/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:02:49,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:02:49,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:02:49,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:02:49,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:02:49,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:02:49,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:02:49,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:02:49,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:02:49,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:02:49,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:02:49,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:02:49,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:02:49,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:02:49,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:02:49,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:02:49,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:02:49,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:02:49,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:02:49,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:02:49,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:02:49,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:02:49,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:02:49,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:02:49,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:02:49,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:02:49,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:02:49,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:02:49,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:02:49,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:02:49,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:02:49,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:02:49,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:02:49,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:02:49,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:02:49,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:02:49,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:02:49,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:02:49,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:02:49,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:02:49,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:02:49,881 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 23:02:49,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:02:49,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:02:49,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:02:49,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:02:49,936 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:02:49,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:02:49,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:02:49,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:02:49,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:02:49,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:02:49,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:02:49,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:02:49,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:02:49,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:02:49,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:02:49,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:02:49,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:02:49,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:02:49,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:02:49,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:02:49,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:02:49,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:02:49,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:02:49,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:02:49,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:02:49,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:02:49,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:02:49,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:02:49,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:02:49,942 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:02:50,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:02:50,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:02:50,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:02:50,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:02:50,405 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:02:50,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label02.c [2020-10-26 23:02:50,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3921b78/3a8ff1aff1a7462f8024e2ef2d4e890a/FLAG1c2e9e36b [2020-10-26 23:02:51,634 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:02:51,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label02.c [2020-10-26 23:02:51,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3921b78/3a8ff1aff1a7462f8024e2ef2d4e890a/FLAG1c2e9e36b [2020-10-26 23:02:52,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3921b78/3a8ff1aff1a7462f8024e2ef2d4e890a [2020-10-26 23:02:52,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:02:52,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:02:52,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:02:52,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:02:52,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:02:52,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:02:52" (1/1) ... [2020-10-26 23:02:52,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c63db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:52, skipping insertion in model container [2020-10-26 23:02:52,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:02:52" (1/1) ... [2020-10-26 23:02:52,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:02:52,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:02:53,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:02:53,966 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:02:54,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:02:54,901 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:02:54,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54 WrapperNode [2020-10-26 23:02:54,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:02:54,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:02:54,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:02:54,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:02:54,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (1/1) ... [2020-10-26 23:02:54,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (1/1) ... [2020-10-26 23:02:55,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (1/1) ... [2020-10-26 23:02:55,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (1/1) ... [2020-10-26 23:02:55,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (1/1) ... [2020-10-26 23:02:55,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (1/1) ... [2020-10-26 23:02:55,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (1/1) ... [2020-10-26 23:02:55,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:02:55,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:02:55,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:02:55,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:02:55,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (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 23:02:55,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:02:55,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:02:55,532 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:02:55,532 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:02:55,532 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:02:55,532 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:02:55,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:02:55,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:02:55,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:02:55,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:02:55,535 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:02:55,535 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:02:55,535 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:02:55,536 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:02:55,536 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:02:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:02:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:02:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:02:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:02:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:02:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:02:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:02:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:02:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:02:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:03:05,509 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:03:05,510 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:03:05,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:03:05 BoogieIcfgContainer [2020-10-26 23:03:05,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:03:05,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:03:05,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:03:05,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:03:05,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:02:52" (1/3) ... [2020-10-26 23:03:05,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309038ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:03:05, skipping insertion in model container [2020-10-26 23:03:05,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:54" (2/3) ... [2020-10-26 23:03:05,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309038ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:03:05, skipping insertion in model container [2020-10-26 23:03:05,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:03:05" (3/3) ... [2020-10-26 23:03:05,525 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label02.c [2020-10-26 23:03:05,539 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:03:05,550 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:03:05,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:03:05,624 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:03:05,625 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:03:05,625 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:03:05,625 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:03:05,625 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:03:05,625 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:03:05,625 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:03:05,626 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:03:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:03:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 23:03:05,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:05,699 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] [2020-10-26 23:03:05,699 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash 301672410, now seen corresponding path program 1 times [2020-10-26 23:03:05,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:05,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338307712] [2020-10-26 23:03:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:06,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:06,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:06,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 23:03:06,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:06,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-26 23:03:06,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:06,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:03:06,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:03:06,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 23:03:06,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 23:03:06,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:03:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:06,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:06,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:06,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:03:06,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:06,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 23:03:06,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:06,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:03:06,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:06,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:03:06,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:06,857 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 23:03:06,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338307712] [2020-10-26 23:03:06,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:03:06,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:03:06,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192706691] [2020-10-26 23:03:06,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:03:06,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:03:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:03:06,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:03:06,896 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:03:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:03:26,888 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-26 23:03:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:03:26,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-26 23:03:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:03:26,943 INFO L225 Difference]: With dead ends: 3235 [2020-10-26 23:03:26,943 INFO L226 Difference]: Without dead ends: 2027 [2020-10-26 23:03:26,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:03:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-26 23:03:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-26 23:03:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-26 23:03:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-26 23:03:27,211 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 46 [2020-10-26 23:03:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:03:27,213 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-26 23:03:27,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:03:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-26 23:03:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 23:03:27,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:27,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:27,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:03:27,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1097423314, now seen corresponding path program 1 times [2020-10-26 23:03:27,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:27,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589696777] [2020-10-26 23:03:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:27,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:29,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:29,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:29,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 23:03:29,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:03:29,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2665 [2020-10-26 23:03:30,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:03:30,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:03:30,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:03:30,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:03:30,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:03:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:30,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:30,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:30,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:03:30,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:30,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:03:30,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:30,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:03:30,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:30,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:03:30,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 23:03:30,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:03:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:30,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:30,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:30,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:03:30,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:30,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-26 23:03:30,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:03:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:03:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:03:30,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:03:30,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589696777] [2020-10-26 23:03:30,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:03:30,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:03:30,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046088280] [2020-10-26 23:03:30,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:03:30,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:03:30,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:03:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:03:30,553 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-26 23:03:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:03:57,238 INFO L93 Difference]: Finished difference Result 5864 states and 9702 transitions. [2020-10-26 23:03:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:03:57,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-26 23:03:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:03:57,270 INFO L225 Difference]: With dead ends: 5864 [2020-10-26 23:03:57,270 INFO L226 Difference]: Without dead ends: 3860 [2020-10-26 23:03:57,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:03:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2020-10-26 23:03:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3761. [2020-10-26 23:03:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3761 states. [2020-10-26 23:03:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3761 states to 3761 states and 5632 transitions. [2020-10-26 23:03:57,440 INFO L78 Accepts]: Start accepts. Automaton has 3761 states and 5632 transitions. Word has length 121 [2020-10-26 23:03:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:03:57,441 INFO L481 AbstractCegarLoop]: Abstraction has 3761 states and 5632 transitions. [2020-10-26 23:03:57,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:03:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3761 states and 5632 transitions. [2020-10-26 23:03:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-26 23:03:57,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:57,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:57,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:03:57,445 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1846535786, now seen corresponding path program 1 times [2020-10-26 23:03:57,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:57,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194116931] [2020-10-26 23:03:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:57,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:57,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:58,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:58,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 23:03:58,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:03:58,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-26 23:03:58,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:03:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:03:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:03:58,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:58,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:03:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:58,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:58,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:58,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:03:58,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:58,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:03:58,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:03:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:03:58,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:58,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:03:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:59,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:59,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:03:59,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-26 23:03:59,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:03:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:03:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:03:59,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:03:59,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194116931] [2020-10-26 23:03:59,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:03:59,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:03:59,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775936435] [2020-10-26 23:03:59,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:03:59,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:03:59,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:03:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:03:59,357 INFO L87 Difference]: Start difference. First operand 3761 states and 5632 transitions. Second operand 7 states. [2020-10-26 23:04:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:31,233 INFO L93 Difference]: Finished difference Result 11317 states and 17470 transitions. [2020-10-26 23:04:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:04:31,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-26 23:04:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:31,293 INFO L225 Difference]: With dead ends: 11317 [2020-10-26 23:04:31,294 INFO L226 Difference]: Without dead ends: 7562 [2020-10-26 23:04:31,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:04:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7562 states. [2020-10-26 23:04:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7562 to 7337. [2020-10-26 23:04:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7337 states. [2020-10-26 23:04:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7337 states to 7337 states and 10761 transitions. [2020-10-26 23:04:31,596 INFO L78 Accepts]: Start accepts. Automaton has 7337 states and 10761 transitions. Word has length 135 [2020-10-26 23:04:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:31,600 INFO L481 AbstractCegarLoop]: Abstraction has 7337 states and 10761 transitions. [2020-10-26 23:04:31,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:04:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7337 states and 10761 transitions. [2020-10-26 23:04:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 23:04:31,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:31,609 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:31,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:04:31,614 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1112261266, now seen corresponding path program 1 times [2020-10-26 23:04:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:31,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743323689] [2020-10-26 23:04:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:31,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:32,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:32,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:32,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-26 23:04:32,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:04:32,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-26 23:04:32,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:32,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:32,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:32,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 23:04:32,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:32,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:32,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:32,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:32,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:32,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:32,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 23:04:32,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:32,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:32,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:32,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:33,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:33,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:04:33,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:33,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-26 23:04:33,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:04:33,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:33,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743323689] [2020-10-26 23:04:33,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:33,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:04:33,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207821437] [2020-10-26 23:04:33,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:33,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:33,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:33,363 INFO L87 Difference]: Start difference. First operand 7337 states and 10761 transitions. Second operand 7 states. [2020-10-26 23:05:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:03,708 INFO L93 Difference]: Finished difference Result 22297 states and 34553 transitions. [2020-10-26 23:05:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:05:03,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2020-10-26 23:05:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:03,837 INFO L225 Difference]: With dead ends: 22297 [2020-10-26 23:05:03,837 INFO L226 Difference]: Without dead ends: 14966 [2020-10-26 23:05:03,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:05:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14966 states. [2020-10-26 23:05:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14966 to 14644. [2020-10-26 23:05:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14644 states. [2020-10-26 23:05:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14644 states to 14644 states and 20128 transitions. [2020-10-26 23:05:04,471 INFO L78 Accepts]: Start accepts. Automaton has 14644 states and 20128 transitions. Word has length 153 [2020-10-26 23:05:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:04,473 INFO L481 AbstractCegarLoop]: Abstraction has 14644 states and 20128 transitions. [2020-10-26 23:05:04,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:05:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 14644 states and 20128 transitions. [2020-10-26 23:05:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-26 23:05:04,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:04,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:04,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:05:04,481 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash -624326994, now seen corresponding path program 1 times [2020-10-26 23:05:04,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:04,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45723270] [2020-10-26 23:05:04,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:04,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:06,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:06,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 23:05:06,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:05:06,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1594 [2020-10-26 23:05:06,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:06,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:05:06,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:06,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 23:05:06,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:06,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:06,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:06,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:06,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:06,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:05:06,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:06,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:06,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:06,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:06,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:06,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:06,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:06,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:06,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 23:05:06,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:06,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-26 23:05:06,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 23:05:06,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:05:06,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45723270] [2020-10-26 23:05:06,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:05:06,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:05:06,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744388080] [2020-10-26 23:05:06,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:05:06,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:06,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:05:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:05:06,840 INFO L87 Difference]: Start difference. First operand 14644 states and 20128 transitions. Second operand 7 states. [2020-10-26 23:05:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:31,618 INFO L93 Difference]: Finished difference Result 43749 states and 64367 transitions. [2020-10-26 23:05:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:05:31,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2020-10-26 23:05:31,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:31,764 INFO L225 Difference]: With dead ends: 43749 [2020-10-26 23:05:31,764 INFO L226 Difference]: Without dead ends: 29111 [2020-10-26 23:05:31,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:05:31,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29111 states. [2020-10-26 23:05:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29111 to 27971. [2020-10-26 23:05:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27971 states. [2020-10-26 23:05:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27971 states to 27971 states and 37029 transitions. [2020-10-26 23:05:32,814 INFO L78 Accepts]: Start accepts. Automaton has 27971 states and 37029 transitions. Word has length 164 [2020-10-26 23:05:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:32,815 INFO L481 AbstractCegarLoop]: Abstraction has 27971 states and 37029 transitions. [2020-10-26 23:05:32,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:05:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27971 states and 37029 transitions. [2020-10-26 23:05:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-26 23:05:32,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:32,822 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:05:32,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:05:32,822 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1804933090, now seen corresponding path program 1 times [2020-10-26 23:05:32,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:32,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861234331] [2020-10-26 23:05:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:32,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:33,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:33,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:37,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:37,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-26 23:05:37,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:05:37,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 23:05:37,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:37,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:05:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:05:37,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:38,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:38,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:38,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:38,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:38,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:38,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:05:38,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:38,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:38,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:38,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:38,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:38,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:05:38,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:38,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-26 23:05:38,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:38,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:38,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:38,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:05:38,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:38,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:05:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:38,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:38,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:38,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:05:38,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:38,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 23:05:38,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:05:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:05:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:05:38,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:05:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 76 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:05:38,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861234331] [2020-10-26 23:05:38,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:05:38,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:05:38,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012918523] [2020-10-26 23:05:38,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:05:38,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:38,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:05:38,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:05:38,888 INFO L87 Difference]: Start difference. First operand 27971 states and 37029 transitions. Second operand 7 states. [2020-10-26 23:05:39,065 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:05:41,445 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:06:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:06:04,592 INFO L93 Difference]: Finished difference Result 57406 states and 76487 transitions. [2020-10-26 23:06:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:06:04,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 246 [2020-10-26 23:06:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:06:04,702 INFO L225 Difference]: With dead ends: 57406 [2020-10-26 23:06:04,702 INFO L226 Difference]: Without dead ends: 29441 [2020-10-26 23:06:04,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:06:04,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29441 states. [2020-10-26 23:06:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29441 to 29013. [2020-10-26 23:06:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29013 states. [2020-10-26 23:06:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29013 states to 29013 states and 38392 transitions. [2020-10-26 23:06:05,623 INFO L78 Accepts]: Start accepts. Automaton has 29013 states and 38392 transitions. Word has length 246 [2020-10-26 23:06:05,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:06:05,624 INFO L481 AbstractCegarLoop]: Abstraction has 29013 states and 38392 transitions. [2020-10-26 23:06:05,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:06:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 29013 states and 38392 transitions. [2020-10-26 23:06:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 23:06:05,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:06:05,630 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:06:05,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:06:05,630 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:06:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:06:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1488434219, now seen corresponding path program 1 times [2020-10-26 23:06:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:06:05,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464438074] [2020-10-26 23:06:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:06:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:05,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:06,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:07,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:07,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 23:06:07,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:06:07,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1936 [2020-10-26 23:06:07,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:07,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:07,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:06:07,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:06:07,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:07,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:06:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:07,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:07,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:06:07,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:07,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:06:07,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:07,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:06:07,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:07,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:06:07,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:07,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:06:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:07,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:08,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:08,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:06:08,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:08,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 23:06:08,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:06:08,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:08,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:06:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:08,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:08,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:06:08,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:08,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-26 23:06:08,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:08,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:08,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:06:08,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:06:08,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:06:08,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464438074] [2020-10-26 23:06:08,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:06:08,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:06:08,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571195436] [2020-10-26 23:06:08,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:06:08,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:06:08,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:06:08,523 INFO L87 Difference]: Start difference. First operand 29013 states and 38392 transitions. Second operand 7 states.