/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:45:52,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:45:52,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:45:52,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:45:52,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:45:52,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:45:52,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:45:52,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:45:52,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:45:52,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:45:52,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:45:52,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:45:52,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:45:52,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:45:52,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:45:52,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:45:52,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:45:52,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:45:52,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:45:53,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:45:53,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:45:53,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:45:53,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:45:53,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:45:53,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:45:53,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:45:53,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:45:53,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:45:53,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:45:53,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:45:53,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:45:53,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:45:53,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:45:53,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:45:53,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:45:53,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:45:53,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:45:53,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:45:53,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:45:53,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:45:53,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:45:53,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:45:53,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:45:53,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:45:53,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:45:53,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:45:53,122 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:45:53,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:45:53,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:45:53,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:45:53,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:45:53,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:45:53,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:45:53,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:45:53,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:45:53,126 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:45:53,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:45:53,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:45:53,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:45:53,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:45:53,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:45:53,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:45:53,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:45:53,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:45:53,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:45:53,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:45:53,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:45:53,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:45:53,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:45:53,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:45:53,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:45:53,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:45:53,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:45:53,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:45:53,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:45:53,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:45:53,707 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:45:53,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label32.c [2020-10-27 00:45:53,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa819a400/32382b6916a3477bbc2d783ff1b8fba9/FLAGc590a03e8 [2020-10-27 00:45:55,235 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:45:55,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label32.c [2020-10-27 00:45:55,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa819a400/32382b6916a3477bbc2d783ff1b8fba9/FLAGc590a03e8 [2020-10-27 00:45:55,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa819a400/32382b6916a3477bbc2d783ff1b8fba9 [2020-10-27 00:45:55,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:45:55,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:45:55,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:45:55,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:45:55,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:45:55,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:45:55" (1/1) ... [2020-10-27 00:45:55,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b560c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:55, skipping insertion in model container [2020-10-27 00:45:55,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:45:55" (1/1) ... [2020-10-27 00:45:55,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:45:55,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:45:58,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:45:58,240 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:45:59,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:45:59,531 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:45:59,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59 WrapperNode [2020-10-27 00:45:59,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:45:59,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:45:59,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:45:59,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:45:59,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (1/1) ... [2020-10-27 00:45:59,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (1/1) ... [2020-10-27 00:45:59,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (1/1) ... [2020-10-27 00:45:59,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (1/1) ... [2020-10-27 00:45:59,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (1/1) ... [2020-10-27 00:46:00,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (1/1) ... [2020-10-27 00:46:00,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (1/1) ... [2020-10-27 00:46:00,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:46:00,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:46:00,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:46:00,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:46:00,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:46:00,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:46:00,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:46:00,513 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:46:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:46:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:46:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:46:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:46:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:46:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:46:00,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:46:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:46:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:46:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:46:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:46:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:46:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:46:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:46:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:46:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:46:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:46:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:46:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:46:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:46:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:46:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:46:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:46:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:46:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:46:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:46:16,122 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:46:16,123 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:46:16,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:46:16 BoogieIcfgContainer [2020-10-27 00:46:16,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:46:16,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:46:16,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:46:16,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:46:16,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:45:55" (1/3) ... [2020-10-27 00:46:16,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42363e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:46:16, skipping insertion in model container [2020-10-27 00:46:16,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:59" (2/3) ... [2020-10-27 00:46:16,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42363e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:46:16, skipping insertion in model container [2020-10-27 00:46:16,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:46:16" (3/3) ... [2020-10-27 00:46:16,154 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label32.c [2020-10-27 00:46:16,170 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:46:16,179 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:46:16,198 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:46:16,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:46:16,245 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:46:16,245 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:46:16,245 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:46:16,245 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:46:16,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:46:16,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:46:16,245 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:46:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:46:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 00:46:16,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:46:16,324 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] [2020-10-27 00:46:16,324 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:46:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:46:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1202181949, now seen corresponding path program 1 times [2020-10-27 00:46:16,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:46:16,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272604078] [2020-10-27 00:46:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:46:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:16,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:17,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:17,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 00:46:17,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:17,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-27 00:46:17,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:46:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:46:17,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 00:46:17,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:46:17,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:46:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:17,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:17,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:17,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:46:17,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 00:46:17,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:46:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:46:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:46:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:46:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:46:17,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272604078] [2020-10-27 00:46:17,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:46:17,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:46:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519666853] [2020-10-27 00:46:17,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:46:17,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:46:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:46:17,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:46:17,797 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:46:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:46:52,290 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 00:46:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:46:52,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 00:46:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:46:52,359 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 00:46:52,359 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 00:46:52,383 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 [2020-10-27 00:46:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 00:46:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 00:46:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 00:46:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 00:46:52,697 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 26 [2020-10-27 00:46:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:46:52,698 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 00:46:52,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:46:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 00:46:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 00:46:52,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:46:52,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:46:52,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:46:52,714 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:46:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:46:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1684412835, now seen corresponding path program 1 times [2020-10-27 00:46:52,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:46:52,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17021334] [2020-10-27 00:46:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:46:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:52,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:54,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:54,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:46:54,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:46:54,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1636 [2020-10-27 00:46:54,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:54,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:46:54,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:46:54,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:46:54,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:46:54,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:46:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:54,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:54,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:54,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:46:54,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:54,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 00:46:54,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:54,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:46:54,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:46:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:46:54,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 00:46:54,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:46:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:54,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:54,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:54,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 00:46:54,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:54,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-27 00:46:54,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:46:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:46:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:46:54,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:46:55,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17021334] [2020-10-27 00:46:55,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:46:55,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:46:55,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298812362] [2020-10-27 00:46:55,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:46:55,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:46:55,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:46:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:46:55,098 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-27 00:46:55,252 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:47:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:47:48,048 INFO L93 Difference]: Finished difference Result 9523 states and 16481 transitions. [2020-10-27 00:47:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:47:48,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-27 00:47:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:47:48,095 INFO L225 Difference]: With dead ends: 9523 [2020-10-27 00:47:48,096 INFO L226 Difference]: Without dead ends: 6329 [2020-10-27 00:47:48,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:47:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2020-10-27 00:47:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 6215. [2020-10-27 00:47:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6215 states. [2020-10-27 00:47:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6215 states to 6215 states and 10300 transitions. [2020-10-27 00:47:48,342 INFO L78 Accepts]: Start accepts. Automaton has 6215 states and 10300 transitions. Word has length 98 [2020-10-27 00:47:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:47:48,343 INFO L481 AbstractCegarLoop]: Abstraction has 6215 states and 10300 transitions. [2020-10-27 00:47:48,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:47:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 6215 states and 10300 transitions. [2020-10-27 00:47:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 00:47:48,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:47:48,354 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:47:48,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:47:48,355 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:47:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:47:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1952859084, now seen corresponding path program 1 times [2020-10-27 00:47:48,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:47:48,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542350639] [2020-10-27 00:47:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:47:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:48,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:48,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:49,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:49,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 00:47:49,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:47:49,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1101 [2020-10-27 00:47:49,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:47:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:47:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 00:47:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:49,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:47:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:49,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:49,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:49,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:47:49,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:47:49,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:47:49,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:49,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:47:49,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:47:49,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:47:49,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:47:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:49,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:49,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:49,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:49,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:47:49,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:47:49,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-27 00:47:49,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:49,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:47:49,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:47:49,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:47:49,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:47:50,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542350639] [2020-10-27 00:47:50,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:47:50,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:47:50,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546986969] [2020-10-27 00:47:50,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:47:50,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:47:50,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:47:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:47:50,117 INFO L87 Difference]: Start difference. First operand 6215 states and 10300 transitions. Second operand 7 states. [2020-10-27 00:49:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:49:06,027 INFO L93 Difference]: Finished difference Result 24111 states and 41119 transitions. [2020-10-27 00:49:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:49:06,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-27 00:49:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:49:06,151 INFO L225 Difference]: With dead ends: 24111 [2020-10-27 00:49:06,151 INFO L226 Difference]: Without dead ends: 17902 [2020-10-27 00:49:06,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:49:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17902 states. [2020-10-27 00:49:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17902 to 17724. [2020-10-27 00:49:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17724 states. [2020-10-27 00:49:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17724 states to 17724 states and 27428 transitions. [2020-10-27 00:49:06,793 INFO L78 Accepts]: Start accepts. Automaton has 17724 states and 27428 transitions. Word has length 101 [2020-10-27 00:49:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:49:06,794 INFO L481 AbstractCegarLoop]: Abstraction has 17724 states and 27428 transitions. [2020-10-27 00:49:06,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:49:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17724 states and 27428 transitions. [2020-10-27 00:49:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 00:49:06,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:49:06,798 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:49:06,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:49:06,798 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:49:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:49:06,799 INFO L82 PathProgramCache]: Analyzing trace with hash -404023401, now seen corresponding path program 1 times [2020-10-27 00:49:06,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:49:06,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556003173] [2020-10-27 00:49:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:49:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:06,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:07,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:07,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:08,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:08,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 00:49:08,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:49:08,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1426 [2020-10-27 00:49:08,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:08,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:49:08,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:49:08,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-27 00:49:08,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:08,603 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:49:08,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:49:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:08,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:08,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:49:08,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:49:08,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:49:08,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:49:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:49:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:49:08,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:08,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:49:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:08,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:09,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:09,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 00:49:09,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:49:09,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 00:49:09,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:49:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:49:09,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 00:49:09,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:49:09,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556003173] [2020-10-27 00:49:09,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:49:09,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:49:09,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494464910] [2020-10-27 00:49:09,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:49:09,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:49:09,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:49:09,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:49:09,247 INFO L87 Difference]: Start difference. First operand 17724 states and 27428 transitions. Second operand 7 states. [2020-10-27 00:49:09,412 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:49:11,963 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66