/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:41:01,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:41:01,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:41:01,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:41:01,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:41:01,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:41:01,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:41:01,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:41:01,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:41:01,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:41:01,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:41:01,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:41:01,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:41:01,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:41:01,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:41:01,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:41:01,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:41:01,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:41:01,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:41:01,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:41:01,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:41:01,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:41:01,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:41:01,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:41:01,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:41:01,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:41:01,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:41:01,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:41:01,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:41:01,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:41:01,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:41:01,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:41:01,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:41:01,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:41:01,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:41:01,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:41:01,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:41:01,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:41:01,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:41:01,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:41:01,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:41:01,630 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 00:41:01,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:41:01,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:41:01,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:41:01,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:41:01,689 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:41:01,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:41:01,690 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:41:01,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:41:01,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:41:01,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:41:01,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:41:01,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:41:01,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:41:01,692 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:41:01,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:41:01,693 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:41:01,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:41:01,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:41:01,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:41:01,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:41:01,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:41:01,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:41:01,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:41:01,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:41:01,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:41:01,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:41:01,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:41:01,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:41:01,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:41:01,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:41:02,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:41:02,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:41:02,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:41:02,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:41:02,165 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:41:02,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label14.c [2020-10-27 00:41:02,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9809caa3/7d5da3bf455b49ba98cec30685811dc0/FLAGd93643edf [2020-10-27 00:41:03,605 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:41:03,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label14.c [2020-10-27 00:41:03,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9809caa3/7d5da3bf455b49ba98cec30685811dc0/FLAGd93643edf [2020-10-27 00:41:03,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9809caa3/7d5da3bf455b49ba98cec30685811dc0 [2020-10-27 00:41:03,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:41:03,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:41:03,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:41:03,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:41:03,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:41:03,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:41:03" (1/1) ... [2020-10-27 00:41:03,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5d40e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:03, skipping insertion in model container [2020-10-27 00:41:03,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:41:03" (1/1) ... [2020-10-27 00:41:03,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:41:04,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:41:06,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:41:06,396 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:41:07,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:41:07,733 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:41:07,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07 WrapperNode [2020-10-27 00:41:07,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:41:07,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:41:07,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:41:07,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:41:07,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (1/1) ... [2020-10-27 00:41:07,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (1/1) ... [2020-10-27 00:41:07,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (1/1) ... [2020-10-27 00:41:07,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (1/1) ... [2020-10-27 00:41:08,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (1/1) ... [2020-10-27 00:41:08,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (1/1) ... [2020-10-27 00:41:08,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (1/1) ... [2020-10-27 00:41:08,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:41:08,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:41:08,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:41:08,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:41:08,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (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 00:41:08,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:41:08,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:41:08,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:41:08,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:41:08,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:41:08,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:41:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:41:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:41:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:41:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:41:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:41:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:41:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:41:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:41:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:41:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:41:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:41:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:41:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:41:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:41:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:41:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:41:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:41:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:41:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:41:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:41:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:41:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:41:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:41:22,556 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:41:22,556 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:41:22,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:41:22 BoogieIcfgContainer [2020-10-27 00:41:22,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:41:22,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:41:22,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:41:22,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:41:22,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:41:03" (1/3) ... [2020-10-27 00:41:22,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c91a9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:41:22, skipping insertion in model container [2020-10-27 00:41:22,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:41:07" (2/3) ... [2020-10-27 00:41:22,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c91a9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:41:22, skipping insertion in model container [2020-10-27 00:41:22,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:41:22" (3/3) ... [2020-10-27 00:41:22,573 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label14.c [2020-10-27 00:41:22,586 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:41:22,593 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:41:22,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:41:22,647 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:41:22,647 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:41:22,647 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:41:22,647 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:41:22,647 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:41:22,648 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:41:22,648 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:41:22,648 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:41:22,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:41:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 00:41:22,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:22,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:41:22,704 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash -851326682, now seen corresponding path program 1 times [2020-10-27 00:41:22,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:22,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754770497] [2020-10-27 00:41:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:22,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:23,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:23,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 00:41:23,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:23,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-27 00:41:23,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:23,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:41:23,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:23,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 00:41:23,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:41:23,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:23,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:23,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:23,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:23,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 00:41:23,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:23,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:23,647 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 00:41:23,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754770497] [2020-10-27 00:41:23,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:41:23,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:41:23,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661874050] [2020-10-27 00:41:23,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:41:23,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:23,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:41:23,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:41:23,677 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:41:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:49,480 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-27 00:41:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:41:49,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 00:41:49,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:49,539 INFO L225 Difference]: With dead ends: 5100 [2020-10-27 00:41:49,539 INFO L226 Difference]: Without dead ends: 3255 [2020-10-27 00:41:49,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:41:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-27 00:41:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-27 00:41:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-27 00:41:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-27 00:41:49,764 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 19 [2020-10-27 00:41:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:49,764 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-27 00:41:49,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:41:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-27 00:41:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 00:41:49,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:49,769 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:41:49,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:41:49,770 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:49,771 INFO L82 PathProgramCache]: Analyzing trace with hash -160286386, now seen corresponding path program 1 times [2020-10-27 00:41:49,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:49,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070824852] [2020-10-27 00:41:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:49,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:50,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:50,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:51,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:51,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 00:41:51,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:41:51,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-10-27 00:41:51,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:51,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:41:51,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:51,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 00:41:51,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:41:51,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:51,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:51,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:51,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:51,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:51,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 00:41:51,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:51,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:51,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:51,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:51,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:51,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:41:51,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:41:51,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 00:41:51,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:51,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:51,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:51,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:41:51,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:41:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070824852] [2020-10-27 00:41:51,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:41:51,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:41:51,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002760465] [2020-10-27 00:41:51,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:41:51,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:51,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:41:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:51,901 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-27 00:42:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:42:34,237 INFO L93 Difference]: Finished difference Result 12135 states and 19935 transitions. [2020-10-27 00:42:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 00:42:34,239 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-27 00:42:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:42:34,297 INFO L225 Difference]: With dead ends: 12135 [2020-10-27 00:42:34,297 INFO L226 Difference]: Without dead ends: 8932 [2020-10-27 00:42:34,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:42:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8932 states. [2020-10-27 00:42:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8932 to 8926. [2020-10-27 00:42:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8926 states. [2020-10-27 00:42:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8926 states to 8926 states and 13326 transitions. [2020-10-27 00:42:34,624 INFO L78 Accepts]: Start accepts. Automaton has 8926 states and 13326 transitions. Word has length 94 [2020-10-27 00:42:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:42:34,625 INFO L481 AbstractCegarLoop]: Abstraction has 8926 states and 13326 transitions. [2020-10-27 00:42:34,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:42:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 8926 states and 13326 transitions. [2020-10-27 00:42:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 00:42:34,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:42:34,637 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:34,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:42:34,637 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:42:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:42:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1606337680, now seen corresponding path program 1 times [2020-10-27 00:42:34,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:42:34,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915491066] [2020-10-27 00:42:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:42:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:35,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:35,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:35,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 00:42:35,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:42:35,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-10-27 00:42:35,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:35,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:42:35,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:42:35,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:42:35,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:36,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:42:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:36,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:36,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:42:36,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:36,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:42:36,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:36,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:42:36,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:42:36,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:42:36,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:36,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:42:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:36,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:36,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:36,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:42:36,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:36,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 00:42:36,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:42:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:42:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:42:36,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:42:36,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915491066] [2020-10-27 00:42:36,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:42:36,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:42:36,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233659079] [2020-10-27 00:42:36,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:42:36,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:42:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:42:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:42:36,622 INFO L87 Difference]: Start difference. First operand 8926 states and 13326 transitions. Second operand 7 states. [2020-10-27 00:43:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:43:19,636 INFO L93 Difference]: Finished difference Result 26970 states and 41586 transitions. [2020-10-27 00:43:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:43:19,638 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-10-27 00:43:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:43:19,754 INFO L225 Difference]: With dead ends: 26970 [2020-10-27 00:43:19,755 INFO L226 Difference]: Without dead ends: 18050 [2020-10-27 00:43:19,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:43:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18050 states. [2020-10-27 00:43:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18050 to 17844. [2020-10-27 00:43:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17844 states. [2020-10-27 00:43:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17844 states to 17844 states and 24215 transitions. [2020-10-27 00:43:20,322 INFO L78 Accepts]: Start accepts. Automaton has 17844 states and 24215 transitions. Word has length 120 [2020-10-27 00:43:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:43:20,325 INFO L481 AbstractCegarLoop]: Abstraction has 17844 states and 24215 transitions. [2020-10-27 00:43:20,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:43:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 17844 states and 24215 transitions. [2020-10-27 00:43:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 00:43:20,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:43:20,334 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:43:20,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:43:20,335 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:43:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:43:20,336 INFO L82 PathProgramCache]: Analyzing trace with hash 74476137, now seen corresponding path program 1 times [2020-10-27 00:43:20,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:43:20,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969878412] [2020-10-27 00:43:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:43:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:20,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:20,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:21,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:21,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 00:43:21,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:43:21,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1345 [2020-10-27 00:43:21,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:43:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:43:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 00:43:21,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:43:21,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:43:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:21,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:21,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:43:21,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:43:21,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:43:21,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:21,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:43:21,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:43:21,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:43:21,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:43:21,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:43:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:22,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:22,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:22,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 00:43:22,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:43:22,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-27 00:43:22,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:22,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:43:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:43:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 00:43:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:43:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:43:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969878412] [2020-10-27 00:43:22,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:43:22,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:43:22,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649634042] [2020-10-27 00:43:22,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:43:22,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:43:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:43:22,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:43:22,511 INFO L87 Difference]: Start difference. First operand 17844 states and 24215 transitions. Second operand 7 states. [2020-10-27 00:43:22,671 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:44:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:44:18,119 INFO L93 Difference]: Finished difference Result 52313 states and 73694 transitions. [2020-10-27 00:44:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:44:18,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 161 [2020-10-27 00:44:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:44:18,251 INFO L225 Difference]: With dead ends: 52313 [2020-10-27 00:44:18,252 INFO L226 Difference]: Without dead ends: 34475 [2020-10-27 00:44:18,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:44:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34475 states. [2020-10-27 00:44:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34475 to 34041. [2020-10-27 00:44:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34041 states. [2020-10-27 00:44:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34041 states to 34041 states and 43847 transitions. [2020-10-27 00:44:19,109 INFO L78 Accepts]: Start accepts. Automaton has 34041 states and 43847 transitions. Word has length 161 [2020-10-27 00:44:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:44:19,111 INFO L481 AbstractCegarLoop]: Abstraction has 34041 states and 43847 transitions. [2020-10-27 00:44:19,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:44:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 34041 states and 43847 transitions. [2020-10-27 00:44:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-27 00:44:19,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:44:19,119 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 00:44:19,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:44:19,119 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:44:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:44:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash 742627607, now seen corresponding path program 1 times [2020-10-27 00:44:19,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:44:19,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284212739] [2020-10-27 00:44:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:44:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:19,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:19,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:21,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:22,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:23,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:23,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 00:44:23,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:44:23,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4818 [2020-10-27 00:44:23,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:44:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:44:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-27 00:44:23,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:24,153 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:44:24,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:44:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:24,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:24,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:24,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:44:24,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:44:24,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:44:24,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:44:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:44:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:44:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:24,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:44:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:24,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:24,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:24,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 00:44:24,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:44:24,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 00:44:24,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:44:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:44:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 00:44:24,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:24,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-27 00:44:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:24,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:24,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:24,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:44:24,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:44:24,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 00:44:24,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:44:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-27 00:44:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:44:24,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:44:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284212739] [2020-10-27 00:44:24,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:44:24,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:44:24,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22473863] [2020-10-27 00:44:24,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:44:24,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:44:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:44:24,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:44:24,685 INFO L87 Difference]: Start difference. First operand 34041 states and 43847 transitions. Second operand 7 states. [2020-10-27 00:44:24,872 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68