/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:02:59,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:02:59,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:02:59,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:02:59,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:02:59,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:02:59,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:02:59,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:02:59,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:02:59,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:02:59,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:02:59,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:02:59,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:02:59,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:02:59,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:02:59,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:02:59,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:02:59,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:02:59,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:02:59,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:02:59,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:02:59,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:02:59,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:02:59,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:02:59,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:02:59,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:02:59,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:02:59,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:02:59,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:02:59,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:02:59,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:02:59,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:02:59,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:02:59,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:02:59,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:02:59,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:02:59,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:02:59,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:02:59,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:02:59,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:02:59,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:02:59,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:02:59,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:02:59,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:02:59,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:02:59,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:02:59,876 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:02:59,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:02:59,877 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:02:59,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:02:59,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:02:59,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:02:59,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:02:59,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:02:59,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:02:59,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:02:59,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:02:59,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:02:59,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:02:59,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:02:59,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:02:59,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:02:59,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:02:59,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:02:59,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:02:59,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:02:59,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:02:59,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:02:59,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:02:59,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:02:59,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:02:59,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:03:00,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:03:00,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:03:00,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:03:00,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:03:00,451 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:03:00,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label38.c [2020-10-27 18:03:00,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bae5fd6ee/9d971edb9cb74ebe9ca6e42c1504925f/FLAG9b00631d4 [2020-10-27 18:03:02,048 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:03:02,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label38.c [2020-10-27 18:03:02,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bae5fd6ee/9d971edb9cb74ebe9ca6e42c1504925f/FLAG9b00631d4 [2020-10-27 18:03:02,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bae5fd6ee/9d971edb9cb74ebe9ca6e42c1504925f [2020-10-27 18:03:02,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:03:02,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:03:02,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:03:02,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:03:02,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:03:02,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:03:02" (1/1) ... [2020-10-27 18:03:02,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b36651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:02, skipping insertion in model container [2020-10-27 18:03:02,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:03:02" (1/1) ... [2020-10-27 18:03:02,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:03:02,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:03:03,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:03:03,970 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:03:04,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:03:04,829 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:03:04,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04 WrapperNode [2020-10-27 18:03:04,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:03:04,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:03:04,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:03:04,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:03:04,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (1/1) ... [2020-10-27 18:03:04,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (1/1) ... [2020-10-27 18:03:04,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (1/1) ... [2020-10-27 18:03:04,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (1/1) ... [2020-10-27 18:03:05,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (1/1) ... [2020-10-27 18:03:05,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (1/1) ... [2020-10-27 18:03:05,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (1/1) ... [2020-10-27 18:03:05,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:03:05,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:03:05,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:03:05,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:03:05,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:03:05,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:03:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:03:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:03:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:03:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:03:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 18:03:05,433 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 18:03:05,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:03:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:03:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:03:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 18:03:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 18:03:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:03:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:03:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:03:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:03:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:03:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:03:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:03:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:03:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:03:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:03:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:03:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:03:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:03:15,940 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:03:15,941 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:03:15,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:03:15 BoogieIcfgContainer [2020-10-27 18:03:15,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:03:15,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:03:15,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:03:15,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:03:15,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:03:02" (1/3) ... [2020-10-27 18:03:15,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ab5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:03:15, skipping insertion in model container [2020-10-27 18:03:15,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:03:04" (2/3) ... [2020-10-27 18:03:15,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ab5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:03:15, skipping insertion in model container [2020-10-27 18:03:15,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:03:15" (3/3) ... [2020-10-27 18:03:15,962 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label38.c [2020-10-27 18:03:15,977 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:03:15,985 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:03:16,000 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:03:16,050 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:03:16,050 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:03:16,050 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:03:16,050 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:03:16,050 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:03:16,051 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:03:16,051 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:03:16,051 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:03:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 18:03:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 18:03:16,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:16,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:03:16,124 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash 717929002, now seen corresponding path program 1 times [2020-10-27 18:03:16,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204768698] [2020-10-27 18:03:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:16,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:17,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:17,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:03:17,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:17,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-27 18:03:17,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:03:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:03:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 18:03:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:03:17,322 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:03:17,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:17,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:17,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:17,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:17,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 18:03:17,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:03:17,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:03:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:03:17,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204768698] [2020-10-27 18:03:17,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:03:17,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:03:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872344973] [2020-10-27 18:03:17,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:03:17,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:17,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:03:17,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:03:17,469 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 18:03:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:03:36,675 INFO L93 Difference]: Finished difference Result 3209 states and 5919 transitions. [2020-10-27 18:03:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:03:36,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 18:03:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:03:36,737 INFO L225 Difference]: With dead ends: 3209 [2020-10-27 18:03:36,738 INFO L226 Difference]: Without dead ends: 2007 [2020-10-27 18:03:36,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2020-10-27 18:03:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1921. [2020-10-27 18:03:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1921 states. [2020-10-27 18:03:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 3312 transitions. [2020-10-27 18:03:36,956 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 3312 transitions. Word has length 66 [2020-10-27 18:03:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:03:36,959 INFO L481 AbstractCegarLoop]: Abstraction has 1921 states and 3312 transitions. [2020-10-27 18:03:36,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:03:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 3312 transitions. [2020-10-27 18:03:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 18:03:36,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:36,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:03:36,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:03:36,974 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:36,976 INFO L82 PathProgramCache]: Analyzing trace with hash -483513970, now seen corresponding path program 1 times [2020-10-27 18:03:36,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:36,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966992455] [2020-10-27 18:03:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:37,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:37,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:38,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:39,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:39,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 18:03:39,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:03:39,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2369 [2020-10-27 18:03:39,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:03:39,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:03:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 18:03:39,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 18:03:39,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:39,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:39,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:39,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:39,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:39,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 18:03:39,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:39,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 18:03:39,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:03:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:39,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:39,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:03:39,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:39,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 18:03:39,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:39,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:03:39,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:03:39,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966992455] [2020-10-27 18:03:39,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:03:39,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:03:39,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934839077] [2020-10-27 18:03:39,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:03:39,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:39,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:03:39,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:39,950 INFO L87 Difference]: Start difference. First operand 1921 states and 3312 transitions. Second operand 5 states. [2020-10-27 18:03:40,534 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:03:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:03:54,167 INFO L93 Difference]: Finished difference Result 3868 states and 6662 transitions. [2020-10-27 18:03:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:03:54,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-10-27 18:03:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:03:54,188 INFO L225 Difference]: With dead ends: 3868 [2020-10-27 18:03:54,188 INFO L226 Difference]: Without dead ends: 1936 [2020-10-27 18:03:54,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:03:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-27 18:03:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1921. [2020-10-27 18:03:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1921 states. [2020-10-27 18:03:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 3310 transitions. [2020-10-27 18:03:54,262 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 3310 transitions. Word has length 135 [2020-10-27 18:03:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:03:54,262 INFO L481 AbstractCegarLoop]: Abstraction has 1921 states and 3310 transitions. [2020-10-27 18:03:54,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:03:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 3310 transitions. [2020-10-27 18:03:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 18:03:54,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:54,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:03:54,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:03:54,266 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash 520999128, now seen corresponding path program 1 times [2020-10-27 18:03:54,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:54,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74983443] [2020-10-27 18:03:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:54,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:55,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:55,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 18:03:55,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:03:55,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-10-27 18:03:55,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:55,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:03:55,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 18:03:55,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:03:55,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:55,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:55,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:55,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:55,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:55,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:55,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:03:55,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:55,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:55,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:55,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:55,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:55,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:03:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:55,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:55,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:55,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:03:55,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:55,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 18:03:55,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 18:03:55,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:03:55,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74983443] [2020-10-27 18:03:55,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:03:55,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:03:55,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006236731] [2020-10-27 18:03:55,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:03:55,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:55,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:03:55,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:55,900 INFO L87 Difference]: Start difference. First operand 1921 states and 3310 transitions. Second operand 5 states. [2020-10-27 18:04:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:17,494 INFO L93 Difference]: Finished difference Result 5547 states and 9668 transitions. [2020-10-27 18:04:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:17,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2020-10-27 18:04:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:17,521 INFO L225 Difference]: With dead ends: 5547 [2020-10-27 18:04:17,521 INFO L226 Difference]: Without dead ends: 3632 [2020-10-27 18:04:17,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:04:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2020-10-27 18:04:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3606. [2020-10-27 18:04:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3606 states. [2020-10-27 18:04:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5862 transitions. [2020-10-27 18:04:17,663 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5862 transitions. Word has length 136 [2020-10-27 18:04:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:17,663 INFO L481 AbstractCegarLoop]: Abstraction has 3606 states and 5862 transitions. [2020-10-27 18:04:17,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:04:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5862 transitions. [2020-10-27 18:04:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 18:04:17,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:17,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:04:17,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:04:17,667 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:17,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1182259269, now seen corresponding path program 1 times [2020-10-27 18:04:17,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:17,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545715595] [2020-10-27 18:04:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:17,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:18,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:18,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 18:04:18,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:04:18,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-27 18:04:18,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:18,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:04:18,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-27 18:04:18,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:04:18,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:19,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:04:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:19,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:19,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:19,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:04:19,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:19,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 18:04:19,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:19,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:19,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:19,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:19,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:19,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:04:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:19,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:19,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:19,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:04:19,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:19,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 18:04:19,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:19,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:04:19,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:19,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 18:04:19,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:04:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:04:19,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545715595] [2020-10-27 18:04:19,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:04:19,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:04:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439500182] [2020-10-27 18:04:19,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:04:19,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:04:19,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:04:19,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:04:19,333 INFO L87 Difference]: Start difference. First operand 3606 states and 5862 transitions. Second operand 6 states. [2020-10-27 18:04:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:41,656 INFO L93 Difference]: Finished difference Result 10492 states and 17407 transitions. [2020-10-27 18:04:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:41,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2020-10-27 18:04:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:41,708 INFO L225 Difference]: With dead ends: 10492 [2020-10-27 18:04:41,708 INFO L226 Difference]: Without dead ends: 6892 [2020-10-27 18:04:41,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:04:41,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6892 states. [2020-10-27 18:04:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6892 to 6872. [2020-10-27 18:04:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6872 states. [2020-10-27 18:04:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6872 states to 6872 states and 10704 transitions. [2020-10-27 18:04:42,009 INFO L78 Accepts]: Start accepts. Automaton has 6872 states and 10704 transitions. Word has length 156 [2020-10-27 18:04:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:42,011 INFO L481 AbstractCegarLoop]: Abstraction has 6872 states and 10704 transitions. [2020-10-27 18:04:42,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:04:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6872 states and 10704 transitions. [2020-10-27 18:04:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 18:04:42,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:42,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:04:42,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:04:42,021 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1692803166, now seen corresponding path program 1 times [2020-10-27 18:04:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:42,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114439428] [2020-10-27 18:04:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:43,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:43,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 18:04:43,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:04:43,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-27 18:04:43,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:04:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-27 18:04:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:04:43,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:43,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:04:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:43,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:43,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:43,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:04:43,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:43,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:04:43,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:43,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:43,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:43,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:43,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:43,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:04:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:43,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:43,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:43,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 18:04:43,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:43,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 18:04:43,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:04:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:43,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 18:04:43,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:04:43,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114439428] [2020-10-27 18:04:43,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:04:43,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:04:43,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731843504] [2020-10-27 18:04:43,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:04:43,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:04:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:04:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:04:43,851 INFO L87 Difference]: Start difference. First operand 6872 states and 10704 transitions. Second operand 5 states. [2020-10-27 18:05:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:05:09,854 INFO L93 Difference]: Finished difference Result 20274 states and 32560 transitions. [2020-10-27 18:05:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:05:09,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-10-27 18:05:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:05:09,948 INFO L225 Difference]: With dead ends: 20274 [2020-10-27 18:05:09,948 INFO L226 Difference]: Without dead ends: 13408 [2020-10-27 18:05:09,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:05:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13408 states. [2020-10-27 18:05:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13408 to 13383. [2020-10-27 18:05:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13383 states. [2020-10-27 18:05:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13383 states to 13383 states and 19713 transitions. [2020-10-27 18:05:10,486 INFO L78 Accepts]: Start accepts. Automaton has 13383 states and 19713 transitions. Word has length 173 [2020-10-27 18:05:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:05:10,486 INFO L481 AbstractCegarLoop]: Abstraction has 13383 states and 19713 transitions. [2020-10-27 18:05:10,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:05:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 13383 states and 19713 transitions. [2020-10-27 18:05:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 18:05:10,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:10,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:05:10,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:05:10,493 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:10,494 INFO L82 PathProgramCache]: Analyzing trace with hash 641193813, now seen corresponding path program 1 times [2020-10-27 18:05:10,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:10,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163447026] [2020-10-27 18:05:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:10,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:10,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:11,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:12,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:13,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:13,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-27 18:05:13,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:05:13,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2614 [2020-10-27 18:05:13,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:13,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:05:13,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-27 18:05:13,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 18:05:13,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:13,332 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:05:13,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:05:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:13,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:13,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:13,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:05:13,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:13,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:05:13,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:05:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:05:13,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:13,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:05:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:13,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:13,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:13,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 18:05:13,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:13,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 18:05:13,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:05:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 18:05:13,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:05:13,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163447026] [2020-10-27 18:05:13,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:05:13,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:05:13,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005617518] [2020-10-27 18:05:13,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:05:13,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:05:13,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:05:13,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:05:13,632 INFO L87 Difference]: Start difference. First operand 13383 states and 19713 transitions. Second operand 5 states. [2020-10-27 18:05:13,790 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:05:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:05:46,712 INFO L93 Difference]: Finished difference Result 33408 states and 50586 transitions. [2020-10-27 18:05:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:05:46,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2020-10-27 18:05:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:05:46,885 INFO L225 Difference]: With dead ends: 33408 [2020-10-27 18:05:46,886 INFO L226 Difference]: Without dead ends: 20031 [2020-10-27 18:05:46,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:05:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20031 states. [2020-10-27 18:05:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20031 to 19933. [2020-10-27 18:05:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19933 states. [2020-10-27 18:05:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19933 states to 19933 states and 30186 transitions. [2020-10-27 18:05:47,646 INFO L78 Accepts]: Start accepts. Automaton has 19933 states and 30186 transitions. Word has length 176 [2020-10-27 18:05:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:05:47,646 INFO L481 AbstractCegarLoop]: Abstraction has 19933 states and 30186 transitions. [2020-10-27 18:05:47,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:05:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 19933 states and 30186 transitions. [2020-10-27 18:05:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-27 18:05:47,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:47,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:05:47,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:05:47,663 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1052007339, now seen corresponding path program 1 times [2020-10-27 18:05:47,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:47,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745638665] [2020-10-27 18:05:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:48,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:49,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:50,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:50,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-27 18:05:50,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:05:50,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2971 [2020-10-27 18:05:50,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:05:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-10-27 18:05:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 18:05:50,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:50,945 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:05:50,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:05:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:50,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:50,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:50,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:05:50,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:50,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 18:05:50,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:05:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:05:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:05:51,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:05:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:51,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:51,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:51,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 18:05:51,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:05:51,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-27 18:05:51,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:51,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:05:51,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-27 18:05:51,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:05:51,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:05:51,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745638665] [2020-10-27 18:05:51,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:05:51,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:05:51,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879364304] [2020-10-27 18:05:51,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:05:51,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:05:51,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:05:51,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:05:51,749 INFO L87 Difference]: Start difference. First operand 19933 states and 30186 transitions. Second operand 6 states. [2020-10-27 18:05:51,936 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:05:52,693 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:05:53,207 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:06:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:06:41,538 INFO L93 Difference]: Finished difference Result 60203 states and 96607 transitions. [2020-10-27 18:06:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:06:41,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 234 [2020-10-27 18:06:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:06:41,742 INFO L225 Difference]: With dead ends: 60203 [2020-10-27 18:06:41,742 INFO L226 Difference]: Without dead ends: 40276 [2020-10-27 18:06:41,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 18:06:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40276 states. [2020-10-27 18:06:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40276 to 40249. [2020-10-27 18:06:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40249 states. [2020-10-27 18:06:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40249 states to 40249 states and 57006 transitions. [2020-10-27 18:06:43,727 INFO L78 Accepts]: Start accepts. Automaton has 40249 states and 57006 transitions. Word has length 234 [2020-10-27 18:06:43,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:06:43,728 INFO L481 AbstractCegarLoop]: Abstraction has 40249 states and 57006 transitions. [2020-10-27 18:06:43,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:06:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40249 states and 57006 transitions. [2020-10-27 18:06:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-27 18:06:43,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:06:43,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:06:43,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:06:43,748 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:06:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:06:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1885539734, now seen corresponding path program 1 times [2020-10-27 18:06:43,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:06:43,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991130794] [2020-10-27 18:06:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:06:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:43,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:44,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:46,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:46,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 18:06:46,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:06:46,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2619 [2020-10-27 18:06:46,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:06:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-10-27 18:06:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:06:46,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:06:46,780 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:06:46,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:06:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:46,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:46,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:06:46,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:06:46,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:46,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:06:46,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:46,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:06:46,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:46,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:06:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:46,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:47,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:47,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 18:06:47,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-27 18:06:47,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:47,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:06:47,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-27 18:06:47,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:06:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:06:47,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991130794] [2020-10-27 18:06:47,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:06:47,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:06:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771353136] [2020-10-27 18:06:47,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:06:47,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:06:47,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:06:47,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:06:47,453 INFO L87 Difference]: Start difference. First operand 40249 states and 57006 transitions. Second operand 5 states. [2020-10-27 18:06:47,644 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 66