/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:45:57,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:45:57,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:45:57,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:45:57,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:45:57,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:45:57,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:45:57,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:45:57,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:45:57,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:45:57,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:45:57,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:45:57,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:45:57,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:45:57,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:45:57,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:45:57,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:45:57,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:45:57,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:45:57,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:45:57,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:45:57,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:45:57,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:45:57,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:45:57,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:45:57,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:45:57,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:45:57,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:45:57,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:45:57,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:45:57,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:45:57,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:45:57,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:45:57,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:45:57,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:45:57,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:45:57,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:45:57,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:45:57,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:45:57,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:45:57,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:45:57,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:45:57,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:45:57,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:45:57,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:45:57,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:45:57,646 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:45:57,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:45:57,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:45:57,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:45:57,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:45:57,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:45:57,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:45:57,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:45:57,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:45:57,648 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:45:57,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:45:57,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:45:57,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:45:57,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:45:57,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:45:57,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:45:57,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:45:57,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:45:57,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:45:57,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:45:57,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:45:57,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:45:57,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:45:57,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:45:57,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:45:57,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:45:58,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:45:58,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:45:58,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:45:58,171 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:45:58,171 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:45:58,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-27 19:45:58,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2a4946df/21a6829c8e434c88b49e2c73aca5a442/FLAG8f5677bdb [2020-10-27 19:45:59,119 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:45:59,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-27 19:45:59,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2a4946df/21a6829c8e434c88b49e2c73aca5a442/FLAG8f5677bdb [2020-10-27 19:45:59,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2a4946df/21a6829c8e434c88b49e2c73aca5a442 [2020-10-27 19:45:59,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:45:59,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:45:59,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:45:59,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:45:59,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:45:59,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b0f0983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59, skipping insertion in model container [2020-10-27 19:45:59,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:45:59,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:45:59,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:45:59,807 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:45:59,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:45:59,930 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:45:59,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59 WrapperNode [2020-10-27 19:45:59,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:45:59,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:45:59,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:45:59,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:45:59,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:46:00,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:46:00,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:46:00,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:46:00,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:46:00,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:46:00,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:00,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:00,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:00,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:00,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:00,949 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:00,949 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 19:46:00,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:00 BoogieIcfgContainer [2020-10-27 19:46:00,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:00,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:00,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:00,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:00,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:45:59" (1/3) ... [2020-10-27 19:46:00,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dda21ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:00, skipping insertion in model container [2020-10-27 19:46:00,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (2/3) ... [2020-10-27 19:46:00,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dda21ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:00, skipping insertion in model container [2020-10-27 19:46:00,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:00" (3/3) ... [2020-10-27 19:46:00,971 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2020-10-27 19:46:00,987 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:00,994 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:01,012 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:01,054 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:01,054 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:01,054 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:01,055 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:01,062 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:01,062 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:01,062 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:01,062 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 19:46:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:46:01,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:01,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:01,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:01,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:01,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1827068410, now seen corresponding path program 1 times [2020-10-27 19:46:01,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:01,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664318915] [2020-10-27 19:46:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:46:02,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:02,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-27 19:46:02,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:02,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:46:02,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:02,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:46:02,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:02,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:02,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:02,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:02,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664318915] [2020-10-27 19:46:02,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:02,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:46:02,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985666835] [2020-10-27 19:46:02,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:46:02,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:02,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:46:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:02,318 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-27 19:46:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:02,478 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-10-27 19:46:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:46:02,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-27 19:46:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:02,492 INFO L225 Difference]: With dead ends: 64 [2020-10-27 19:46:02,492 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 19:46:02,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 19:46:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 19:46:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 19:46:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-27 19:46:02,549 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 21 [2020-10-27 19:46:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:02,549 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-27 19:46:02,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:46:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-27 19:46:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:02,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:02,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:02,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:02,551 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:02,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1663384491, now seen corresponding path program 1 times [2020-10-27 19:46:02,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:02,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61029984] [2020-10-27 19:46:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:02,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 19:46:02,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:02,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:03,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:03,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:03,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:03,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:03,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:03,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61029984] [2020-10-27 19:46:03,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:03,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:03,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754090912] [2020-10-27 19:46:03,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:03,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:03,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:03,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:03,090 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-10-27 19:46:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:03,629 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2020-10-27 19:46:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:03,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:46:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:03,634 INFO L225 Difference]: With dead ends: 74 [2020-10-27 19:46:03,634 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 19:46:03,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 19:46:03,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-27 19:46:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:46:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-27 19:46:03,663 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 22 [2020-10-27 19:46:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:03,663 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-27 19:46:03,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-27 19:46:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:03,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:03,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:03,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:03,665 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:03,666 INFO L82 PathProgramCache]: Analyzing trace with hash 111622871, now seen corresponding path program 1 times [2020-10-27 19:46:03,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:03,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783897957] [2020-10-27 19:46:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:04,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:04,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-27 19:46:04,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 19:46:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:04,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:04,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:04,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:04,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:04,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:04,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:04,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783897957] [2020-10-27 19:46:04,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:04,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:46:04,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552441564] [2020-10-27 19:46:04,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:04,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:04,691 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 7 states. [2020-10-27 19:46:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:05,094 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2020-10-27 19:46:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:05,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 19:46:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:05,096 INFO L225 Difference]: With dead ends: 61 [2020-10-27 19:46:05,096 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:46:05,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:46:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-27 19:46:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 19:46:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2020-10-27 19:46:05,106 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 22 [2020-10-27 19:46:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:05,107 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2020-10-27 19:46:05,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2020-10-27 19:46:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:05,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:05,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:05,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:05,109 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash 791681241, now seen corresponding path program 1 times [2020-10-27 19:46:05,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:05,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277005923] [2020-10-27 19:46:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:05,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:05,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-27 19:46:05,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:05,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:05,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:05,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:05,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:05,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:05,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:46:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:05,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277005923] [2020-10-27 19:46:05,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:05,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:05,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330461123] [2020-10-27 19:46:05,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:05,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:05,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:05,791 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 8 states. [2020-10-27 19:46:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:06,105 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2020-10-27 19:46:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:06,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:46:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:06,106 INFO L225 Difference]: With dead ends: 88 [2020-10-27 19:46:06,107 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 19:46:06,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 19:46:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 44. [2020-10-27 19:46:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 19:46:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-10-27 19:46:06,140 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 22 [2020-10-27 19:46:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:06,140 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-10-27 19:46:06,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-10-27 19:46:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:46:06,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:06,142 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] [2020-10-27 19:46:06,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:06,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:06,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:06,143 INFO L82 PathProgramCache]: Analyzing trace with hash 19277548, now seen corresponding path program 1 times [2020-10-27 19:46:06,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:06,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990877352] [2020-10-27 19:46:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:07,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:46:07,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:07,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1113 [2020-10-27 19:46:07,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:07,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:07,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:46:07,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:07,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:07,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:07,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:07,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:07,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:07,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:07,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:07,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:07,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:07,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:07,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:07,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990877352] [2020-10-27 19:46:07,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:07,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:07,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829979942] [2020-10-27 19:46:07,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:07,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:07,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:07,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:07,362 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-10-27 19:46:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:07,656 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2020-10-27 19:46:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:07,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 19:46:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:07,658 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:46:07,658 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 19:46:07,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 19:46:07,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 19:46:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 52. [2020-10-27 19:46:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:46:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-10-27 19:46:07,668 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 23 [2020-10-27 19:46:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:07,669 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-10-27 19:46:07,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-10-27 19:46:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:07,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:07,670 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:07,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:07,671 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:07,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1378432434, now seen corresponding path program 1 times [2020-10-27 19:46:07,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:07,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733430940] [2020-10-27 19:46:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:08,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:08,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:08,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-27 19:46:08,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:08,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:09,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:09,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:09,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:09,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:09,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:09,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733430940] [2020-10-27 19:46:09,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:09,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:09,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542041198] [2020-10-27 19:46:09,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:09,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:09,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:09,057 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 11 states. [2020-10-27 19:46:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:10,015 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2020-10-27 19:46:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:10,016 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 19:46:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:10,018 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:46:10,018 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:46:10,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:46:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:46:10,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2020-10-27 19:46:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 19:46:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2020-10-27 19:46:10,041 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 25 [2020-10-27 19:46:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:10,045 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2020-10-27 19:46:10,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:10,045 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2020-10-27 19:46:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:10,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:10,047 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:10,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:10,047 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:10,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1076633298, now seen corresponding path program 1 times [2020-10-27 19:46:10,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:10,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069967105] [2020-10-27 19:46:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:10,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:12,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-27 19:46:12,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:12,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:12,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:46:12,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:12,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:12,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:12,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:12,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:12,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069967105] [2020-10-27 19:46:12,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:12,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:12,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979103843] [2020-10-27 19:46:12,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:12,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:12,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:12,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:12,558 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand 9 states. [2020-10-27 19:46:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:13,213 INFO L93 Difference]: Finished difference Result 137 states and 182 transitions. [2020-10-27 19:46:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:13,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 19:46:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:13,215 INFO L225 Difference]: With dead ends: 137 [2020-10-27 19:46:13,215 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 19:46:13,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:13,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 19:46:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 63. [2020-10-27 19:46:13,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 19:46:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2020-10-27 19:46:13,227 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 25 [2020-10-27 19:46:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:13,227 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2020-10-27 19:46:13,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2020-10-27 19:46:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:13,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:13,229 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] [2020-10-27 19:46:13,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:13,229 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:13,230 INFO L82 PathProgramCache]: Analyzing trace with hash 243059799, now seen corresponding path program 1 times [2020-10-27 19:46:13,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:13,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041954889] [2020-10-27 19:46:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:16,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:18,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:46:18,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 19:46:18,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:18,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:46:18,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:18,639 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-10-27 19:46:18,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:18,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:18,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:18,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 19:46:18,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:18,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:18,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041954889] [2020-10-27 19:46:18,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:18,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:18,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122492445] [2020-10-27 19:46:18,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:18,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:18,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:18,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:18,950 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand 11 states. [2020-10-27 19:46:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:20,448 INFO L93 Difference]: Finished difference Result 182 states and 246 transitions. [2020-10-27 19:46:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:46:20,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 19:46:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:20,452 INFO L225 Difference]: With dead ends: 182 [2020-10-27 19:46:20,452 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 19:46:20,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:46:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 19:46:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2020-10-27 19:46:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 19:46:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2020-10-27 19:46:20,477 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 26 [2020-10-27 19:46:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:20,482 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2020-10-27 19:46:20,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2020-10-27 19:46:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:20,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:20,484 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] [2020-10-27 19:46:20,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:20,484 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash 923118169, now seen corresponding path program 1 times [2020-10-27 19:46:20,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:20,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534816070] [2020-10-27 19:46:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:20,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:24,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:46:24,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4045 [2020-10-27 19:46:24,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:24,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 19:46:24,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:24,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:24,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:24,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:24,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,609 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 19:46:24,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534816070] [2020-10-27 19:46:24,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:24,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:24,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761832303] [2020-10-27 19:46:24,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:24,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:24,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:24,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:24,611 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand 5 states. [2020-10-27 19:46:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:24,746 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2020-10-27 19:46:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:24,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-27 19:46:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:24,749 INFO L225 Difference]: With dead ends: 104 [2020-10-27 19:46:24,749 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 19:46:24,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 19:46:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-10-27 19:46:24,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:46:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2020-10-27 19:46:24,761 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 26 [2020-10-27 19:46:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:24,761 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2020-10-27 19:46:24,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2020-10-27 19:46:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:24,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:24,763 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] [2020-10-27 19:46:24,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:24,763 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:24,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1596841765, now seen corresponding path program 1 times [2020-10-27 19:46:24,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:24,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940164282] [2020-10-27 19:46:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:25,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:25,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:25,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-27 19:46:25,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:25,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:46:25,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:25,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:25,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:25,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:25,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:25,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:25,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:25,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:25,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:25,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:25,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:25,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940164282] [2020-10-27 19:46:25,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:25,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835298447] [2020-10-27 19:46:25,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:25,367 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand 10 states. [2020-10-27 19:46:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:26,065 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2020-10-27 19:46:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:26,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 19:46:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:26,067 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:46:26,067 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 19:46:26,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 19:46:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2020-10-27 19:46:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2020-10-27 19:46:26,080 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 26 [2020-10-27 19:46:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:26,081 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2020-10-27 19:46:26,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2020-10-27 19:46:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:26,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:26,083 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] [2020-10-27 19:46:26,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:26,083 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:26,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:26,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1685773215, now seen corresponding path program 1 times [2020-10-27 19:46:26,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:26,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859091583] [2020-10-27 19:46:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:27,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:27,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-27 19:46:27,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:27,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:28,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:28,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:28,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:28,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:46:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:28,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859091583] [2020-10-27 19:46:28,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:28,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:28,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215466457] [2020-10-27 19:46:28,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:28,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:28,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:28,052 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 12 states. [2020-10-27 19:46:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:28,616 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2020-10-27 19:46:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:28,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-27 19:46:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:28,621 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:46:28,621 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:46:28,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:46:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:46:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-27 19:46:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 19:46:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-10-27 19:46:28,640 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 26 [2020-10-27 19:46:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:28,641 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-10-27 19:46:28,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-10-27 19:46:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:28,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:28,647 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] [2020-10-27 19:46:28,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:28,648 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1672684518, now seen corresponding path program 1 times [2020-10-27 19:46:28,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:28,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311624507] [2020-10-27 19:46:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:28,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 19:46:28,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:28,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:28,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:28,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:28,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:28,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:28,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:28,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:28,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:28,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311624507] [2020-10-27 19:46:28,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:28,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:46:28,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212254178] [2020-10-27 19:46:28,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:28,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:28,928 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 7 states. [2020-10-27 19:46:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:29,231 INFO L93 Difference]: Finished difference Result 107 states and 136 transitions. [2020-10-27 19:46:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:29,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 19:46:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:29,233 INFO L225 Difference]: With dead ends: 107 [2020-10-27 19:46:29,233 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 19:46:29,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 19:46:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 19:46:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 19:46:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2020-10-27 19:46:29,244 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 32 [2020-10-27 19:46:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:29,245 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2020-10-27 19:46:29,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2020-10-27 19:46:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:29,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:29,246 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] [2020-10-27 19:46:29,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:29,246 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:29,247 INFO L82 PathProgramCache]: Analyzing trace with hash -331841837, now seen corresponding path program 1 times [2020-10-27 19:46:29,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:29,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927773342] [2020-10-27 19:46:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:29,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:30,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:30,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1491 [2020-10-27 19:46:30,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:30,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:30,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:46:30,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:31,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:31,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:31,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:31,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:31,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:31,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927773342] [2020-10-27 19:46:31,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:31,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:31,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428801869] [2020-10-27 19:46:31,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:31,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:31,122 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand 11 states. [2020-10-27 19:46:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:32,294 INFO L93 Difference]: Finished difference Result 172 states and 223 transitions. [2020-10-27 19:46:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:46:32,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 19:46:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:32,296 INFO L225 Difference]: With dead ends: 172 [2020-10-27 19:46:32,296 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 19:46:32,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:46:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 19:46:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2020-10-27 19:46:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 19:46:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2020-10-27 19:46:32,316 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 35 [2020-10-27 19:46:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:32,317 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2020-10-27 19:46:32,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2020-10-27 19:46:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:32,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:32,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:32,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:32,318 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2123223895, now seen corresponding path program 1 times [2020-10-27 19:46:32,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:32,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62797814] [2020-10-27 19:46:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:37,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:37,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:46:37,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4793 [2020-10-27 19:46:37,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:46:37,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:37,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:37,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:37,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:37,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:37,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:37,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:37,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:37,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:37,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:37,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:37,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62797814] [2020-10-27 19:46:37,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:37,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:37,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065439972] [2020-10-27 19:46:37,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:37,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:37,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:37,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:37,547 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand 11 states. [2020-10-27 19:46:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:38,410 INFO L93 Difference]: Finished difference Result 166 states and 215 transitions. [2020-10-27 19:46:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:46:38,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 19:46:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:38,412 INFO L225 Difference]: With dead ends: 166 [2020-10-27 19:46:38,412 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 19:46:38,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:46:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 19:46:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2020-10-27 19:46:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 19:46:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-10-27 19:46:38,428 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 35 [2020-10-27 19:46:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:38,428 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-10-27 19:46:38,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-10-27 19:46:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:46:38,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:38,430 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] [2020-10-27 19:46:38,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:46:38,431 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:38,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1334779298, now seen corresponding path program 1 times [2020-10-27 19:46:38,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:38,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347861524] [2020-10-27 19:46:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:38,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:42,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:42,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:43,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:46:43,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 19:46:43,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 19:46:43,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:43,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:43,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:43,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:46:43,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:43,715 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-10-27 19:46:43,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:43,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:43,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:43,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:43,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:43,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:43,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347861524] [2020-10-27 19:46:43,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:43,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:43,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903713632] [2020-10-27 19:46:43,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:43,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:43,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:43,965 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 12 states. [2020-10-27 19:46:44,459 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 19:46:44,610 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-10-27 19:46:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:45,833 INFO L93 Difference]: Finished difference Result 208 states and 266 transitions. [2020-10-27 19:46:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:46:45,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-27 19:46:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:45,835 INFO L225 Difference]: With dead ends: 208 [2020-10-27 19:46:45,835 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 19:46:45,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:46:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 19:46:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 139. [2020-10-27 19:46:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 19:46:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2020-10-27 19:46:45,854 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 36 [2020-10-27 19:46:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:45,854 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2020-10-27 19:46:45,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2020-10-27 19:46:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:46:45,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:45,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:45,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:46:45,855 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash -505122266, now seen corresponding path program 1 times [2020-10-27 19:46:45,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:45,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91318159] [2020-10-27 19:46:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:45,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:47,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:47,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:46:47,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:46:47,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1991 [2020-10-27 19:46:47,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:46:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:48,156 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2020-10-27 19:46:48,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:48,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:48,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:48,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:48,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:48,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:48,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:48,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:48,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:48,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91318159] [2020-10-27 19:46:48,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:48,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:48,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455705097] [2020-10-27 19:46:48,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:48,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:48,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:48,351 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand 10 states. [2020-10-27 19:46:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:49,310 INFO L93 Difference]: Finished difference Result 177 states and 227 transitions. [2020-10-27 19:46:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:46:49,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-27 19:46:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:49,320 INFO L225 Difference]: With dead ends: 177 [2020-10-27 19:46:49,320 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 19:46:49,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:46:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 19:46:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 139. [2020-10-27 19:46:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 19:46:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2020-10-27 19:46:49,350 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 36 [2020-10-27 19:46:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:49,352 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2020-10-27 19:46:49,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2020-10-27 19:46:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:46:49,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:49,354 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] [2020-10-27 19:46:49,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:46:49,355 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1516615034, now seen corresponding path program 2 times [2020-10-27 19:46:49,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:49,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559293493] [2020-10-27 19:46:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:52,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:46:52,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2832 [2020-10-27 19:46:52,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:52,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:46:52,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:52,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:46:52,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:52,558 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-10-27 19:46:52,966 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-27 19:46:53,346 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-27 19:46:53,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:53,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:53,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:53,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:53,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:53,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:53,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:53,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:53,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:53,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:53,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:53,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559293493] [2020-10-27 19:46:53,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:53,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:46:53,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121130733] [2020-10-27 19:46:53,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:46:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:53,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:46:53,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:53,788 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand 14 states. [2020-10-27 19:46:54,149 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-27 19:46:54,366 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2020-10-27 19:46:54,820 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 19:46:55,050 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 19:46:55,367 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-27 19:46:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:56,279 INFO L93 Difference]: Finished difference Result 264 states and 341 transitions. [2020-10-27 19:46:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:46:56,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 19:46:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:56,282 INFO L225 Difference]: With dead ends: 264 [2020-10-27 19:46:56,282 INFO L226 Difference]: Without dead ends: 245 [2020-10-27 19:46:56,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:46:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-27 19:46:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-10-27 19:46:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 19:46:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2020-10-27 19:46:56,308 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 38 [2020-10-27 19:46:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:56,309 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2020-10-27 19:46:56,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:46:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2020-10-27 19:46:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:46:56,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:56,310 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:56,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:46:56,310 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash -323286530, now seen corresponding path program 2 times [2020-10-27 19:46:56,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:56,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403936311] [2020-10-27 19:46:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:56,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:59,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:59,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:01,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:01,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:47:01,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 19:47:01,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:01,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:01,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:01,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:01,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:01,942 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-27 19:47:02,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:02,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:02,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:02,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:02,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:02,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:02,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:02,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:02,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:02,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:02,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403936311] [2020-10-27 19:47:02,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:02,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:02,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957357998] [2020-10-27 19:47:02,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:02,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:02,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:02,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:02,196 INFO L87 Difference]: Start difference. First operand 176 states and 230 transitions. Second operand 13 states. [2020-10-27 19:47:02,612 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-27 19:47:02,803 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-27 19:47:03,169 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 19:47:03,329 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-27 19:47:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:03,929 INFO L93 Difference]: Finished difference Result 289 states and 377 transitions. [2020-10-27 19:47:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:47:03,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 19:47:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:03,935 INFO L225 Difference]: With dead ends: 289 [2020-10-27 19:47:03,935 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 19:47:03,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:47:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 19:47:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 185. [2020-10-27 19:47:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-27 19:47:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 244 transitions. [2020-10-27 19:47:03,967 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 244 transitions. Word has length 38 [2020-10-27 19:47:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:03,967 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 244 transitions. [2020-10-27 19:47:03,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 244 transitions. [2020-10-27 19:47:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:03,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:03,968 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] [2020-10-27 19:47:03,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:47:03,968 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1492599845, now seen corresponding path program 1 times [2020-10-27 19:47:03,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:03,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236191322] [2020-10-27 19:47:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:04,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:06,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:06,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:06,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2054 [2020-10-27 19:47:06,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:06,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:47:06,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:06,363 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-27 19:47:06,542 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-27 19:47:06,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:06,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:06,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:06,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:06,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:47:06,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:06,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:06,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236191322] [2020-10-27 19:47:06,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:06,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:06,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157624107] [2020-10-27 19:47:06,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:06,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:06,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:06,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:06,850 INFO L87 Difference]: Start difference. First operand 185 states and 244 transitions. Second operand 14 states. [2020-10-27 19:47:07,237 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-27 19:47:07,522 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-27 19:47:07,714 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-27 19:47:08,038 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 19:47:08,284 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 19:47:08,707 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-27 19:47:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:09,516 INFO L93 Difference]: Finished difference Result 298 states and 385 transitions. [2020-10-27 19:47:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:47:09,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 19:47:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:09,530 INFO L225 Difference]: With dead ends: 298 [2020-10-27 19:47:09,530 INFO L226 Difference]: Without dead ends: 279 [2020-10-27 19:47:09,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:47:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-27 19:47:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 222. [2020-10-27 19:47:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 19:47:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 293 transitions. [2020-10-27 19:47:09,566 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 293 transitions. Word has length 39 [2020-10-27 19:47:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:09,566 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 293 transitions. [2020-10-27 19:47:09,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 293 transitions. [2020-10-27 19:47:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:09,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:09,568 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] [2020-10-27 19:47:09,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:47:09,568 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:09,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:09,569 INFO L82 PathProgramCache]: Analyzing trace with hash 962465887, now seen corresponding path program 1 times [2020-10-27 19:47:09,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:09,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830975319] [2020-10-27 19:47:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:09,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:09,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:11,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:11,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:14,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:14,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:14,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:47:14,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 19:47:14,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:14,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:14,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:14,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:15,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:15,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:15,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:15,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:15,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:15,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:15,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:15,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:15,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:15,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:15,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:15,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830975319] [2020-10-27 19:47:15,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:15,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:15,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195622994] [2020-10-27 19:47:15,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:15,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:15,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:15,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:15,188 INFO L87 Difference]: Start difference. First operand 222 states and 293 transitions. Second operand 12 states. [2020-10-27 19:47:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:16,163 INFO L93 Difference]: Finished difference Result 272 states and 354 transitions. [2020-10-27 19:47:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:47:16,164 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 19:47:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:16,166 INFO L225 Difference]: With dead ends: 272 [2020-10-27 19:47:16,166 INFO L226 Difference]: Without dead ends: 253 [2020-10-27 19:47:16,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:47:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-27 19:47:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 194. [2020-10-27 19:47:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 19:47:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 259 transitions. [2020-10-27 19:47:16,200 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 259 transitions. Word has length 39 [2020-10-27 19:47:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:16,200 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 259 transitions. [2020-10-27 19:47:16,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 259 transitions. [2020-10-27 19:47:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:16,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:16,202 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] [2020-10-27 19:47:16,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:47:16,202 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2004906059, now seen corresponding path program 2 times [2020-10-27 19:47:16,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:16,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024629918] [2020-10-27 19:47:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:16,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:17,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:21,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:21,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:47:21,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 19:47:21,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:21,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:21,604 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-10-27 19:47:21,777 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-27 19:47:22,687 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 51 [2020-10-27 19:47:22,877 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-27 19:47:23,064 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-27 19:47:23,187 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2020-10-27 19:47:23,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:23,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:23,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:23,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:23,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:23,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:23,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024629918] [2020-10-27 19:47:23,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:23,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:47:23,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064002662] [2020-10-27 19:47:23,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:47:23,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:23,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:47:23,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:23,475 INFO L87 Difference]: Start difference. First operand 194 states and 259 transitions. Second operand 15 states. [2020-10-27 19:47:24,239 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-27 19:47:24,513 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-27 19:47:24,843 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 70 [2020-10-27 19:47:25,642 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-10-27 19:47:26,117 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 19:47:26,340 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-27 19:47:26,550 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 19:47:26,743 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 19:47:26,919 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-27 19:47:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:27,079 INFO L93 Difference]: Finished difference Result 335 states and 436 transitions. [2020-10-27 19:47:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:47:27,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 19:47:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:27,081 INFO L225 Difference]: With dead ends: 335 [2020-10-27 19:47:27,081 INFO L226 Difference]: Without dead ends: 331 [2020-10-27 19:47:27,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=218, Invalid=838, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:47:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-27 19:47:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 234. [2020-10-27 19:47:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 19:47:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 314 transitions. [2020-10-27 19:47:27,119 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 314 transitions. Word has length 39 [2020-10-27 19:47:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:27,119 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 314 transitions. [2020-10-27 19:47:27,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:47:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 314 transitions. [2020-10-27 19:47:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:27,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:27,120 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] [2020-10-27 19:47:27,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:47:27,121 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash 165004495, now seen corresponding path program 2 times [2020-10-27 19:47:27,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:27,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363219758] [2020-10-27 19:47:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:27,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:29,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:29,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:32,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:32,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:47:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 19:47:32,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:32,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:32,694 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-27 19:47:33,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:33,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:33,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:33,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:33,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:33,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:33,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:33,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:33,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:33,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:33,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:33,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363219758] [2020-10-27 19:47:33,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:33,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:47:33,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077052388] [2020-10-27 19:47:33,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:47:33,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:33,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:47:33,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:33,130 INFO L87 Difference]: Start difference. First operand 234 states and 314 transitions. Second operand 16 states. [2020-10-27 19:47:34,409 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-27 19:47:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:36,243 INFO L93 Difference]: Finished difference Result 468 states and 603 transitions. [2020-10-27 19:47:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 19:47:36,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 19:47:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:36,249 INFO L225 Difference]: With dead ends: 468 [2020-10-27 19:47:36,250 INFO L226 Difference]: Without dead ends: 464 [2020-10-27 19:47:36,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:47:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-10-27 19:47:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 283. [2020-10-27 19:47:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-27 19:47:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 383 transitions. [2020-10-27 19:47:36,304 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 383 transitions. Word has length 39 [2020-10-27 19:47:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:36,305 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 383 transitions. [2020-10-27 19:47:36,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:47:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 383 transitions. [2020-10-27 19:47:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:47:36,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:36,306 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:36,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:47:36,306 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1175410317, now seen corresponding path program 3 times [2020-10-27 19:47:36,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:36,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267920762] [2020-10-27 19:47:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:36,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:39,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:47:39,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:39,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3428 [2020-10-27 19:47:39,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:47:39,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:40,301 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 19:47:40,666 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-27 19:47:41,015 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-27 19:47:41,450 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-27 19:47:41,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:41,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:41,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:41,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:41,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:41,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:41,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:41,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267920762] [2020-10-27 19:47:41,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:41,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:47:41,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953887956] [2020-10-27 19:47:41,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:47:41,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:47:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:41,713 INFO L87 Difference]: Start difference. First operand 283 states and 383 transitions. Second operand 16 states. [2020-10-27 19:47:42,113 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2020-10-27 19:47:42,519 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 19:47:42,697 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2020-10-27 19:47:43,192 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2020-10-27 19:47:43,955 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-10-27 19:47:44,559 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-27 19:47:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:45,490 INFO L93 Difference]: Finished difference Result 402 states and 530 transitions. [2020-10-27 19:47:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:47:45,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 19:47:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:45,493 INFO L225 Difference]: With dead ends: 402 [2020-10-27 19:47:45,493 INFO L226 Difference]: Without dead ends: 383 [2020-10-27 19:47:45,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:47:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-27 19:47:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 249. [2020-10-27 19:47:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-27 19:47:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 341 transitions. [2020-10-27 19:47:45,545 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 341 transitions. Word has length 41 [2020-10-27 19:47:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:45,545 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 341 transitions. [2020-10-27 19:47:45,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:47:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 341 transitions. [2020-10-27 19:47:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:47:45,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:45,547 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:45,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:47:45,547 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:45,547 INFO L82 PathProgramCache]: Analyzing trace with hash 953960194, now seen corresponding path program 3 times [2020-10-27 19:47:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:45,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706470642] [2020-10-27 19:47:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:45,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:46,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:47,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:49,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:49,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:47:49,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:49,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4182 [2020-10-27 19:47:49,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:47:49,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:50,220 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-27 19:47:50,484 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-27 19:47:50,770 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-27 19:47:51,001 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-27 19:47:51,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:51,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:51,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:51,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:51,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:47:51,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:51,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:51,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:51,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:51,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:51,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706470642] [2020-10-27 19:47:51,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:51,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:47:51,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533880077] [2020-10-27 19:47:51,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:47:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:51,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:47:51,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:51,414 INFO L87 Difference]: Start difference. First operand 249 states and 341 transitions. Second operand 16 states. [2020-10-27 19:47:51,779 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-27 19:47:51,974 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-27 19:47:52,173 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 19:47:52,572 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-27 19:47:52,964 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-10-27 19:47:53,498 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-27 19:47:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:54,372 INFO L93 Difference]: Finished difference Result 371 states and 493 transitions. [2020-10-27 19:47:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:47:54,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-27 19:47:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:54,376 INFO L225 Difference]: With dead ends: 371 [2020-10-27 19:47:54,376 INFO L226 Difference]: Without dead ends: 352 [2020-10-27 19:47:54,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:47:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-27 19:47:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 286. [2020-10-27 19:47:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-27 19:47:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 390 transitions. [2020-10-27 19:47:54,433 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 390 transitions. Word has length 42 [2020-10-27 19:47:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:54,434 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 390 transitions. [2020-10-27 19:47:54,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:47:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 390 transitions. [2020-10-27 19:47:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:47:54,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:54,435 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:54,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:47:54,437 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash -885941370, now seen corresponding path program 3 times [2020-10-27 19:47:54,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:54,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277355905] [2020-10-27 19:47:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:54,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:56,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:56,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:56,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:59,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:59,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:59,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:47:59,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:47:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5137 [2020-10-27 19:47:59,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:00,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:00,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:00,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:00,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:00,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:00,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:00,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:00,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:00,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:00,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:00,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:00,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277355905] [2020-10-27 19:48:00,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:00,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:00,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092768547] [2020-10-27 19:48:00,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:00,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:00,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:00,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:00,420 INFO L87 Difference]: Start difference. First operand 286 states and 390 transitions. Second operand 15 states. [2020-10-27 19:48:00,876 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-10-27 19:48:01,066 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2020-10-27 19:48:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:02,045 INFO L93 Difference]: Finished difference Result 394 states and 530 transitions. [2020-10-27 19:48:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:48:02,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 19:48:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:02,047 INFO L225 Difference]: With dead ends: 394 [2020-10-27 19:48:02,047 INFO L226 Difference]: Without dead ends: 375 [2020-10-27 19:48:02,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:48:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-27 19:48:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 280. [2020-10-27 19:48:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-27 19:48:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 380 transitions. [2020-10-27 19:48:02,096 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 380 transitions. Word has length 42 [2020-10-27 19:48:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:02,096 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 380 transitions. [2020-10-27 19:48:02,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 380 transitions. [2020-10-27 19:48:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:48:02,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:02,098 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:48:02,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:48:02,098 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:02,098 INFO L82 PathProgramCache]: Analyzing trace with hash 156498802, now seen corresponding path program 4 times [2020-10-27 19:48:02,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:02,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323580978] [2020-10-27 19:48:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:02,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:03,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:03,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:06,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:07,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:07,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:48:07,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:48:07,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 19:48:07,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:07,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:07,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:07,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:48:07,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:07,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:07,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:07,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:07,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:07,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:07,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:07,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:07,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:07,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323580978] [2020-10-27 19:48:07,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:07,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:07,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136885749] [2020-10-27 19:48:07,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:07,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:07,762 INFO L87 Difference]: Start difference. First operand 280 states and 380 transitions. Second operand 14 states. [2020-10-27 19:48:08,573 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 19:48:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:09,522 INFO L93 Difference]: Finished difference Result 378 states and 501 transitions. [2020-10-27 19:48:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:48:09,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-27 19:48:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:09,525 INFO L225 Difference]: With dead ends: 378 [2020-10-27 19:48:09,525 INFO L226 Difference]: Without dead ends: 359 [2020-10-27 19:48:09,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:48:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-27 19:48:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 234. [2020-10-27 19:48:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 19:48:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 317 transitions. [2020-10-27 19:48:09,587 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 317 transitions. Word has length 42 [2020-10-27 19:48:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:09,587 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 317 transitions. [2020-10-27 19:48:09,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 317 transitions. [2020-10-27 19:48:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:48:09,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:09,589 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:48:09,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:48:09,589 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1551716094, now seen corresponding path program 5 times [2020-10-27 19:48:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:09,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741274905] [2020-10-27 19:48:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:10,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:11,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:13,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:15,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:15,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:48:15,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:48:15,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5273 [2020-10-27 19:48:15,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:15,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:48:15,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:15,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:48:15,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,653 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-27 19:48:15,994 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-27 19:48:16,203 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-27 19:48:16,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:16,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:16,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:16,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:16,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:48:16,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:16,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:16,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741274905] [2020-10-27 19:48:16,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:16,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:48:16,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761337219] [2020-10-27 19:48:16,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:48:16,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:16,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:48:16,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:16,662 INFO L87 Difference]: Start difference. First operand 234 states and 317 transitions. Second operand 18 states. [2020-10-27 19:48:17,298 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-27 19:48:17,738 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 65 [2020-10-27 19:48:18,103 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-27 19:48:18,414 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2020-10-27 19:48:18,639 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-27 19:48:18,961 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-27 19:48:19,281 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 19:48:19,724 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-27 19:48:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:21,213 INFO L93 Difference]: Finished difference Result 493 states and 649 transitions. [2020-10-27 19:48:21,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 19:48:21,213 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-27 19:48:21,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:21,215 INFO L225 Difference]: With dead ends: 493 [2020-10-27 19:48:21,215 INFO L226 Difference]: Without dead ends: 474 [2020-10-27 19:48:21,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:48:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-27 19:48:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2020-10-27 19:48:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-27 19:48:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 411 transitions. [2020-10-27 19:48:21,282 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 411 transitions. Word has length 42 [2020-10-27 19:48:21,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:21,282 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 411 transitions. [2020-10-27 19:48:21,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:48:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 411 transitions. [2020-10-27 19:48:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:48:21,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:21,284 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:48:21,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:48:21,284 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash 903349638, now seen corresponding path program 4 times [2020-10-27 19:48:21,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:21,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043197170] [2020-10-27 19:48:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:21,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:22,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:22,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:24,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:25,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:26,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:26,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:48:26,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:48:26,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 19:48:26,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:26,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:48:26,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:26,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 19:48:26,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:26,866 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-27 19:48:27,034 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-27 19:48:27,389 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 19:48:27,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:27,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:27,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:27,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:48:27,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:27,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043197170] [2020-10-27 19:48:27,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:27,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:48:27,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405698182] [2020-10-27 19:48:27,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:48:27,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:27,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:48:27,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:27,786 INFO L87 Difference]: Start difference. First operand 298 states and 411 transitions. Second operand 17 states. [2020-10-27 19:48:28,453 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-27 19:48:28,902 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-27 19:48:29,251 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-27 19:48:29,570 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-10-27 19:48:30,299 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-27 19:48:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:31,522 INFO L93 Difference]: Finished difference Result 525 states and 691 transitions. [2020-10-27 19:48:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:48:31,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-27 19:48:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:31,526 INFO L225 Difference]: With dead ends: 525 [2020-10-27 19:48:31,526 INFO L226 Difference]: Without dead ends: 521 [2020-10-27 19:48:31,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=300, Invalid=1422, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 19:48:31,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-27 19:48:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 282. [2020-10-27 19:48:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-27 19:48:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 398 transitions. [2020-10-27 19:48:31,593 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 398 transitions. Word has length 42 [2020-10-27 19:48:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:31,594 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 398 transitions. [2020-10-27 19:48:31,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:48:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 398 transitions. [2020-10-27 19:48:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:48:31,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:31,595 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:48:31,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:48:31,595 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:31,596 INFO L82 PathProgramCache]: Analyzing trace with hash -850116220, now seen corresponding path program 1 times [2020-10-27 19:48:31,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:31,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915656819] [2020-10-27 19:48:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:31,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:32,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:33,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:37,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:37,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:48:37,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:48:37,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5548 [2020-10-27 19:48:37,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:37,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:48:37,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:37,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:48:37,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:37,821 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-27 19:48:38,124 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-27 19:48:38,551 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 19:48:39,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:39,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:39,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:39,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915656819] [2020-10-27 19:48:39,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:39,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:48:39,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462307764] [2020-10-27 19:48:39,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:48:39,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:48:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:39,101 INFO L87 Difference]: Start difference. First operand 282 states and 398 transitions. Second operand 18 states. [2020-10-27 19:48:40,206 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 108 [2020-10-27 19:48:40,444 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 44 [2020-10-27 19:48:40,718 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 19:48:40,925 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 19:48:41,291 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 49 [2020-10-27 19:48:41,590 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-27 19:48:42,066 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 58 [2020-10-27 19:48:42,288 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-27 19:48:42,587 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-27 19:48:42,934 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-27 19:48:43,121 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-27 19:48:43,872 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 19:48:44,483 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 19:48:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:44,704 INFO L93 Difference]: Finished difference Result 536 states and 718 transitions. [2020-10-27 19:48:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 19:48:44,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-27 19:48:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:44,708 INFO L225 Difference]: With dead ends: 536 [2020-10-27 19:48:44,708 INFO L226 Difference]: Without dead ends: 517 [2020-10-27 19:48:44,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:48:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-27 19:48:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 233. [2020-10-27 19:48:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 19:48:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 329 transitions. [2020-10-27 19:48:44,768 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 329 transitions. Word has length 42 [2020-10-27 19:48:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:44,768 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 329 transitions. [2020-10-27 19:48:44,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:48:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 329 transitions. [2020-10-27 19:48:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:48:44,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:44,769 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:48:44,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:48:44,770 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:44,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1375921603, now seen corresponding path program 6 times [2020-10-27 19:48:44,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:44,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622867594] [2020-10-27 19:48:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:44,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:45,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:49,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:49,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:48:49,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:48:49,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 19:48:49,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:49,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:49,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:49,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:48:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:49,890 ERROR L253 erpolLogProxyWrapper]: Interpolant 33 not inductive [2020-10-27 19:48:49,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:48:49,891 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 19:48:49,896 INFO L168 Benchmark]: Toolchain (without parser) took 170542.45 ms. Allocated memory was 156.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 130.4 MB in the beginning and 742.1 MB in the end (delta: -611.7 MB). Peak memory consumption was 703.2 MB. Max. memory is 8.0 GB. [2020-10-27 19:48:49,896 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 125.8 MB. Free memory is still 101.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:48:49,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 569.83 ms. Allocated memory is still 156.2 MB. Free memory was 129.8 MB in the beginning and 107.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:48:49,897 INFO L168 Benchmark]: Boogie Preprocessor took 130.98 ms. Allocated memory is still 156.2 MB. Free memory was 107.3 MB in the beginning and 137.0 MB in the end (delta: -29.7 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. [2020-10-27 19:48:49,898 INFO L168 Benchmark]: RCFGBuilder took 886.85 ms. Allocated memory is still 156.2 MB. Free memory was 137.0 MB in the beginning and 134.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:48:49,898 INFO L168 Benchmark]: TraceAbstraction took 168940.28 ms. Allocated memory was 156.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 134.0 MB in the beginning and 742.1 MB in the end (delta: -608.1 MB). Peak memory consumption was 705.3 MB. Max. memory is 8.0 GB. [2020-10-27 19:48:49,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 125.8 MB. Free memory is still 101.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 569.83 ms. Allocated memory is still 156.2 MB. Free memory was 129.8 MB in the beginning and 107.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 130.98 ms. Allocated memory is still 156.2 MB. Free memory was 107.3 MB in the beginning and 137.0 MB in the end (delta: -29.7 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 886.85 ms. Allocated memory is still 156.2 MB. Free memory was 137.0 MB in the beginning and 134.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 168940.28 ms. Allocated memory was 156.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 134.0 MB in the beginning and 742.1 MB in the end (delta: -608.1 MB). Peak memory consumption was 705.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...