./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-lopstr16/break-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-lopstr16/break-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5775473fb8b2fb76c3950e7e2a13fee49ca8c66dcc7d0ea40674a33c8d89da --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:20:42,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:20:42,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:20:42,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:20:42,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:20:42,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:20:42,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:20:42,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:20:42,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:20:42,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:20:42,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:20:42,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:20:42,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:20:42,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:20:42,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:20:42,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:20:42,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:20:42,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:20:42,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:20:42,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:20:42,853 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:20:42,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:20:42,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:20:42,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:20:42,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:20:42,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:20:42,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:20:42,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:20:42,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:20:42,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:20:42,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:20:42,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:20:42,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:20:42,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:20:42,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:20:42,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:20:42,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:20:42,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:20:42,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:20:42,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:20:42,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:20:42,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:20:42,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:20:42,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:20:42,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:20:42,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:20:42,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:20:42,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:20:42,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:20:42,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:20:42,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:20:42,888 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:20:42,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:20:42,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:20:42,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:20:42,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:20:42,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:20:42,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:20:42,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:20:42,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:20:42,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:20:42,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:20:42,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:20:42,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:20:42,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:20:42,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:20:42,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:20:42,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:20:42,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:20:42,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:20:42,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:20:42,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:20:42,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:20:42,892 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:20:42,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:20:42,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:20:42,893 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5775473fb8b2fb76c3950e7e2a13fee49ca8c66dcc7d0ea40674a33c8d89da [2022-07-19 10:20:43,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:20:43,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:20:43,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:20:43,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:20:43,140 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:20:43,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/break-1.i [2022-07-19 10:20:43,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a724520a4/485787ee0eb64b9b9fd8f38a6876cf86/FLAG068a20333 [2022-07-19 10:20:43,634 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:20:43,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-1.i [2022-07-19 10:20:43,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a724520a4/485787ee0eb64b9b9fd8f38a6876cf86/FLAG068a20333 [2022-07-19 10:20:44,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a724520a4/485787ee0eb64b9b9fd8f38a6876cf86 [2022-07-19 10:20:44,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:20:44,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:20:44,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:20:44,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:20:44,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:20:44,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:20:44" (1/1) ... [2022-07-19 10:20:44,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e162966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:44, skipping insertion in model container [2022-07-19 10:20:44,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:20:44" (1/1) ... [2022-07-19 10:20:44,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:20:44,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:20:44,247 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-1.i[800,813] [2022-07-19 10:20:44,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:20:50,796 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:20:50,807 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-1.i[800,813] [2022-07-19 10:20:50,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:20:50,825 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:20:50,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50 WrapperNode [2022-07-19 10:20:50,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:20:50,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:20:50,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:20:50,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:20:50,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,855 INFO L137 Inliner]: procedures = 19, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-07-19 10:20:50,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:20:50,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:20:50,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:20:50,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:20:50,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:20:50,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:20:50,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:20:50,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:20:50,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (1/1) ... [2022-07-19 10:20:50,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:20:50,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:50,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:20:50,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 10:20:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 10:20:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:20:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:20:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 10:20:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:20:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:20:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:20:51,035 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:20:51,036 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:20:51,126 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:20:51,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:20:51,132 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 10:20:51,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:20:51 BoogieIcfgContainer [2022-07-19 10:20:51,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:20:51,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:20:51,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:20:51,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:20:51,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:20:44" (1/3) ... [2022-07-19 10:20:51,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ccdebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:20:51, skipping insertion in model container [2022-07-19 10:20:51,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:20:50" (2/3) ... [2022-07-19 10:20:51,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ccdebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:20:51, skipping insertion in model container [2022-07-19 10:20:51,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:20:51" (3/3) ... [2022-07-19 10:20:51,142 INFO L111 eAbstractionObserver]: Analyzing ICFG break-1.i [2022-07-19 10:20:51,154 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:20:51,155 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:20:51,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:20:51,217 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@33dbadd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20e7bce6 [2022-07-19 10:20:51,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:20:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 10:20:51,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:51,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:51,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:51,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2022-07-19 10:20:51,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:51,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118226560] [2022-07-19 10:20:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:51,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:51,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118226560] [2022-07-19 10:20:51,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118226560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:20:51,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:20:51,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:20:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44918096] [2022-07-19 10:20:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:20:51,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:20:51,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:20:51,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:20:51,391 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:51,405 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-07-19 10:20:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:20:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-19 10:20:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:51,414 INFO L225 Difference]: With dead ends: 29 [2022-07-19 10:20:51,415 INFO L226 Difference]: Without dead ends: 13 [2022-07-19 10:20:51,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:20:51,426 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:51,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:20:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-19 10:20:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-19 10:20:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-07-19 10:20:51,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2022-07-19 10:20:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:51,460 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-07-19 10:20:51,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-07-19 10:20:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 10:20:51,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:51,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:51,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:20:51,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2022-07-19 10:20:51,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:51,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086525471] [2022-07-19 10:20:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:51,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:51,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086525471] [2022-07-19 10:20:51,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086525471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:20:51,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:20:51,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:20:51,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966738209] [2022-07-19 10:20:51,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:20:51,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:20:51,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:51,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:20:51,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:20:51,533 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:51,558 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-07-19 10:20:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:20:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-19 10:20:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:51,560 INFO L225 Difference]: With dead ends: 32 [2022-07-19 10:20:51,560 INFO L226 Difference]: Without dead ends: 24 [2022-07-19 10:20:51,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:20:51,561 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:51,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:20:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-19 10:20:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-07-19 10:20:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-07-19 10:20:51,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-07-19 10:20:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:51,566 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-07-19 10:20:51,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-07-19 10:20:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 10:20:51,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:51,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:51,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:20:51,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash -328289196, now seen corresponding path program 1 times [2022-07-19 10:20:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:51,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158225467] [2022-07-19 10:20:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:51,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:51,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158225467] [2022-07-19 10:20:51,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158225467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:20:51,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:20:51,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:20:51,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144175822] [2022-07-19 10:20:51,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:20:51,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:20:51,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:20:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:20:51,635 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:51,661 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-07-19 10:20:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:20:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-19 10:20:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:51,663 INFO L225 Difference]: With dead ends: 25 [2022-07-19 10:20:51,664 INFO L226 Difference]: Without dead ends: 14 [2022-07-19 10:20:51,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:20:51,665 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:51,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:20:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-19 10:20:51,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-19 10:20:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-07-19 10:20:51,674 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2022-07-19 10:20:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:51,674 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-07-19 10:20:51,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-07-19 10:20:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:20:51,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:51,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:51,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:20:51,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:51,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2022-07-19 10:20:51,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:51,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402462432] [2022-07-19 10:20:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:51,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:51,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:51,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402462432] [2022-07-19 10:20:51,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402462432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:51,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102785588] [2022-07-19 10:20:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:51,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:51,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:51,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:51,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:20:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:51,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:20:51,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:51,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:51,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102785588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:51,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:51,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 10:20:51,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976419165] [2022-07-19 10:20:51,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:20:51,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:51,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:20:51,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:20:51,886 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:51,963 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-07-19 10:20:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:20:51,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:20:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:51,966 INFO L225 Difference]: With dead ends: 53 [2022-07-19 10:20:51,967 INFO L226 Difference]: Without dead ends: 45 [2022-07-19 10:20:51,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:20:51,971 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:51,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:20:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-19 10:20:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 23. [2022-07-19 10:20:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-07-19 10:20:51,979 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2022-07-19 10:20:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:51,979 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-07-19 10:20:51,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-07-19 10:20:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:20:51,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:51,980 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:52,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:52,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:52,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:52,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1371826133, now seen corresponding path program 2 times [2022-07-19 10:20:52,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:52,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031953880] [2022-07-19 10:20:52,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:52,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:52,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031953880] [2022-07-19 10:20:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031953880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915790627] [2022-07-19 10:20:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:20:52,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:52,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:52,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:20:52,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:20:52,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:52,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:20:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:52,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:52,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915790627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:52,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:52,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 10:20:52,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447013430] [2022-07-19 10:20:52,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:52,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 10:20:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 10:20:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:20:52,528 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:52,637 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2022-07-19 10:20:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:20:52,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:20:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:52,639 INFO L225 Difference]: With dead ends: 113 [2022-07-19 10:20:52,639 INFO L226 Difference]: Without dead ends: 105 [2022-07-19 10:20:52,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:20:52,640 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 156 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:52,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 48 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:20:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-19 10:20:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2022-07-19 10:20:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-07-19 10:20:52,647 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 20 [2022-07-19 10:20:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:52,647 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-07-19 10:20:52,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-07-19 10:20:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:20:52,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:52,649 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:52,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:52,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:52,867 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash -332532075, now seen corresponding path program 3 times [2022-07-19 10:20:52,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:52,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858467758] [2022-07-19 10:20:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:52,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:53,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:53,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858467758] [2022-07-19 10:20:53,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858467758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:53,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748885545] [2022-07-19 10:20:53,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:20:53,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:53,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:53,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:53,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:20:54,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-19 10:20:54,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 10:20:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:54,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:54,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748885545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:54,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:54,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-19 10:20:54,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127724084] [2022-07-19 10:20:54,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:54,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 10:20:54,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 10:20:54,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 10:20:54,341 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:54,555 INFO L93 Difference]: Finished difference Result 233 states and 246 transitions. [2022-07-19 10:20:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:20:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 10:20:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:54,558 INFO L225 Difference]: With dead ends: 233 [2022-07-19 10:20:54,558 INFO L226 Difference]: Without dead ends: 225 [2022-07-19 10:20:54,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 10:20:54,559 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 326 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:54,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 100 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:20:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-19 10:20:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 77. [2022-07-19 10:20:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-19 10:20:54,568 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 38 [2022-07-19 10:20:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:54,569 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-19 10:20:54,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-19 10:20:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 10:20:54,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:54,571 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:54,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:54,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:54,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash 259163157, now seen corresponding path program 4 times [2022-07-19 10:20:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066318013] [2022-07-19 10:20:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:54,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:55,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:55,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066318013] [2022-07-19 10:20:55,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066318013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:55,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758970718] [2022-07-19 10:20:55,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:20:55,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:55,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:55,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:55,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:21:01,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:21:01,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:21:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 10:21:01,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:21:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:01,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:21:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:02,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758970718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:21:02,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:21:02,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-19 10:21:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702243516] [2022-07-19 10:21:02,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:21:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 10:21:02,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:21:02,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 10:21:02,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 10:21:02,006 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:21:02,609 INFO L93 Difference]: Finished difference Result 473 states and 498 transitions. [2022-07-19 10:21:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 10:21:02,610 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-19 10:21:02,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:21:02,612 INFO L225 Difference]: With dead ends: 473 [2022-07-19 10:21:02,613 INFO L226 Difference]: Without dead ends: 465 [2022-07-19 10:21:02,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 10:21:02,615 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1172 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:21:02,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 194 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:21:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-19 10:21:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 149. [2022-07-19 10:21:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-07-19 10:21:02,629 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 74 [2022-07-19 10:21:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:21:02,630 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-07-19 10:21:02,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-07-19 10:21:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-19 10:21:02,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:21:02,636 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:21:02,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:21:02,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:02,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:21:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:21:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1215209707, now seen corresponding path program 5 times [2022-07-19 10:21:02,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:21:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630683919] [2022-07-19 10:21:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:21:02,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:21:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:21:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:03,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:21:03,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630683919] [2022-07-19 10:21:03,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630683919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:21:03,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395153555] [2022-07-19 10:21:03,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:21:03,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:03,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:21:03,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:21:03,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process