/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem05_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:07:31,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:07:31,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:07:31,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:07:31,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:07:31,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:07:31,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:07:31,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:07:31,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:07:31,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:07:31,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:07:31,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:07:31,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:07:31,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:07:31,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:07:31,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:07:31,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:07:31,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:07:31,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:07:31,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:07:31,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:07:31,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:07:31,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:07:31,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:07:31,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:07:31,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:07:31,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:07:31,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:07:31,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:07:31,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:07:31,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:07:31,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:07:31,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:07:31,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:07:31,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:07:31,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:07:31,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:07:31,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:07:31,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:07:31,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:07:31,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:07:31,911 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 16:07:31,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:07:31,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:07:31,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:07:31,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:07:31,972 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:07:31,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:07:31,973 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:07:31,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:07:31,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:07:31,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:07:31,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:07:31,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:07:31,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:07:31,975 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:07:31,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:07:31,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:07:31,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:07:31,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:07:31,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:07:31,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:07:31,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:07:31,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:07:31,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:07:31,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:07:31,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:07:31,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:07:31,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:07:31,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:07:31,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:07:31,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:07:32,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:07:32,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:07:32,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:07:32,478 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:07:32,479 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:07:32,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label04.c [2020-10-27 16:07:32,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab922c379/c5f655d7e33f4d2490fb29a319a08b9d/FLAG1251ef14c [2020-10-27 16:07:33,878 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:07:33,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label04.c [2020-10-27 16:07:33,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab922c379/c5f655d7e33f4d2490fb29a319a08b9d/FLAG1251ef14c [2020-10-27 16:07:34,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab922c379/c5f655d7e33f4d2490fb29a319a08b9d [2020-10-27 16:07:34,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:07:34,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:07:34,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:07:34,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:07:34,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:07:34,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:07:34" (1/1) ... [2020-10-27 16:07:34,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc51e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:34, skipping insertion in model container [2020-10-27 16:07:34,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:07:34" (1/1) ... [2020-10-27 16:07:34,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:07:34,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:07:36,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:07:36,741 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:07:38,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:07:38,121 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:07:38,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38 WrapperNode [2020-10-27 16:07:38,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:07:38,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:07:38,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:07:38,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:07:38,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (1/1) ... [2020-10-27 16:07:38,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (1/1) ... [2020-10-27 16:07:38,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (1/1) ... [2020-10-27 16:07:38,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (1/1) ... [2020-10-27 16:07:38,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (1/1) ... [2020-10-27 16:07:38,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (1/1) ... [2020-10-27 16:07:38,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (1/1) ... [2020-10-27 16:07:38,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:07:38,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:07:38,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:07:38,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:07:38,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (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 16:07:38,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:07:38,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:07:38,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:07:38,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:07:38,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:07:38,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:07:38,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:07:38,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:07:38,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 16:07:38,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-27 16:07:38,909 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-27 16:07:38,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:07:38,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:07:38,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:07:38,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:07:38,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:07:38,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:07:38,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 16:07:38,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-27 16:07:38,912 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-27 16:07:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:07:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:07:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:07:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:07:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:07:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:07:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:07:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:07:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:07:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:07:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:07:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:07:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:07:48,972 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:07:48,975 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:07:48,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:07:48 BoogieIcfgContainer [2020-10-27 16:07:48,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:07:48,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:07:48,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:07:48,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:07:48,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:07:34" (1/3) ... [2020-10-27 16:07:48,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649c8006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:07:48, skipping insertion in model container [2020-10-27 16:07:48,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:38" (2/3) ... [2020-10-27 16:07:48,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649c8006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:07:48, skipping insertion in model container [2020-10-27 16:07:48,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:07:48" (3/3) ... [2020-10-27 16:07:48,991 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label04.c [2020-10-27 16:07:49,004 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:07:49,011 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:07:49,026 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:07:49,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:07:49,070 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:07:49,070 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:07:49,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:07:49,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:07:49,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:07:49,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:07:49,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:07:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-27 16:07:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1714 [2020-10-27 16:07:49,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:07:49,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:49,278 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:07:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:07:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1267193593, now seen corresponding path program 1 times [2020-10-27 16:07:49,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:07:49,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070863685] [2020-10-27 16:07:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:07:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:55,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:55,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1737 [2020-10-27 16:07:55,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:55,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 16:07:55,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:55,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:07:55,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:07:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1728 [2020-10-27 16:07:55,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 16:07:57,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:07:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:07:57,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:07:57,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:07:57,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:07:57,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:07:57,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 16:07:57,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:07:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:07:57,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:07:57,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:07:57,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:00,934 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 16:08:00,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070863685] [2020-10-27 16:08:00,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:08:00,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:08:00,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920954199] [2020-10-27 16:08:00,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:08:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:08:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:08:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:08:00,964 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-27 16:08:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:08:23,774 INFO L93 Difference]: Finished difference Result 6365 states and 11967 transitions. [2020-10-27 16:08:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:08:23,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1713 [2020-10-27 16:08:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:08:23,835 INFO L225 Difference]: With dead ends: 6365 [2020-10-27 16:08:23,836 INFO L226 Difference]: Without dead ends: 4075 [2020-10-27 16:08:23,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 16:08:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-27 16:08:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4005. [2020-10-27 16:08:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4005 states. [2020-10-27 16:08:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 6505 transitions. [2020-10-27 16:08:24,114 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 6505 transitions. Word has length 1713 [2020-10-27 16:08:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:08:24,120 INFO L481 AbstractCegarLoop]: Abstraction has 4005 states and 6505 transitions. [2020-10-27 16:08:24,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:08:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 6505 transitions. [2020-10-27 16:08:24,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1725 [2020-10-27 16:08:24,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:08:24,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:08:24,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:08:24,278 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:08:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:08:24,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1660301569, now seen corresponding path program 1 times [2020-10-27 16:08:24,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:08:24,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816845098] [2020-10-27 16:08:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:08:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:25,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:30,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:30,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1750 [2020-10-27 16:08:30,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:08:30,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5190 [2020-10-27 16:08:30,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:08:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 16:08:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1725 [2020-10-27 16:08:30,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:08:31,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:08:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:31,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:31,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:31,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:08:31,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:08:31,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 16:08:31,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:31,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:08:31,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:08:31,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:08:31,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:08:31,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:08:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:08:31,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:08:31,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:08:31,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 16:08:31,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:08:31,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 16:08:31,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:08:31,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:08:31,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:08:31,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 16:08:31,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:08:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:08:34,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816845098] [2020-10-27 16:08:34,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:08:34,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:08:34,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636486177] [2020-10-27 16:08:34,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:08:34,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:08:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:08:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:08:34,488 INFO L87 Difference]: Start difference. First operand 4005 states and 6505 transitions. Second operand 5 states. [2020-10-27 16:09:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:09:01,050 INFO L93 Difference]: Finished difference Result 11599 states and 19034 transitions. [2020-10-27 16:09:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:09:01,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1724 [2020-10-27 16:09:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:09:01,100 INFO L225 Difference]: With dead ends: 11599 [2020-10-27 16:09:01,101 INFO L226 Difference]: Without dead ends: 7600 [2020-10-27 16:09:01,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:09:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2020-10-27 16:09:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 7557. [2020-10-27 16:09:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7557 states. [2020-10-27 16:09:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7557 states to 7557 states and 10688 transitions. [2020-10-27 16:09:01,359 INFO L78 Accepts]: Start accepts. Automaton has 7557 states and 10688 transitions. Word has length 1724 [2020-10-27 16:09:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:09:01,363 INFO L481 AbstractCegarLoop]: Abstraction has 7557 states and 10688 transitions. [2020-10-27 16:09:01,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:09:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 7557 states and 10688 transitions. [2020-10-27 16:09:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1726 [2020-10-27 16:09:01,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:09:01,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:09:01,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:09:01,413 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:09:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:09:01,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1294295299, now seen corresponding path program 1 times [2020-10-27 16:09:01,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:09:01,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181763846] [2020-10-27 16:09:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:09:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:09:01,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:09:01,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:09:06,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:09:06,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1751 [2020-10-27 16:09:06,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:09:06,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-27 16:09:06,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:09:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 16:09:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 16:09:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1273 [2020-10-27 16:09:06,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:09:12,287 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 16:09:12,552 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-27 16:09:12,960 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2020-10-27 16:09:13,193 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2020-10-27 16:09:13,370 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-27 16:09:13,571 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-27 16:09:13,743 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-27 16:09:13,900 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-27 16:09:14,656 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-27 16:09:14,870 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-27 16:09:15,197 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-10-27 16:09:15,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:09:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:09:15,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:09:15,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:09:15,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:09:15,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:09:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:09:15,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:09:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:09:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:09:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:09:15,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:09:15,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:09:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:09:15,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:09:15,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:09:15,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 16:09:15,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:09:15,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 16:09:15,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:09:15,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:09:15,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:09:15,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 16:09:15,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:09:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:09:43,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181763846] [2020-10-27 16:09:43,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:09:43,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 16:09:43,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787922581] [2020-10-27 16:09:43,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 16:09:43,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:09:43,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 16:09:43,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 16:09:43,656 INFO L87 Difference]: Start difference. First operand 7557 states and 10688 transitions. Second operand 23 states. [2020-10-27 16:09:44,194 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 16:09:44,533 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 16:09:49,100 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2020-10-27 16:09:52,936 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2020-10-27 16:09:55,622 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:09:55,898 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 16:09:57,107 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 16:10:00,914 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2020-10-27 16:10:05,919 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-27 16:10:06,201 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 16:10:15,409 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-27 16:10:15,677 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 16:10:25,499 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-27 16:10:25,785 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 16:10:35,898 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:10:36,219 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 16:10:41,007 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-10-27 16:10:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:10:52,233 INFO L93 Difference]: Finished difference Result 16429 states and 23997 transitions. [2020-10-27 16:10:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 16:10:52,235 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1725 [2020-10-27 16:10:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:10:52,285 INFO L225 Difference]: With dead ends: 16429 [2020-10-27 16:10:52,285 INFO L226 Difference]: Without dead ends: 8878 [2020-10-27 16:10:52,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 16:10:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8878 states. [2020-10-27 16:10:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8878 to 8848. [2020-10-27 16:10:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8848 states. [2020-10-27 16:10:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8848 states to 8848 states and 11999 transitions. [2020-10-27 16:10:52,546 INFO L78 Accepts]: Start accepts. Automaton has 8848 states and 11999 transitions. Word has length 1725 [2020-10-27 16:10:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:10:52,548 INFO L481 AbstractCegarLoop]: Abstraction has 8848 states and 11999 transitions. [2020-10-27 16:10:52,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 16:10:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 8848 states and 11999 transitions. [2020-10-27 16:10:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1736 [2020-10-27 16:10:52,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:10:52,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:10:52,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:10:52,602 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:10:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:10:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1760122216, now seen corresponding path program 1 times [2020-10-27 16:10:52,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:10:52,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355042308] [2020-10-27 16:10:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:10:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:10:53,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:10:54,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:10:56,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:10:58,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:10:58,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1761 [2020-10-27 16:10:58,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:10:58,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-27 16:10:58,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:10:58,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:10:58,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 16:10:58,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1725 [2020-10-27 16:10:58,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:10:59,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:10:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:10:59,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:10:59,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:10:59,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:10:59,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:10:59,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 16:10:59,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:10:59,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:10:59,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:10:59,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:10:59,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:10:59,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:10:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:10:59,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:10:59,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:10:59,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 16:10:59,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:10:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 16:10:59,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:10:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:10:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:10:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:10:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:11:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:11:01,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355042308] [2020-10-27 16:11:01,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:11:01,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:11:01,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247335029] [2020-10-27 16:11:01,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:11:01,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:11:01,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:11:01,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:11:01,651 INFO L87 Difference]: Start difference. First operand 8848 states and 11999 transitions. Second operand 5 states.