L226 Difference]: Without dead ends: 497 [2020-10-27 01:06:16,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:06:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-27 01:06:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 339. [2020-10-27 01:06:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-27 01:06:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 410 transitions. [2020-10-27 01:06:16,573 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 410 transitions. Word has length 50 [2020-10-27 01:06:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:16,573 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 410 transitions. [2020-10-27 01:06:16,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 410 transitions. [2020-10-27 01:06:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:06:16,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:16,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:16,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:06:16,575 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1129224857, now seen corresponding path program 1 times [2020-10-27 01:06:16,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:16,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580717454] [2020-10-27 01:06:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:16,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:18,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:06:18,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:18,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1860 [2020-10-27 01:06:18,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:18,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:18,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:18,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:06:18,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:18,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:18,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:18,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:18,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:18,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:18,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:18,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:18,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580717454] [2020-10-27 01:06:18,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:18,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:18,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144288592] [2020-10-27 01:06:18,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:18,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:18,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:18,863 INFO L87 Difference]: Start difference. First operand 339 states and 410 transitions. Second operand 11 states. [2020-10-27 01:06:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:20,165 INFO L93 Difference]: Finished difference Result 442 states and 533 transitions. [2020-10-27 01:06:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:20,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 01:06:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:20,168 INFO L225 Difference]: With dead ends: 442 [2020-10-27 01:06:20,168 INFO L226 Difference]: Without dead ends: 301 [2020-10-27 01:06:20,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:06:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-27 01:06:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 282. [2020-10-27 01:06:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-27 01:06:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 323 transitions. [2020-10-27 01:06:20,205 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 323 transitions. Word has length 50 [2020-10-27 01:06:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:20,206 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 323 transitions. [2020-10-27 01:06:20,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 323 transitions. [2020-10-27 01:06:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:06:20,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:20,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:20,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:06:20,207 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:20,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1677713179, now seen corresponding path program 1 times [2020-10-27 01:06:20,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:20,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777058801] [2020-10-27 01:06:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:20,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:24,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:06:24,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:06:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3939 [2020-10-27 01:06:24,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:06:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:24,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:24,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:24,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:24,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:24,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:24,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:24,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:24,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:24,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:24,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777058801] [2020-10-27 01:06:24,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:24,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:24,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437152454] [2020-10-27 01:06:24,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:24,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:24,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:24,681 INFO L87 Difference]: Start difference. First operand 282 states and 323 transitions. Second operand 10 states. [2020-10-27 01:06:25,145 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-27 01:06:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:26,143 INFO L93 Difference]: Finished difference Result 463 states and 561 transitions. [2020-10-27 01:06:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:26,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 01:06:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:26,145 INFO L225 Difference]: With dead ends: 463 [2020-10-27 01:06:26,145 INFO L226 Difference]: Without dead ends: 384 [2020-10-27 01:06:26,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-27 01:06:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 288. [2020-10-27 01:06:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 01:06:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 329 transitions. [2020-10-27 01:06:26,179 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 329 transitions. Word has length 55 [2020-10-27 01:06:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:26,179 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 329 transitions. [2020-10-27 01:06:26,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 329 transitions. [2020-10-27 01:06:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:06:26,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:26,181 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:26,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:06:26,181 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:26,182 INFO L82 PathProgramCache]: Analyzing trace with hash 379585008, now seen corresponding path program 1 times [2020-10-27 01:06:26,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:26,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542243588] [2020-10-27 01:06:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:26,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:29,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:29,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:06:29,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:06:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3297 [2020-10-27 01:06:29,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:06:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:29,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:29,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:29,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:29,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:29,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:29,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:29,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:29,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:29,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:29,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:06:29,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542243588] [2020-10-27 01:06:29,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:29,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:29,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164924703] [2020-10-27 01:06:29,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:29,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:29,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:29,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:29,801 INFO L87 Difference]: Start difference. First operand 288 states and 329 transitions. Second operand 8 states. [2020-10-27 01:06:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:30,514 INFO L93 Difference]: Finished difference Result 327 states and 374 transitions. [2020-10-27 01:06:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:30,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 01:06:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:30,516 INFO L225 Difference]: With dead ends: 327 [2020-10-27 01:06:30,516 INFO L226 Difference]: Without dead ends: 310 [2020-10-27 01:06:30,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-27 01:06:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 302. [2020-10-27 01:06:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-27 01:06:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 346 transitions. [2020-10-27 01:06:30,550 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 346 transitions. Word has length 55 [2020-10-27 01:06:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:30,551 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 346 transitions. [2020-10-27 01:06:30,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 346 transitions. [2020-10-27 01:06:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:06:30,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:30,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:30,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:06:30,552 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash -877116251, now seen corresponding path program 2 times [2020-10-27 01:06:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:30,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257005986] [2020-10-27 01:06:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:30,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:30,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:31,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:06:31,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:31,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-27 01:06:31,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:06:31,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:32,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:32,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:32,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:32,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:32,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:32,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:32,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:32,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:32,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:32,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:32,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:32,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257005986] [2020-10-27 01:06:32,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:32,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:32,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883451293] [2020-10-27 01:06:32,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:32,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:32,345 INFO L87 Difference]: Start difference. First operand 302 states and 346 transitions. Second operand 11 states. [2020-10-27 01:06:33,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:33,792 INFO L93 Difference]: Finished difference Result 606 states and 739 transitions. [2020-10-27 01:06:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:33,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 01:06:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:33,795 INFO L225 Difference]: With dead ends: 606 [2020-10-27 01:06:33,796 INFO L226 Difference]: Without dead ends: 527 [2020-10-27 01:06:33,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-10-27 01:06:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 365. [2020-10-27 01:06:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 01:06:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 415 transitions. [2020-10-27 01:06:33,835 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 415 transitions. Word has length 56 [2020-10-27 01:06:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:33,835 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 415 transitions. [2020-10-27 01:06:33,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 415 transitions. [2020-10-27 01:06:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:06:33,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:33,837 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:33,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:06:33,837 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1366867047, now seen corresponding path program 1 times [2020-10-27 01:06:33,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:33,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808469444] [2020-10-27 01:06:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:33,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:34,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:34,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:34,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:35,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:35,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:06:35,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:06:35,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1759 [2020-10-27 01:06:35,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:35,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:35,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:06:35,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:35,874 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-27 01:06:36,012 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-27 01:06:36,130 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-27 01:06:36,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:36,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:36,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:36,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:36,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:36,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:36,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:36,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:36,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:36,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:36,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:36,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808469444] [2020-10-27 01:06:36,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:36,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:36,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124648084] [2020-10-27 01:06:36,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:36,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:36,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:36,351 INFO L87 Difference]: Start difference. First operand 365 states and 415 transitions. Second operand 11 states. [2020-10-27 01:06:36,726 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 01:06:37,001 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 01:06:38,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:38,364 INFO L93 Difference]: Finished difference Result 552 states and 661 transitions. [2020-10-27 01:06:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:38,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 01:06:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:38,366 INFO L225 Difference]: With dead ends: 552 [2020-10-27 01:06:38,366 INFO L226 Difference]: Without dead ends: 473 [2020-10-27 01:06:38,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-27 01:06:38,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 365. [2020-10-27 01:06:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 01:06:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 415 transitions. [2020-10-27 01:06:38,408 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 415 transitions. Word has length 56 [2020-10-27 01:06:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:38,408 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 415 transitions. [2020-10-27 01:06:38,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 415 transitions. [2020-10-27 01:06:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:06:38,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:38,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:38,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:06:38,410 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash 458482242, now seen corresponding path program 2 times [2020-10-27 01:06:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:38,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034717734] [2020-10-27 01:06:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:38,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:39,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:39,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:43,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:43,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:06:43,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:06:43,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4925 [2020-10-27 01:06:43,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:06:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:43,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:43,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:43,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:43,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:43,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:43,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:43,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:43,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:06:43,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034717734] [2020-10-27 01:06:43,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:43,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:43,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160053793] [2020-10-27 01:06:43,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:43,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:43,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:43,668 INFO L87 Difference]: Start difference. First operand 365 states and 415 transitions. Second operand 9 states. [2020-10-27 01:06:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:44,312 INFO L93 Difference]: Finished difference Result 477 states and 559 transitions. [2020-10-27 01:06:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:06:44,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 01:06:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:44,314 INFO L225 Difference]: With dead ends: 477 [2020-10-27 01:06:44,315 INFO L226 Difference]: Without dead ends: 435 [2020-10-27 01:06:44,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-27 01:06:44,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 418. [2020-10-27 01:06:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-27 01:06:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 492 transitions. [2020-10-27 01:06:44,361 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 492 transitions. Word has length 58 [2020-10-27 01:06:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:44,362 INFO L481 AbstractCegarLoop]: Abstraction has 418 states and 492 transitions. [2020-10-27 01:06:44,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 492 transitions. [2020-10-27 01:06:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:06:44,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:44,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:44,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:06:44,363 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:44,364 INFO L82 PathProgramCache]: Analyzing trace with hash -316182789, now seen corresponding path program 2 times [2020-10-27 01:06:44,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:44,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594951513] [2020-10-27 01:06:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:44,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:49,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:49,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:06:49,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:49,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 01:06:49,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:49,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:49,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:49,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:06:49,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:49,790 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-27 01:06:50,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:50,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:50,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:50,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:50,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:50,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:50,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:50,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:50,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:50,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:50,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:50,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594951513] [2020-10-27 01:06:50,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:50,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:50,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35151532] [2020-10-27 01:06:50,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:50,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:50,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:50,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:50,193 INFO L87 Difference]: Start difference. First operand 418 states and 492 transitions. Second operand 12 states. [2020-10-27 01:06:50,700 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-27 01:06:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:52,001 INFO L93 Difference]: Finished difference Result 664 states and 798 transitions. [2020-10-27 01:06:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:52,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-27 01:06:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:52,004 INFO L225 Difference]: With dead ends: 664 [2020-10-27 01:06:52,004 INFO L226 Difference]: Without dead ends: 660 [2020-10-27 01:06:52,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:06:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2020-10-27 01:06:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 487. [2020-10-27 01:06:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-10-27 01:06:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 567 transitions. [2020-10-27 01:06:52,052 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 567 transitions. Word has length 59 [2020-10-27 01:06:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:52,052 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 567 transitions. [2020-10-27 01:06:52,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 567 transitions. [2020-10-27 01:06:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:06:52,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:52,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:52,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:06:52,054 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash 287733443, now seen corresponding path program 2 times [2020-10-27 01:06:52,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:52,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707656018] [2020-10-27 01:06:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:52,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:52,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:52,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:52,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:53,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:06:53,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:53,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-27 01:06:53,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:06:53,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:53,789 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-27 01:06:54,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:54,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:54,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:54,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:54,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:06:54,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707656018] [2020-10-27 01:06:54,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:54,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:54,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158666927] [2020-10-27 01:06:54,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:54,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:54,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:54,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:54,033 INFO L87 Difference]: Start difference. First operand 487 states and 567 transitions. Second operand 10 states. [2020-10-27 01:06:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:54,872 INFO L93 Difference]: Finished difference Result 541 states and 627 transitions. [2020-10-27 01:06:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:06:54,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 01:06:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:54,876 INFO L225 Difference]: With dead ends: 541 [2020-10-27 01:06:54,876 INFO L226 Difference]: Without dead ends: 453 [2020-10-27 01:06:54,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-27 01:06:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 439. [2020-10-27 01:06:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-27 01:06:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 495 transitions. [2020-10-27 01:06:54,925 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 495 transitions. Word has length 60 [2020-10-27 01:06:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:54,926 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 495 transitions. [2020-10-27 01:06:54,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 495 transitions. [2020-10-27 01:06:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:06:54,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:54,927 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:54,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:06:54,928 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:54,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1672264833, now seen corresponding path program 2 times [2020-10-27 01:06:54,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:54,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707243028] [2020-10-27 01:06:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:54,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:58,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:06:58,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:06:58,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3160 [2020-10-27 01:06:58,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:58,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:58,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:58,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:06:58,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,421 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 01:06:58,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:58,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:58,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:58,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:58,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:58,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:58,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:58,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:58,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:58,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:58,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707243028] [2020-10-27 01:06:58,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:58,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:58,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240597435] [2020-10-27 01:06:58,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:58,666 INFO L87 Difference]: Start difference. First operand 439 states and 495 transitions. Second operand 12 states. [2020-10-27 01:06:59,581 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-27 01:07:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:00,785 INFO L93 Difference]: Finished difference Result 876 states and 1049 transitions. [2020-10-27 01:07:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:00,791 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-27 01:07:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:00,795 INFO L225 Difference]: With dead ends: 876 [2020-10-27 01:07:00,795 INFO L226 Difference]: Without dead ends: 797 [2020-10-27 01:07:00,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2020-10-27 01:07:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 595. [2020-10-27 01:07:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-27 01:07:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 679 transitions. [2020-10-27 01:07:00,868 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 679 transitions. Word has length 61 [2020-10-27 01:07:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:00,869 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 679 transitions. [2020-10-27 01:07:00,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 679 transitions. [2020-10-27 01:07:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:07:00,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:00,871 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:00,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:07:00,871 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash -250963201, now seen corresponding path program 3 times [2020-10-27 01:07:00,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:00,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129418969] [2020-10-27 01:07:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:00,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:02,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:04,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:04,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:07:04,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:07:04,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4013 [2020-10-27 01:07:04,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:04,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:04,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:04,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:07:04,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:05,146 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-27 01:07:05,349 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-27 01:07:05,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:05,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:05,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:05,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:05,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:05,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129418969] [2020-10-27 01:07:05,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:05,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:05,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474450148] [2020-10-27 01:07:05,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:05,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:05,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:05,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:05,706 INFO L87 Difference]: Start difference. First operand 595 states and 679 transitions. Second operand 12 states. [2020-10-27 01:07:06,131 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 01:07:06,754 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-27 01:07:07,622 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-27 01:07:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:08,112 INFO L93 Difference]: Finished difference Result 864 states and 1029 transitions. [2020-10-27 01:07:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:07:08,112 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-27 01:07:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:08,116 INFO L225 Difference]: With dead ends: 864 [2020-10-27 01:07:08,116 INFO L226 Difference]: Without dead ends: 785 [2020-10-27 01:07:08,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:07:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-10-27 01:07:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 690. [2020-10-27 01:07:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-27 01:07:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 800 transitions. [2020-10-27 01:07:08,196 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 800 transitions. Word has length 61 [2020-10-27 01:07:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:08,197 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 800 transitions. [2020-10-27 01:07:08,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 800 transitions. [2020-10-27 01:07:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:07:08,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:08,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:08,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:07:08,199 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:08,199 INFO L82 PathProgramCache]: Analyzing trace with hash -789937129, now seen corresponding path program 2 times [2020-10-27 01:07:08,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:08,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531007839] [2020-10-27 01:07:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:08,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:08,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:09,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:11,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:07:11,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:07:11,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3606 [2020-10-27 01:07:11,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:07:11,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:12,226 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-27 01:07:12,488 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-27 01:07:12,643 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-27 01:07:12,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:12,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:12,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:12,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:12,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:12,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:12,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531007839] [2020-10-27 01:07:12,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:12,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:12,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344343269] [2020-10-27 01:07:12,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:12,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:12,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:12,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:12,977 INFO L87 Difference]: Start difference. First operand 690 states and 800 transitions. Second operand 12 states. [2020-10-27 01:07:13,348 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-27 01:07:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:14,621 INFO L93 Difference]: Finished difference Result 895 states and 1063 transitions. [2020-10-27 01:07:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:14,621 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-27 01:07:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:14,624 INFO L225 Difference]: With dead ends: 895 [2020-10-27 01:07:14,624 INFO L226 Difference]: Without dead ends: 891 [2020-10-27 01:07:14,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:07:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-27 01:07:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 720. [2020-10-27 01:07:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-10-27 01:07:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 832 transitions. [2020-10-27 01:07:14,706 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 832 transitions. Word has length 62 [2020-10-27 01:07:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:14,706 INFO L481 AbstractCegarLoop]: Abstraction has 720 states and 832 transitions. [2020-10-27 01:07:14,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 832 transitions. [2020-10-27 01:07:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:07:14,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:14,708 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:14,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:07:14,708 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2048800399, now seen corresponding path program 1 times [2020-10-27 01:07:14,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:14,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625472483] [2020-10-27 01:07:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:14,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:14,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:19,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:19,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:07:19,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:07:19,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:07:19,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:07:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:07:19,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:20,053 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2020-10-27 01:07:20,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:20,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:20,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:20,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:20,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:20,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:20,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:20,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:20,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:20,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:20,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:07:20,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625472483] [2020-10-27 01:07:20,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:20,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:07:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606898344] [2020-10-27 01:07:20,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:07:20,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:07:20,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:07:20,285 INFO L87 Difference]: Start difference. First operand 720 states and 832 transitions. Second operand 10 states. [2020-10-27 01:07:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:21,769 INFO L93 Difference]: Finished difference Result 749 states and 864 transitions. [2020-10-27 01:07:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:21,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-27 01:07:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:21,775 INFO L225 Difference]: With dead ends: 749 [2020-10-27 01:07:21,775 INFO L226 Difference]: Without dead ends: 745 [2020-10-27 01:07:21,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-10-27 01:07:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 726. [2020-10-27 01:07:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2020-10-27 01:07:21,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 838 transitions. [2020-10-27 01:07:21,850 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 838 transitions. Word has length 63 [2020-10-27 01:07:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:21,850 INFO L481 AbstractCegarLoop]: Abstraction has 726 states and 838 transitions. [2020-10-27 01:07:21,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:07:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 838 transitions. [2020-10-27 01:07:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:07:21,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:21,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:21,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:07:21,853 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash 388995487, now seen corresponding path program 1 times [2020-10-27 01:07:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:21,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738118500] [2020-10-27 01:07:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:21,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:25,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:07:25,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:07:25,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3143 [2020-10-27 01:07:25,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:07:25,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:25,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:25,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:25,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:25,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:25,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:25,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:25,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:25,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738118500] [2020-10-27 01:07:25,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:25,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:25,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268783886] [2020-10-27 01:07:25,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:25,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:25,492 INFO L87 Difference]: Start difference. First operand 726 states and 838 transitions. Second operand 13 states. [2020-10-27 01:07:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:27,917 INFO L93 Difference]: Finished difference Result 926 states and 1095 transitions. [2020-10-27 01:07:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:07:27,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2020-10-27 01:07:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:27,921 INFO L225 Difference]: With dead ends: 926 [2020-10-27 01:07:27,921 INFO L226 Difference]: Without dead ends: 922 [2020-10-27 01:07:27,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:07:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2020-10-27 01:07:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 732. [2020-10-27 01:07:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-10-27 01:07:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 844 transitions. [2020-10-27 01:07:27,984 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 844 transitions. Word has length 64 [2020-10-27 01:07:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:27,985 INFO L481 AbstractCegarLoop]: Abstraction has 732 states and 844 transitions. [2020-10-27 01:07:27,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 844 transitions. [2020-10-27 01:07:27,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:07:27,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:27,987 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:27,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:07:27,987 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash -786578709, now seen corresponding path program 1 times [2020-10-27 01:07:27,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:27,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427478529] [2020-10-27 01:07:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:28,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:29,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:33,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:33,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:07:33,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:07:33,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:07:33,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:33,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:07:33,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:33,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:07:33,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:33,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:33,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:33,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:33,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:33,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:33,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:33,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:33,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:33,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:33,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:07:33,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427478529] [2020-10-27 01:07:33,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:33,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:07:33,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882649990] [2020-10-27 01:07:33,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:07:33,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:07:33,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:07:33,404 INFO L87 Difference]: Start difference. First operand 732 states and 844 transitions. Second operand 9 states. [2020-10-27 01:07:33,728 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-27 01:07:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:34,499 INFO L93 Difference]: Finished difference Result 769 states and 885 transitions. [2020-10-27 01:07:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:34,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-10-27 01:07:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:34,503 INFO L225 Difference]: With dead ends: 769 [2020-10-27 01:07:34,503 INFO L226 Difference]: Without dead ends: 765 [2020-10-27 01:07:34,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2020-10-27 01:07:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 733. [2020-10-27 01:07:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-10-27 01:07:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 845 transitions. [2020-10-27 01:07:34,563 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 845 transitions. Word has length 66 [2020-10-27 01:07:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:34,563 INFO L481 AbstractCegarLoop]: Abstraction has 733 states and 845 transitions. [2020-10-27 01:07:34,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:07:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 845 transitions. [2020-10-27 01:07:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:07:34,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:34,565 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:34,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:07:34,565 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1376371479, now seen corresponding path program 4 times [2020-10-27 01:07:34,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:34,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73650985] [2020-10-27 01:07:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:34,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:35,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:35,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:39,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:39,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:07:39,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:07:39,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:07:39,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:07:39,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:39,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:39,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:39,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:39,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:39,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:39,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:39,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:39,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:39,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:39,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73650985] [2020-10-27 01:07:40,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:40,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555836926] [2020-10-27 01:07:40,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:40,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:40,003 INFO L87 Difference]: Start difference. First operand 733 states and 845 transitions. Second operand 12 states. [2020-10-27 01:07:41,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:41,770 INFO L93 Difference]: Finished difference Result 848 states and 991 transitions. [2020-10-27 01:07:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:41,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-27 01:07:41,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:41,773 INFO L225 Difference]: With dead ends: 848 [2020-10-27 01:07:41,773 INFO L226 Difference]: Without dead ends: 769 [2020-10-27 01:07:41,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2020-10-27 01:07:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 743. [2020-10-27 01:07:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-10-27 01:07:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 855 transitions. [2020-10-27 01:07:41,835 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 855 transitions. Word has length 66 [2020-10-27 01:07:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:41,835 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 855 transitions. [2020-10-27 01:07:41,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 855 transitions. [2020-10-27 01:07:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:07:41,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:41,837 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:41,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:07:41,838 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:41,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2080878151, now seen corresponding path program 1 times [2020-10-27 01:07:41,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:41,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414982931] [2020-10-27 01:07:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:42,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:42,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:42,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:43,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:43,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:43,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:43,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:46,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:46,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:07:46,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 01:07:46,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:07:46,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:07:46,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:47,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:47,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:47,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:47,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:47,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:47,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:47,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:07:47,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414982931] [2020-10-27 01:07:47,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:47,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:47,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41480443] [2020-10-27 01:07:47,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:47,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:47,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:47,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:47,494 INFO L87 Difference]: Start difference. First operand 743 states and 855 transitions. Second operand 12 states. [2020-10-27 01:07:48,019 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-27 01:07:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:48,829 INFO L93 Difference]: Finished difference Result 756 states and 867 transitions. [2020-10-27 01:07:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:48,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-27 01:07:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:48,832 INFO L225 Difference]: With dead ends: 756 [2020-10-27 01:07:48,832 INFO L226 Difference]: Without dead ends: 718 [2020-10-27 01:07:48,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:07:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-10-27 01:07:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2020-10-27 01:07:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-10-27 01:07:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 829 transitions. [2020-10-27 01:07:48,895 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 829 transitions. Word has length 66 [2020-10-27 01:07:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:48,896 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 829 transitions. [2020-10-27 01:07:48,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 829 transitions. [2020-10-27 01:07:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:48,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:48,898 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:48,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:07:48,898 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1225888226, now seen corresponding path program 3 times [2020-10-27 01:07:48,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:48,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31698570] [2020-10-27 01:07:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:50,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:53,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:53,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:53,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:07:53,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 01:07:53,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:07:53,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:54,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:54,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:54,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:54,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:54,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:54,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:54,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:54,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:54,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:54,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31698570] [2020-10-27 01:07:54,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:54,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:54,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694800650] [2020-10-27 01:07:54,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:54,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:54,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:54,363 INFO L87 Difference]: Start difference. First operand 718 states and 829 transitions. Second operand 13 states. [2020-10-27 01:07:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:55,844 INFO L93 Difference]: Finished difference Result 989 states and 1170 transitions. [2020-10-27 01:07:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:07:55,845 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-27 01:07:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:55,849 INFO L225 Difference]: With dead ends: 989 [2020-10-27 01:07:55,849 INFO L226 Difference]: Without dead ends: 784 [2020-10-27 01:07:55,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-10-27 01:07:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 642. [2020-10-27 01:07:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-10-27 01:07:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 713 transitions. [2020-10-27 01:07:55,909 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 713 transitions. Word has length 67 [2020-10-27 01:07:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:55,909 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 713 transitions. [2020-10-27 01:07:55,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 713 transitions. [2020-10-27 01:07:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:55,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:55,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:55,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:07:55,911 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:55,911 INFO L82 PathProgramCache]: Analyzing trace with hash -134462935, now seen corresponding path program 1 times [2020-10-27 01:07:55,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:55,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352466466] [2020-10-27 01:07:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:55,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:55,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:57,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:58,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:00,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:00,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:08:00,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:08:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 01:08:00,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:08:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:08:00,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:01,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:01,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:01,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:01,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:08:01,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:01,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:01,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:01,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:08:01,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352466466] [2020-10-27 01:08:01,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:01,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:01,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006459764] [2020-10-27 01:08:01,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:01,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:01,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:01,386 INFO L87 Difference]: Start difference. First operand 642 states and 713 transitions. Second operand 11 states. [2020-10-27 01:08:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:03,169 INFO L93 Difference]: Finished difference Result 865 states and 989 transitions. [2020-10-27 01:08:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:08:03,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-27 01:08:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:03,173 INFO L225 Difference]: With dead ends: 865 [2020-10-27 01:08:03,173 INFO L226 Difference]: Without dead ends: 848 [2020-10-27 01:08:03,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:08:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-10-27 01:08:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 754. [2020-10-27 01:08:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-10-27 01:08:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 856 transitions. [2020-10-27 01:08:03,267 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 856 transitions. Word has length 67 [2020-10-27 01:08:03,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:03,267 INFO L481 AbstractCegarLoop]: Abstraction has 754 states and 856 transitions. [2020-10-27 01:08:03,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 856 transitions. [2020-10-27 01:08:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:08:03,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:03,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:03,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:08:03,269 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:03,270 INFO L82 PathProgramCache]: Analyzing trace with hash 491038451, now seen corresponding path program 1 times [2020-10-27 01:08:03,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:03,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899363826] [2020-10-27 01:08:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:03,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:03,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:03,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:04,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:06,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:08:06,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:08:06,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-10-27 01:08:06,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:08:06,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:06,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:06,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:06,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:06,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:06,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:06,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:06,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:08:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:06,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899363826] [2020-10-27 01:08:06,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:06,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:06,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889958227] [2020-10-27 01:08:06,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:06,815 INFO L87 Difference]: Start difference. First operand 754 states and 856 transitions. Second operand 13 states. [2020-10-27 01:08:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:08,743 INFO L93 Difference]: Finished difference Result 995 states and 1173 transitions. [2020-10-27 01:08:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:08,743 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-27 01:08:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:08,747 INFO L225 Difference]: With dead ends: 995 [2020-10-27 01:08:08,747 INFO L226 Difference]: Without dead ends: 991 [2020-10-27 01:08:08,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:08:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2020-10-27 01:08:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 766. [2020-10-27 01:08:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-27 01:08:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 868 transitions. [2020-10-27 01:08:08,816 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 868 transitions. Word has length 67 [2020-10-27 01:08:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:08,817 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 868 transitions. [2020-10-27 01:08:08,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 868 transitions. [2020-10-27 01:08:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:08:08,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:08,818 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:08,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:08:08,818 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1738074147, now seen corresponding path program 1 times [2020-10-27 01:08:08,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:08,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970322041] [2020-10-27 01:08:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:08,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:08,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:13,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:13,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:08:13,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:08:13,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4815 [2020-10-27 01:08:13,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:13,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:08:13,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:13,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:08:13,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:13,969 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-27 01:08:14,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:14,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:14,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:14,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:14,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:14,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:14,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:14,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:14,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:14,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:14,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:08:14,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970322041] [2020-10-27 01:08:14,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:14,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:08:14,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681515378] [2020-10-27 01:08:14,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:08:14,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:14,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:08:14,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:08:14,244 INFO L87 Difference]: Start difference. First operand 766 states and 868 transitions. Second operand 9 states. [2020-10-27 01:08:14,863 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-27 01:08:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:15,423 INFO L93 Difference]: Finished difference Result 775 states and 876 transitions. [2020-10-27 01:08:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:08:15,424 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-27 01:08:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:15,426 INFO L225 Difference]: With dead ends: 775 [2020-10-27 01:08:15,426 INFO L226 Difference]: Without dead ends: 734 [2020-10-27 01:08:15,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-10-27 01:08:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 732. [2020-10-27 01:08:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-10-27 01:08:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 832 transitions. [2020-10-27 01:08:15,491 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 832 transitions. Word has length 69 [2020-10-27 01:08:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:15,491 INFO L481 AbstractCegarLoop]: Abstraction has 732 states and 832 transitions. [2020-10-27 01:08:15,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:08:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 832 transitions. [2020-10-27 01:08:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:08:15,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:15,492 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:15,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:08:15,493 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1985377431, now seen corresponding path program 2 times [2020-10-27 01:08:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:15,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438692328] [2020-10-27 01:08:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:15,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:15,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:15,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:17,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:20,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:20,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:08:20,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:08:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 01:08:20,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:08:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:21,011 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-10-27 01:08:21,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:21,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:21,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:21,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:21,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:21,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:08:21,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:21,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:08:21,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438692328] [2020-10-27 01:08:21,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:21,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:21,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455367877] [2020-10-27 01:08:21,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:21,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:21,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:21,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:21,220 INFO L87 Difference]: Start difference. First operand 732 states and 832 transitions. Second operand 12 states. [2020-10-27 01:08:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:22,820 INFO L93 Difference]: Finished difference Result 916 states and 1071 transitions. [2020-10-27 01:08:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:22,821 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-10-27 01:08:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:22,824 INFO L225 Difference]: With dead ends: 916 [2020-10-27 01:08:22,824 INFO L226 Difference]: Without dead ends: 886 [2020-10-27 01:08:22,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2020-10-27 01:08:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 740. [2020-10-27 01:08:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-10-27 01:08:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 837 transitions. [2020-10-27 01:08:22,893 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 837 transitions. Word has length 70 [2020-10-27 01:08:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:22,893 INFO L481 AbstractCegarLoop]: Abstraction has 740 states and 837 transitions. [2020-10-27 01:08:22,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 837 transitions. [2020-10-27 01:08:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:08:22,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:22,895 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:22,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:08:22,895 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:22,895 INFO L82 PathProgramCache]: Analyzing trace with hash 558528436, now seen corresponding path program 3 times [2020-10-27 01:08:22,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:22,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037034264] [2020-10-27 01:08:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:23,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:25,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:27,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:27,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:08:27,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:27,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:08:27,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:08:27,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:28,402 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-27 01:08:28,557 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-27 01:08:28,691 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 01:08:28,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:28,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:28,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:28,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:28,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:28,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:28,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:28,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:28,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:28,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:28,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:29,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037034264] [2020-10-27 01:08:29,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:29,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:29,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403032087] [2020-10-27 01:08:29,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:29,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:29,036 INFO L87 Difference]: Start difference. First operand 740 states and 837 transitions. Second operand 13 states. [2020-10-27 01:08:29,426 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-27 01:08:29,787 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-27 01:08:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:30,990 INFO L93 Difference]: Finished difference Result 844 states and 969 transitions. [2020-10-27 01:08:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:08:30,990 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-10-27 01:08:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:30,993 INFO L225 Difference]: With dead ends: 844 [2020-10-27 01:08:30,993 INFO L226 Difference]: Without dead ends: 840 [2020-10-27 01:08:30,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:08:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-10-27 01:08:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 740. [2020-10-27 01:08:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-10-27 01:08:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 835 transitions. [2020-10-27 01:08:31,084 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 835 transitions. Word has length 71 [2020-10-27 01:08:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:31,084 INFO L481 AbstractCegarLoop]: Abstraction has 740 states and 835 transitions. [2020-10-27 01:08:31,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 835 transitions. [2020-10-27 01:08:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:08:31,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:31,086 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:31,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:08:31,086 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1895582526, now seen corresponding path program 1 times [2020-10-27 01:08:31,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:31,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015399321] [2020-10-27 01:08:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:31,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:36,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:36,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:08:36,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:08:36,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4922 [2020-10-27 01:08:36,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:36,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:36,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:36,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:08:36,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:36,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:36,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:36,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:36,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:36,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:36,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:36,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015399321] [2020-10-27 01:08:36,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:36,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:36,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103657421] [2020-10-27 01:08:36,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:36,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:36,346 INFO L87 Difference]: Start difference. First operand 740 states and 835 transitions. Second operand 13 states. [2020-10-27 01:08:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:38,414 INFO L93 Difference]: Finished difference Result 1064 states and 1255 transitions. [2020-10-27 01:08:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:08:38,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-27 01:08:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:38,418 INFO L225 Difference]: With dead ends: 1064 [2020-10-27 01:08:38,418 INFO L226 Difference]: Without dead ends: 915 [2020-10-27 01:08:38,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2020-10-27 01:08:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 752. [2020-10-27 01:08:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-10-27 01:08:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 847 transitions. [2020-10-27 01:08:38,488 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 847 transitions. Word has length 72 [2020-10-27 01:08:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:38,488 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 847 transitions. [2020-10-27 01:08:38,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 847 transitions. [2020-10-27 01:08:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:08:38,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:38,489 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:38,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:08:38,490 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash 639380986, now seen corresponding path program 3 times [2020-10-27 01:08:38,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:38,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186672875] [2020-10-27 01:08:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:38,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:38,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:38,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:40,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:43,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:43,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:08:43,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:08:43,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:08:43,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:08:43,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:43,795 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 01:08:43,970 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-27 01:08:44,156 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-27 01:08:44,319 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-27 01:08:44,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:44,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:44,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:44,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:44,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:44,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:44,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:44,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:44,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186672875] [2020-10-27 01:08:44,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:44,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:44,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505291916] [2020-10-27 01:08:44,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:44,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:44,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:44,586 INFO L87 Difference]: Start difference. First operand 752 states and 847 transitions. Second operand 14 states. [2020-10-27 01:08:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:47,017 INFO L93 Difference]: Finished difference Result 1185 states and 1382 transitions. [2020-10-27 01:08:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:08:47,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-27 01:08:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:47,021 INFO L225 Difference]: With dead ends: 1185 [2020-10-27 01:08:47,021 INFO L226 Difference]: Without dead ends: 1106 [2020-10-27 01:08:47,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:08:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2020-10-27 01:08:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 904. [2020-10-27 01:08:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-10-27 01:08:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1012 transitions. [2020-10-27 01:08:47,125 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1012 transitions. Word has length 73 [2020-10-27 01:08:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:47,125 INFO L481 AbstractCegarLoop]: Abstraction has 904 states and 1012 transitions. [2020-10-27 01:08:47,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1012 transitions. [2020-10-27 01:08:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:08:47,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:47,127 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:47,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:08:47,127 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:47,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1810219144, now seen corresponding path program 4 times [2020-10-27 01:08:47,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:47,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592926656] [2020-10-27 01:08:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:47,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking...