/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/Problem13_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:03:44,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:03:44,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:03:44,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:03:44,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:03:44,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:03:44,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:03:44,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:03:44,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:03:44,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:03:44,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:03:44,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:03:44,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:03:44,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:03:44,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:03:44,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:03:44,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:03:44,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:03:44,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:03:44,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:03:44,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:03:44,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:03:44,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:03:44,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:03:44,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:03:44,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:03:44,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:03:44,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:03:44,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:03:44,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:03:44,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:03:44,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:03:44,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:03:44,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:03:44,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:03:44,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:03:44,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:03:44,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:03:44,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:03:44,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:03:44,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:03:44,773 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 [2020-10-26 23:03:44,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:03:44,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:03:44,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:03:44,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:03:44,832 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:03:44,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:03:44,834 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:03:44,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:03:44,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:03:44,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:03:44,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:03:44,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:03:44,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:03:44,836 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:03:44,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:03:44,836 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:03:44,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:03:44,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:03:44,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:03:44,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:03:44,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:03:44,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:03:44,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:03:44,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:03:44,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:03:44,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:03:44,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:03:44,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:03:44,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:03:44,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:03:45,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:03:45,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:03:45,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:03:45,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:03:45,332 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:03:45,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label05.c [2020-10-26 23:03:45,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd1cfcf47/f78d721792c2439f979540307e646e3c/FLAGfa1d5047a [2020-10-26 23:03:46,492 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:03:46,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label05.c [2020-10-26 23:03:46,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd1cfcf47/f78d721792c2439f979540307e646e3c/FLAGfa1d5047a [2020-10-26 23:03:46,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd1cfcf47/f78d721792c2439f979540307e646e3c [2020-10-26 23:03:46,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:03:46,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:03:46,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:03:46,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:03:46,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:03:46,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:03:46" (1/1) ... [2020-10-26 23:03:46,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d49793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:46, skipping insertion in model container [2020-10-26 23:03:46,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:03:46" (1/1) ... [2020-10-26 23:03:46,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:03:47,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:03:48,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:03:48,764 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:03:49,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:03:49,646 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:03:49,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49 WrapperNode [2020-10-26 23:03:49,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:03:49,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:03:49,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:03:49,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:03:49,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (1/1) ... [2020-10-26 23:03:49,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (1/1) ... [2020-10-26 23:03:49,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (1/1) ... [2020-10-26 23:03:49,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (1/1) ... [2020-10-26 23:03:49,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (1/1) ... [2020-10-26 23:03:49,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (1/1) ... [2020-10-26 23:03:50,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (1/1) ... [2020-10-26 23:03:50,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:03:50,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:03:50,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:03:50,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:03:50,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (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 [2020-10-26 23:03:50,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:03:50,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:03:50,240 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:03:50,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:03:50,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:03:50,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:03:50,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:03:50,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:03:50,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:03:50,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:03:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:03:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:03:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:03:50,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:03:50,244 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:03:50,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:03:50,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:03:50,245 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:03:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:03:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:03:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:03:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:03:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:03:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:03:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:03:59,845 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:03:59,845 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:03:59,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:03:59 BoogieIcfgContainer [2020-10-26 23:03:59,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:03:59,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:03:59,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:03:59,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:03:59,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:03:46" (1/3) ... [2020-10-26 23:03:59,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a61d848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:03:59, skipping insertion in model container [2020-10-26 23:03:59,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:49" (2/3) ... [2020-10-26 23:03:59,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a61d848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:03:59, skipping insertion in model container [2020-10-26 23:03:59,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:03:59" (3/3) ... [2020-10-26 23:03:59,862 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label05.c [2020-10-26 23:03:59,874 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:03:59,880 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:03:59,894 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:03:59,938 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:03:59,938 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:03:59,938 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:03:59,938 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:03:59,938 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:03:59,938 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:03:59,939 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:03:59,939 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:03:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:03:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 23:03:59,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:59,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:03:59,995 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:00,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1017743642, now seen corresponding path program 1 times [2020-10-26 23:04:00,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:00,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362378320] [2020-10-26 23:04:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:00,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:00,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:00,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 23:04:00,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:00,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-26 23:04:00,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:00,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:00,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:00,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 23:04:00,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:04:01,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:01,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:01,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:01,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:01,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 23:04:01,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:01,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:01,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:01,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362378320] [2020-10-26 23:04:01,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:01,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 23:04:01,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668460300] [2020-10-26 23:04:01,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:04:01,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:01,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:04:01,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:04:01,216 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-26 23:04:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:25,435 INFO L93 Difference]: Finished difference Result 4083 states and 7566 transitions. [2020-10-26 23:04:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:04:25,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-10-26 23:04:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:25,476 INFO L225 Difference]: With dead ends: 4083 [2020-10-26 23:04:25,476 INFO L226 Difference]: Without dead ends: 2871 [2020-10-26 23:04:25,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2020-10-26 23:04:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 1934. [2020-10-26 23:04:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1934 states. [2020-10-26 23:04:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3163 transitions. [2020-10-26 23:04:25,677 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3163 transitions. Word has length 49 [2020-10-26 23:04:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:25,678 INFO L481 AbstractCegarLoop]: Abstraction has 1934 states and 3163 transitions. [2020-10-26 23:04:25,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:04:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3163 transitions. [2020-10-26 23:04:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 23:04:25,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:25,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:04:25,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:04:25,685 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:25,686 INFO L82 PathProgramCache]: Analyzing trace with hash -6498815, now seen corresponding path program 1 times [2020-10-26 23:04:25,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:25,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683085767] [2020-10-26 23:04:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:25,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:25,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:27,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:27,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 23:04:27,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:04:27,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2220 [2020-10-26 23:04:27,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:27,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:04:27,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:04:28,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:28,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:28,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:28,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:28,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:28,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:04:28,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:28,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 23:04:28,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:28,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:28,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:28,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:04:28,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:28,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 23:04:28,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:28,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:28,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:28,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:04:28,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683085767] [2020-10-26 23:04:28,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:28,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:04:28,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978858777] [2020-10-26 23:04:28,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:28,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:28,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:28,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:28,478 INFO L87 Difference]: Start difference. First operand 1934 states and 3163 transitions. Second operand 7 states. [2020-10-26 23:04:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:50,687 INFO L93 Difference]: Finished difference Result 5614 states and 9266 transitions. [2020-10-26 23:04:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:04:50,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-26 23:04:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:50,718 INFO L225 Difference]: With dead ends: 5614 [2020-10-26 23:04:50,719 INFO L226 Difference]: Without dead ends: 3686 [2020-10-26 23:04:50,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:04:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2020-10-26 23:04:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 3616. [2020-10-26 23:04:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3616 states. [2020-10-26 23:04:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 5140 transitions. [2020-10-26 23:04:50,866 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 5140 transitions. Word has length 124 [2020-10-26 23:04:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:50,868 INFO L481 AbstractCegarLoop]: Abstraction has 3616 states and 5140 transitions. [2020-10-26 23:04:50,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:04:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 5140 transitions. [2020-10-26 23:04:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 23:04:50,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:50,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:04:50,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:04:50,880 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash 233255581, now seen corresponding path program 1 times [2020-10-26 23:04:50,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:50,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879077545] [2020-10-26 23:04:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:50,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:51,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:51,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:51,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-26 23:04:51,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:04:51,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-26 23:04:51,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:04:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:52,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:52,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:52,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:52,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:52,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:52,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:04:52,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:52,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:52,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:52,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:52,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:52,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:04:52,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:52,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-26 23:04:52,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:52,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:52,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:52,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:04:52,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:52,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879077545] [2020-10-26 23:04:52,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:52,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:04:52,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056828330] [2020-10-26 23:04:52,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:52,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:52,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:52,513 INFO L87 Difference]: Start difference. First operand 3616 states and 5140 transitions. Second operand 7 states. [2020-10-26 23:05:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:11,455 INFO L93 Difference]: Finished difference Result 10723 states and 15477 transitions. [2020-10-26 23:05:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:05:11,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-10-26 23:05:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:11,498 INFO L225 Difference]: With dead ends: 10723 [2020-10-26 23:05:11,498 INFO L226 Difference]: Without dead ends: 7113 [2020-10-26 23:05:11,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:05:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2020-10-26 23:05:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 6991. [2020-10-26 23:05:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6991 states. [2020-10-26 23:05:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 9002 transitions. [2020-10-26 23:05:11,724 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 9002 transitions. Word has length 154 [2020-10-26 23:05:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:11,726 INFO L481 AbstractCegarLoop]: Abstraction has 6991 states and 9002 transitions. [2020-10-26 23:05:11,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:05:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 9002 transitions. [2020-10-26 23:05:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-26 23:05:11,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:11,732 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, 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] [2020-10-26 23:05:11,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:05:11,737 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 201575094, now seen corresponding path program 1 times [2020-10-26 23:05:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:11,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487988947] [2020-10-26 23:05:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:11,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:12,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:12,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:16,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:16,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 23:05:16,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:05:16,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 23:05:16,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:05:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:05:16,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:17,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:17,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:17,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:17,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:17,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:17,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:05:17,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:17,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:17,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:17,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:17,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:17,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:17,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:05:17,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:17,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 23:05:17,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:05:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:17,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:05:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:17,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:17,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:05:17,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:17,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 23:05:17,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:05:17,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:05:17,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:05:17,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 23:05:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:05:17,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487988947] [2020-10-26 23:05:17,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:05:17,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:05:17,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116909491] [2020-10-26 23:05:17,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:05:17,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:05:17,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:05:17,839 INFO L87 Difference]: Start difference. First operand 6991 states and 9002 transitions. Second operand 7 states. [2020-10-26 23:05:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:37,998 INFO L93 Difference]: Finished difference Result 13326 states and 17431 transitions. [2020-10-26 23:05:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:05:38,007 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 249 [2020-10-26 23:05:38,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:38,041 INFO L225 Difference]: With dead ends: 13326 [2020-10-26 23:05:38,041 INFO L226 Difference]: Without dead ends: 7144 [2020-10-26 23:05:38,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:05:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2020-10-26 23:05:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 7032. [2020-10-26 23:05:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7032 states. [2020-10-26 23:05:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 9075 transitions. [2020-10-26 23:05:38,247 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 9075 transitions. Word has length 249 [2020-10-26 23:05:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:38,248 INFO L481 AbstractCegarLoop]: Abstraction has 7032 states and 9075 transitions. [2020-10-26 23:05:38,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:05:38,249 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 9075 transitions. [2020-10-26 23:05:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-26 23:05:38,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:38,254 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, 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, 1, 1] [2020-10-26 23:05:38,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:05:38,254 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -178960166, now seen corresponding path program 1 times [2020-10-26 23:05:38,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:38,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107069528] [2020-10-26 23:05:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:38,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:38,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:41,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:41,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-26 23:05:41,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:05:41,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3237 [2020-10-26 23:05:41,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:41,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:05:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-26 23:05:41,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:41,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:41,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:41,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:41,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:41,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:41,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:05:41,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:41,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:41,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:41,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:41,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:42,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:42,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:05:42,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:05:42,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-26 23:05:42,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:42,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:05:42,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:42,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:05:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:42,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:42,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:05:42,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:42,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-26 23:05:42,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:05:42,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-26 23:05:42,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107069528] [2020-10-26 23:05:42,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:05:42,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:05:42,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579388598] [2020-10-26 23:05:42,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:05:42,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:42,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:05:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:05:42,801 INFO L87 Difference]: Start difference. First operand 7032 states and 9075 transitions. Second operand 7 states. [2020-10-26 23:06:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:06:08,463 INFO L93 Difference]: Finished difference Result 18587 states and 25312 transitions. [2020-10-26 23:06:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:06:08,467 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2020-10-26 23:06:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:06:08,520 INFO L225 Difference]: With dead ends: 18587 [2020-10-26 23:06:08,520 INFO L226 Difference]: Without dead ends: 12364 [2020-10-26 23:06:08,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:06:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12364 states. [2020-10-26 23:06:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12364 to 11434. [2020-10-26 23:06:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11434 states. [2020-10-26 23:06:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11434 states to 11434 states and 14553 transitions. [2020-10-26 23:06:08,863 INFO L78 Accepts]: Start accepts. Automaton has 11434 states and 14553 transitions. Word has length 254 [2020-10-26 23:06:08,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:06:08,864 INFO L481 AbstractCegarLoop]: Abstraction has 11434 states and 14553 transitions. [2020-10-26 23:06:08,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:06:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 11434 states and 14553 transitions. [2020-10-26 23:06:08,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-26 23:06:08,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:06:08,872 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, 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] [2020-10-26 23:06:08,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:06:08,872 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:06:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:06:08,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2063716483, now seen corresponding path program 1 times [2020-10-26 23:06:08,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:06:08,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258818992] [2020-10-26 23:06:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:06:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:08,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:09,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:10,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:10,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-26 23:06:10,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:06:10,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1492 [2020-10-26 23:06:10,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:06:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:06:10,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:10,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:06:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:10,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:10,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:10,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:06:10,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:10,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:06:10,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:06:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:06:10,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:10,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:06:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:10,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:10,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:10,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:06:10,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:10,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 23:06:10,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:06:10,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:10,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:06:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:10,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:11,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:11,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:06:11,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:11,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-26 23:06:11,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:11,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:11,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:06:11,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:06:11,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:06:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:06:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258818992] [2020-10-26 23:06:11,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:06:11,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:06:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357314032] [2020-10-26 23:06:11,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:06:11,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:06:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:06:11,203 INFO L87 Difference]: Start difference. First operand 11434 states and 14553 transitions. Second operand 7 states. [2020-10-26 23:06:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:06:37,094 INFO L93 Difference]: Finished difference Result 28460 states and 38419 transitions. [2020-10-26 23:06:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:06:37,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2020-10-26 23:06:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:06:37,168 INFO L225 Difference]: With dead ends: 28460 [2020-10-26 23:06:37,168 INFO L226 Difference]: Without dead ends: 17835 [2020-10-26 23:06:37,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:06:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17835 states. [2020-10-26 23:06:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17835 to 17647. [2020-10-26 23:06:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17647 states. [2020-10-26 23:06:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17647 states to 17647 states and 22291 transitions. [2020-10-26 23:06:37,790 INFO L78 Accepts]: Start accepts. Automaton has 17647 states and 22291 transitions. Word has length 256 [2020-10-26 23:06:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:06:37,792 INFO L481 AbstractCegarLoop]: Abstraction has 17647 states and 22291 transitions. [2020-10-26 23:06:37,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:06:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 17647 states and 22291 transitions. [2020-10-26 23:06:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-10-26 23:06:37,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:06:37,797 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, 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] [2020-10-26 23:06:37,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:06:37,797 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:06:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:06:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash -948901381, now seen corresponding path program 1 times [2020-10-26 23:06:37,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:06:37,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559594612] [2020-10-26 23:06:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:06:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:37,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:38,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:38,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:38,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:39,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:39,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 23:06:39,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:06:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1870 [2020-10-26 23:06:39,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:06:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-26 23:06:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:39,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:06:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:39,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:39,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:39,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:06:39,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:39,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:06:39,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:06:39,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:39,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:06:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:39,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:40,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:40,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:40,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:06:40,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:06:40,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 23:06:40,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:40,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:40,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:40,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:06:40,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:40,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:06:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:40,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:40,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:40,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:06:40,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:06:40,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-26 23:06:40,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:40,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:40,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-26 23:06:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:06:40,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 23:06:40,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559594612] [2020-10-26 23:06:40,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:06:40,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 23:06:40,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434809885] [2020-10-26 23:06:40,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:06:40,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:40,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:06:40,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:06:40,414 INFO L87 Difference]: Start difference. First operand 17647 states and 22291 transitions. Second operand 5 states. [2020-10-26 23:06:59,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:06:59,722 INFO L93 Difference]: Finished difference Result 28752 states and 37207 transitions. [2020-10-26 23:06:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:06:59,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 268 [2020-10-26 23:06:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:06:59,787 INFO L225 Difference]: With dead ends: 28752 [2020-10-26 23:06:59,787 INFO L226 Difference]: Without dead ends: 17652 [2020-10-26 23:06:59,816 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 [2020-10-26 23:06:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17652 states. [2020-10-26 23:07:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17652 to 17630. [2020-10-26 23:07:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17630 states. [2020-10-26 23:07:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17630 states to 17630 states and 22259 transitions. [2020-10-26 23:07:00,202 INFO L78 Accepts]: Start accepts. Automaton has 17630 states and 22259 transitions. Word has length 268 [2020-10-26 23:07:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:07:00,203 INFO L481 AbstractCegarLoop]: Abstraction has 17630 states and 22259 transitions. [2020-10-26 23:07:00,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:07:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 17630 states and 22259 transitions. [2020-10-26 23:07:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-26 23:07:00,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:00,214 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, 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] [2020-10-26 23:07:00,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:07:00,214 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1588132497, now seen corresponding path program 1 times [2020-10-26 23:07:00,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:00,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658285517] [2020-10-26 23:07:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:00,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:01,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:02,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:02,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:07:02,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:07:02,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2063 [2020-10-26 23:07:02,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:02,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:02,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:07:02,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 23:07:02,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:02,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:02,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:02,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:02,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:02,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:02,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:07:02,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:07:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:07:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:02,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:07:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:02,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:02,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:07:02,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:02,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 23:07:02,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:02,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:02,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:02,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:07:02,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:02,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:07:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:02,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:03,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:03,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:07:03,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:07:03,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-26 23:07:03,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:03,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:03,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:07:03,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:07:03,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:07:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 174 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:07:03,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658285517] [2020-10-26 23:07:03,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:07:03,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:07:03,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083252164] [2020-10-26 23:07:03,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:07:03,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:03,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:07:03,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:07:03,474 INFO L87 Difference]: Start difference. First operand 17630 states and 22259 transitions. Second operand 7 states. [2020-10-26 23:07:04,634 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-26 23:07:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:07:29,374 INFO L93 Difference]: Finished difference Result 29250 states and 38070 transitions. [2020-10-26 23:07:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:07:29,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 273 [2020-10-26 23:07:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:07:29,441 INFO L225 Difference]: With dead ends: 29250 [2020-10-26 23:07:29,442 INFO L226 Difference]: Without dead ends: 18113 [2020-10-26 23:07:29,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:07:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18113 states. [2020-10-26 23:07:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18113 to 17789. [2020-10-26 23:07:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17789 states. [2020-10-26 23:07:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17789 states to 17789 states and 22534 transitions. [2020-10-26 23:07:29,916 INFO L78 Accepts]: Start accepts. Automaton has 17789 states and 22534 transitions. Word has length 273 [2020-10-26 23:07:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:07:29,917 INFO L481 AbstractCegarLoop]: Abstraction has 17789 states and 22534 transitions. [2020-10-26 23:07:29,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:07:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 17789 states and 22534 transitions. [2020-10-26 23:07:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-26 23:07:29,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:29,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:07:29,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:07:29,928 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:29,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1720118778, now seen corresponding path program 1 times [2020-10-26 23:07:29,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:29,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476911957] [2020-10-26 23:07:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:30,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking...