/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/eca-rers2012/Problem13_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:54:59,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:54:59,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:54:59,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:54:59,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:54:59,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:54:59,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:54:59,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:54:59,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:54:59,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:54:59,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:54:59,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:54:59,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:54:59,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:54:59,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:54:59,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:54:59,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:54:59,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:54:59,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:54:59,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:54:59,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:54:59,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:54:59,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:54:59,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:54:59,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:54:59,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:54:59,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:54:59,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:54:59,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:54:59,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:54:59,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:54:59,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:54:59,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:54:59,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:54:59,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:54:59,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:54:59,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:54:59,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:54:59,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:54:59,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:54:59,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:54:59,619 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 17:54:59,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:54:59,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:54:59,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:54:59,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:54:59,684 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:54:59,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:54:59,684 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:54:59,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:54:59,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:54:59,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:54:59,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:54:59,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:54:59,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:54:59,687 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:54:59,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:54:59,687 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:54:59,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:54:59,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:54:59,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:54:59,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:54:59,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:54:59,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:54:59,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:54:59,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:54:59,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:54:59,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:54:59,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:54:59,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:54:59,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:54:59,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:55:00,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:55:00,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:55:00,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:55:00,158 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:55:00,159 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:55:00,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label08.c [2020-10-27 17:55:00,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee9c4d206/ce23d07813834214aa81064173794073/FLAG6c856d6f2 [2020-10-27 17:55:01,338 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:55:01,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label08.c [2020-10-27 17:55:01,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee9c4d206/ce23d07813834214aa81064173794073/FLAG6c856d6f2 [2020-10-27 17:55:01,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee9c4d206/ce23d07813834214aa81064173794073 [2020-10-27 17:55:01,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:55:01,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:55:01,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:55:01,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:55:01,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:55:01,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:55:01" (1/1) ... [2020-10-27 17:55:01,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71be6582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:01, skipping insertion in model container [2020-10-27 17:55:01,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:55:01" (1/1) ... [2020-10-27 17:55:01,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:55:02,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:55:03,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:55:03,644 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:55:04,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:55:04,497 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:55:04,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04 WrapperNode [2020-10-27 17:55:04,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:55:04,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:55:04,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:55:04,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:55:04,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (1/1) ... [2020-10-27 17:55:04,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (1/1) ... [2020-10-27 17:55:04,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (1/1) ... [2020-10-27 17:55:04,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (1/1) ... [2020-10-27 17:55:04,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (1/1) ... [2020-10-27 17:55:04,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (1/1) ... [2020-10-27 17:55:04,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (1/1) ... [2020-10-27 17:55:05,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:55:05,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:55:05,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:55:05,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:55:05,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (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 17:55:05,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:55:05,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:55:05,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:55:05,256 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:55:05,256 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 17:55:05,257 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 17:55:05,257 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 17:55:05,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:55:05,257 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:55:05,257 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 17:55:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 17:55:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 17:55:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:55:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:55:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:55:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:55:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:55:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:55:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:55:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:55:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:55:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:55:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:55:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:55:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:55:15,724 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:55:15,724 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:55:15,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:55:15 BoogieIcfgContainer [2020-10-27 17:55:15,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:55:15,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:55:15,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:55:15,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:55:15,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:55:01" (1/3) ... [2020-10-27 17:55:15,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701359f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:55:15, skipping insertion in model container [2020-10-27 17:55:15,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:04" (2/3) ... [2020-10-27 17:55:15,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701359f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:55:15, skipping insertion in model container [2020-10-27 17:55:15,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:55:15" (3/3) ... [2020-10-27 17:55:15,739 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label08.c [2020-10-27 17:55:15,752 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:55:15,758 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:55:15,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:55:15,809 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:55:15,809 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:55:15,809 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:55:15,809 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:55:15,809 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:55:15,810 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:55:15,810 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:55:15,810 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:55:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 17:55:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 17:55:15,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:15,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:55:15,862 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:15,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1642604858, now seen corresponding path program 1 times [2020-10-27 17:55:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:15,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496710760] [2020-10-27 17:55:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:16,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:16,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:16,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 17:55:16,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:16,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-27 17:55:16,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:55:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:55:16,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 17:55:16,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 23 [2020-10-27 17:55:16,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:16,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:16,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:16,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:16,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:16,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 17:55:16,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:55:16,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:17,013 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 17:55:17,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496710760] [2020-10-27 17:55:17,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:55:17,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 17:55:17,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811174139] [2020-10-27 17:55:17,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:55:17,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:17,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:55:17,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:55:17,054 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-27 17:55:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:55:33,539 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-27 17:55:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:55:33,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-27 17:55:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:55:33,583 INFO L225 Difference]: With dead ends: 3235 [2020-10-27 17:55:33,585 INFO L226 Difference]: Without dead ends: 2027 [2020-10-27 17:55:33,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:55:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-27 17:55:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-27 17:55:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-27 17:55:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-27 17:55:33,831 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 57 [2020-10-27 17:55:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:55:33,833 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-27 17:55:33,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:55:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-27 17:55:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 17:55:33,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:33,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:55:33,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:55:33,850 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:33,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1153454431, now seen corresponding path program 1 times [2020-10-27 17:55:33,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:33,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086508958] [2020-10-27 17:55:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:34,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:34,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:35,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:36,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:36,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 17:55:36,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:55:36,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2616 [2020-10-27 17:55:36,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 17:55:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 17:55:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 17:55:36,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:55:36,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:36,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:36,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:36,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:36,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:36,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 17:55:36,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:55:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:55:36,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-27 17:55:36,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:55:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:37,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:37,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:37,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 17:55:37,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:37,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 17:55:37,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 17:55:37,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:55:37,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086508958] [2020-10-27 17:55:37,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:55:37,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:55:37,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006923404] [2020-10-27 17:55:37,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:55:37,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:37,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:55:37,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:55:37,265 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 6 states. [2020-10-27 17:55:37,978 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 17:55:38,252 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-10-27 17:55:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:55:53,281 INFO L93 Difference]: Finished difference Result 4050 states and 6622 transitions. [2020-10-27 17:55:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 17:55:53,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2020-10-27 17:55:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:55:53,299 INFO L225 Difference]: With dead ends: 4050 [2020-10-27 17:55:53,299 INFO L226 Difference]: Without dead ends: 2014 [2020-10-27 17:55:53,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:55:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2020-10-27 17:55:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 2010. [2020-10-27 17:55:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-27 17:55:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3290 transitions. [2020-10-27 17:55:53,374 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3290 transitions. Word has length 132 [2020-10-27 17:55:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:55:53,377 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3290 transitions. [2020-10-27 17:55:53,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:55:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3290 transitions. [2020-10-27 17:55:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 17:55:53,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:53,390 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:55:53,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 17:55:53,391 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash -370902356, now seen corresponding path program 1 times [2020-10-27 17:55:53,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:53,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234753478] [2020-10-27 17:55:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:53,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:53,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:53,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:54,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:54,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:54,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 17:55:54,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:55:54,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-10-27 17:55:54,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:55:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 17:55:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 17:55:54,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:55,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:55,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:55,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:55,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:55,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:55:55,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:55,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:55:55,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:55,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:55:55,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:55,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:55:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:55,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:55,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:55,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:55,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 17:55:55,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:55:55,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 17:55:55,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 17:55:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:55:55,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:55:55,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234753478] [2020-10-27 17:55:55,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:55:55,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:55:55,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286385938] [2020-10-27 17:55:55,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:55:55,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:55,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:55:55,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:55:55,359 INFO L87 Difference]: Start difference. First operand 2010 states and 3290 transitions. Second operand 6 states. [2020-10-27 17:56:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:56:37,040 INFO L93 Difference]: Finished difference Result 9138 states and 15429 transitions. [2020-10-27 17:56:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 17:56:37,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2020-10-27 17:56:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:56:37,090 INFO L225 Difference]: With dead ends: 9138 [2020-10-27 17:56:37,090 INFO L226 Difference]: Without dead ends: 7134 [2020-10-27 17:56:37,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 17:56:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-10-27 17:56:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7054. [2020-10-27 17:56:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7054 states. [2020-10-27 17:56:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 10836 transitions. [2020-10-27 17:56:37,371 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 10836 transitions. Word has length 139 [2020-10-27 17:56:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:56:37,374 INFO L481 AbstractCegarLoop]: Abstraction has 7054 states and 10836 transitions. [2020-10-27 17:56:37,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:56:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 10836 transitions. [2020-10-27 17:56:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 17:56:37,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:56:37,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:56:37,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 17:56:37,386 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:56:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:56:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash -959708683, now seen corresponding path program 1 times [2020-10-27 17:56:37,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:56:37,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234754324] [2020-10-27 17:56:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:56:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:37,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:37,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:38,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:38,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 17:56:38,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:56:38,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-27 17:56:38,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:38,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:56:38,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 17:56:38,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 17:56:38,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:38,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:56:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:38,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:38,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:38,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:56:38,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:38,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:56:38,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:38,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:56:38,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:38,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:56:38,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:38,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:56:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:38,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:38,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 17:56:38,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 17:56:38,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:56:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 17:56:38,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:56:38,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234754324] [2020-10-27 17:56:38,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:56:38,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:56:38,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072160357] [2020-10-27 17:56:38,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:56:38,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:56:38,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:56:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:56:38,819 INFO L87 Difference]: Start difference. First operand 7054 states and 10836 transitions. Second operand 6 states. [2020-10-27 17:57:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:57:12,853 INFO L93 Difference]: Finished difference Result 27199 states and 43615 transitions. [2020-10-27 17:57:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 17:57:12,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2020-10-27 17:57:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:57:13,009 INFO L225 Difference]: With dead ends: 27199 [2020-10-27 17:57:13,010 INFO L226 Difference]: Without dead ends: 20151 [2020-10-27 17:57:13,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:57:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2020-10-27 17:57:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 20093. [2020-10-27 17:57:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20093 states. [2020-10-27 17:57:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20093 states to 20093 states and 29089 transitions. [2020-10-27 17:57:13,751 INFO L78 Accepts]: Start accepts. Automaton has 20093 states and 29089 transitions. Word has length 158 [2020-10-27 17:57:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:57:13,753 INFO L481 AbstractCegarLoop]: Abstraction has 20093 states and 29089 transitions. [2020-10-27 17:57:13,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:57:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20093 states and 29089 transitions. [2020-10-27 17:57:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 17:57:13,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:57:13,762 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:57:13,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 17:57:13,762 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:57:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:57:13,763 INFO L82 PathProgramCache]: Analyzing trace with hash 273464364, now seen corresponding path program 1 times [2020-10-27 17:57:13,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:57:13,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192192314] [2020-10-27 17:57:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:57:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:13,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:13,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:14,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:14,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:16,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:17,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:18,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:18,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-27 17:57:18,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 17:57:18,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 17:57:18,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:57:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-10-27 17:57:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 17:57:18,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:18,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:57:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:18,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:18,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:18,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:57:18,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:57:18,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:57:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:57:18,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:18,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:57:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:19,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:19,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:19,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 17:57:19,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:19,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 17:57:19,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:19,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:57:19,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:19,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:57:19,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 17:57:19,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-27 17:57:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:19,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:19,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:19,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 17:57:19,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:19,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 17:57:19,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:19,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:57:19,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 17:57:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 17:57:19,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192192314] [2020-10-27 17:57:19,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:57:19,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:57:19,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629569369] [2020-10-27 17:57:19,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:57:19,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:57:19,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:57:19,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:57:19,265 INFO L87 Difference]: Start difference. First operand 20093 states and 29089 transitions. Second operand 5 states. [2020-10-27 17:57:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:57:41,030 INFO L93 Difference]: Finished difference Result 59681 states and 89958 transitions. [2020-10-27 17:57:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:57:41,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 246 [2020-10-27 17:57:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:57:41,204 INFO L225 Difference]: With dead ends: 59681 [2020-10-27 17:57:41,205 INFO L226 Difference]: Without dead ends: 39594 [2020-10-27 17:57:41,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:57:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39594 states. [2020-10-27 17:57:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39594 to 39587. [2020-10-27 17:57:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39587 states. [2020-10-27 17:57:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39587 states to 39587 states and 55765 transitions. [2020-10-27 17:57:42,472 INFO L78 Accepts]: Start accepts. Automaton has 39587 states and 55765 transitions. Word has length 246 [2020-10-27 17:57:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:57:42,473 INFO L481 AbstractCegarLoop]: Abstraction has 39587 states and 55765 transitions. [2020-10-27 17:57:42,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:57:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39587 states and 55765 transitions. [2020-10-27 17:57:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-27 17:57:42,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:57:42,489 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:57:42,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 17:57:42,490 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:57:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:57:42,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1202925875, now seen corresponding path program 1 times [2020-10-27 17:57:42,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:57:42,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538648615] [2020-10-27 17:57:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:57:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:42,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:42,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:42,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:43,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:44,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:47,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:47,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-27 17:57:47,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 17:57:47,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 17:57:47,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:47,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:57:47,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-10-27 17:57:47,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 17:57:47,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:47,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:57:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:47,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:47,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:47,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:57:47,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:47,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:57:47,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:57:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:57:47,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:57:47,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:57:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:47,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:47,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:47,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 17:57:47,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:47,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 17:57:47,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:57:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:57:47,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:57:47,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-27 17:57:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:48,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:48,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:48,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 17:57:48,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:48,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 17:57:48,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:57:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 17:57:48,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-27 17:57:48,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538648615] [2020-10-27 17:57:48,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:57:48,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:57:48,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608855225] [2020-10-27 17:57:48,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:57:48,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:57:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:57:48,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:57:48,208 INFO L87 Difference]: Start difference. First operand 39587 states and 55765 transitions. Second operand 5 states. [2020-10-27 17:58:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:58:20,399 INFO L93 Difference]: Finished difference Result 96324 states and 139637 transitions. [2020-10-27 17:58:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:58:20,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2020-10-27 17:58:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:58:20,654 INFO L225 Difference]: With dead ends: 96324 [2020-10-27 17:58:20,655 INFO L226 Difference]: Without dead ends: 56743 [2020-10-27 17:58:20,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:58:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56743 states. [2020-10-27 17:58:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56743 to 56679. [2020-10-27 17:58:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56679 states. [2020-10-27 17:58:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56679 states to 56679 states and 79399 transitions. [2020-10-27 17:58:22,347 INFO L78 Accepts]: Start accepts. Automaton has 56679 states and 79399 transitions. Word has length 252 [2020-10-27 17:58:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:58:22,348 INFO L481 AbstractCegarLoop]: Abstraction has 56679 states and 79399 transitions. [2020-10-27 17:58:22,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:58:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 56679 states and 79399 transitions. [2020-10-27 17:58:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-27 17:58:22,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:58:22,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:58:22,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 17:58:22,365 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:58:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:58:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash 9684843, now seen corresponding path program 1 times [2020-10-27 17:58:22,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:58:22,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558633507] [2020-10-27 17:58:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:58:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:22,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:23,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:24,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:25,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:25,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-27 17:58:25,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:58:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3347 [2020-10-27 17:58:25,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:58:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 234 [2020-10-27 17:58:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 17:58:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:25,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:58:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:25,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:25,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:25,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:58:25,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:25,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:58:25,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:58:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:58:25,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:25,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:58:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:26,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:26,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:26,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 17:58:26,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:26,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 17:58:26,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:26,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:58:26,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:26,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:58:26,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:26,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-27 17:58:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:26,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:26,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:26,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 17:58:26,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:26,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 17:58:26,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:26,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:58:26,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:26,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 17:58:26,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-27 17:58:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558633507] [2020-10-27 17:58:26,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:58:26,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:58:26,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603893760] [2020-10-27 17:58:26,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:58:26,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:58:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:58:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:58:26,303 INFO L87 Difference]: Start difference. First operand 56679 states and 79399 transitions. Second operand 5 states.