./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/pipeline.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/systemc/pipeline.cil-1.c -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 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 06:32:21,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 06:32:21,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 06:32:21,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 06:32:21,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 06:32:21,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 06:32:21,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 06:32:21,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 06:32:21,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 06:32:21,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 06:32:21,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 06:32:21,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 06:32:21,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 06:32:21,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 06:32:21,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 06:32:21,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 06:32:21,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 06:32:21,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 06:32:21,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 06:32:21,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 06:32:21,905 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 06:32:21,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 06:32:21,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 06:32:21,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 06:32:21,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 06:32:21,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 06:32:21,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 06:32:21,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 06:32:21,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 06:32:21,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 06:32:21,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 06:32:21,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 06:32:21,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 06:32:21,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 06:32:21,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 06:32:21,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 06:32:21,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 06:32:21,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 06:32:21,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 06:32:21,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 06:32:21,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 06:32:21,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 06:32:21,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 06:32:21,953 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 06:32:21,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 06:32:21,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 06:32:21,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 06:32:21,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 06:32:21,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 06:32:21,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 06:32:21,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 06:32:21,956 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 06:32:21,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 06:32:21,956 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 06:32:21,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 06:32:21,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 06:32:21,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 06:32:21,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 06:32:21,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 06:32:21,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 06:32:21,957 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 06:32:21,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 06:32:21,958 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 06:32:21,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 06:32:21,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 06:32:21,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 06:32:21,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 06:32:21,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:32:21,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 06:32:21,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 06:32:21,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 06:32:21,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 06:32:21,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 06:32:21,959 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 06:32:21,960 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 06:32:21,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 06:32:21,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2022-07-12 06:32:22,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 06:32:22,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 06:32:22,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 06:32:22,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 06:32:22,191 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 06:32:22,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/pipeline.cil-1.c [2022-07-12 06:32:22,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f5c0f08/c5b2392b51ef4443acbf25247186c047/FLAG4aa36c1b1 [2022-07-12 06:32:22,664 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 06:32:22,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pipeline.cil-1.c [2022-07-12 06:32:22,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f5c0f08/c5b2392b51ef4443acbf25247186c047/FLAG4aa36c1b1 [2022-07-12 06:32:22,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f5c0f08/c5b2392b51ef4443acbf25247186c047 [2022-07-12 06:32:22,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 06:32:22,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 06:32:22,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 06:32:22,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 06:32:22,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 06:32:22,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:22,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc52a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22, skipping insertion in model container [2022-07-12 06:32:22,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:22,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 06:32:22,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 06:32:22,838 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/systemc/pipeline.cil-1.c[640,653] [2022-07-12 06:32:22,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:32:22,904 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 06:32:22,916 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/systemc/pipeline.cil-1.c[640,653] [2022-07-12 06:32:22,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:32:22,953 INFO L208 MainTranslator]: Completed translation [2022-07-12 06:32:22,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22 WrapperNode [2022-07-12 06:32:22,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 06:32:22,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 06:32:22,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 06:32:22,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 06:32:22,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:22,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,011 INFO L137 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 422 [2022-07-12 06:32:23,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 06:32:23,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 06:32:23,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 06:32:23,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 06:32:23,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 06:32:23,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 06:32:23,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 06:32:23,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 06:32:23,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (1/1) ... [2022-07-12 06:32:23,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:32:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:23,078 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) [2022-07-12 06:32:23,080 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 [2022-07-12 06:32:23,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 06:32:23,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 06:32:23,116 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2022-07-12 06:32:23,116 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2022-07-12 06:32:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 06:32:23,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 06:32:23,210 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 06:32:23,213 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 06:32:23,542 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 06:32:23,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 06:32:23,554 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 06:32:23,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:32:23 BoogieIcfgContainer [2022-07-12 06:32:23,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 06:32:23,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 06:32:23,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 06:32:23,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 06:32:23,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:32:22" (1/3) ... [2022-07-12 06:32:23,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fcba701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:32:23, skipping insertion in model container [2022-07-12 06:32:23,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:22" (2/3) ... [2022-07-12 06:32:23,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fcba701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:32:23, skipping insertion in model container [2022-07-12 06:32:23,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:32:23" (3/3) ... [2022-07-12 06:32:23,566 INFO L111 eAbstractionObserver]: Analyzing ICFG pipeline.cil-1.c [2022-07-12 06:32:23,579 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 06:32:23,579 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 06:32:23,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 06:32:23,626 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@6a264714, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@273b06f2 [2022-07-12 06:32:23,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 06:32:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 151 states have (on average 1.781456953642384) internal successors, (269), 153 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-12 06:32:23,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:23,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:23,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:23,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:23,664 INFO L85 PathProgramCache]: Analyzing trace with hash -827879702, now seen corresponding path program 1 times [2022-07-12 06:32:23,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:23,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806084333] [2022-07-12 06:32:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:23,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:24,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:24,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 06:32:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 06:32:24,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:24,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806084333] [2022-07-12 06:32:24,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806084333] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:24,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:32:24,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 06:32:24,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501243083] [2022-07-12 06:32:24,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:24,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 06:32:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:24,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 06:32:24,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 06:32:24,148 INFO L87 Difference]: Start difference. First operand has 157 states, 151 states have (on average 1.781456953642384) internal successors, (269), 153 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:24,848 INFO L93 Difference]: Finished difference Result 498 states and 888 transitions. [2022-07-12 06:32:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 06:32:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2022-07-12 06:32:24,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:24,871 INFO L225 Difference]: With dead ends: 498 [2022-07-12 06:32:24,871 INFO L226 Difference]: Without dead ends: 344 [2022-07-12 06:32:24,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:24,892 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 325 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:24,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 531 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:32:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-12 06:32:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 152. [2022-07-12 06:32:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.7551020408163265) internal successors, (258), 148 states have internal predecessors, (258), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 264 transitions. [2022-07-12 06:32:24,961 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 264 transitions. Word has length 94 [2022-07-12 06:32:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:24,962 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 264 transitions. [2022-07-12 06:32:24,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:24,962 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 264 transitions. [2022-07-12 06:32:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:24,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:24,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:24,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 06:32:24,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1071269142, now seen corresponding path program 1 times [2022-07-12 06:32:24,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:24,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070416993] [2022-07-12 06:32:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:24,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:25,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:25,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-07-12 06:32:25,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:25,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070416993] [2022-07-12 06:32:25,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070416993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:25,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:32:25,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:32:25,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876203810] [2022-07-12 06:32:25,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:25,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:32:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:32:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:25,178 INFO L87 Difference]: Start difference. First operand 152 states and 264 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:25,792 INFO L93 Difference]: Finished difference Result 553 states and 983 transitions. [2022-07-12 06:32:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:32:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:25,795 INFO L225 Difference]: With dead ends: 553 [2022-07-12 06:32:25,796 INFO L226 Difference]: Without dead ends: 404 [2022-07-12 06:32:25,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 06:32:25,798 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 465 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:25,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 762 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:32:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-07-12 06:32:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 182. [2022-07-12 06:32:25,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.7853107344632768) internal successors, (316), 178 states have internal predecessors, (316), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 322 transitions. [2022-07-12 06:32:25,811 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 322 transitions. Word has length 188 [2022-07-12 06:32:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:25,812 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 322 transitions. [2022-07-12 06:32:25,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 322 transitions. [2022-07-12 06:32:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:25,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:25,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:25,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 06:32:25,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1036829934, now seen corresponding path program 1 times [2022-07-12 06:32:25,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:25,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155100017] [2022-07-12 06:32:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:25,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-07-12 06:32:25,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155100017] [2022-07-12 06:32:25,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155100017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:25,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:32:25,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:32:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239387316] [2022-07-12 06:32:25,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:25,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:32:25,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:32:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:25,973 INFO L87 Difference]: Start difference. First operand 182 states and 322 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:26,463 INFO L93 Difference]: Finished difference Result 671 states and 1209 transitions. [2022-07-12 06:32:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:32:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:26,466 INFO L225 Difference]: With dead ends: 671 [2022-07-12 06:32:26,467 INFO L226 Difference]: Without dead ends: 492 [2022-07-12 06:32:26,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 06:32:26,469 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 465 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:26,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 759 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:32:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-07-12 06:32:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 226. [2022-07-12 06:32:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.8099547511312217) internal successors, (400), 222 states have internal predecessors, (400), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 406 transitions. [2022-07-12 06:32:26,478 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 406 transitions. Word has length 188 [2022-07-12 06:32:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:26,479 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 406 transitions. [2022-07-12 06:32:26,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 406 transitions. [2022-07-12 06:32:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:26,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:26,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:26,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 06:32:26,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash -59773682, now seen corresponding path program 1 times [2022-07-12 06:32:26,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:26,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330209661] [2022-07-12 06:32:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:26,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:26,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:26,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-07-12 06:32:26,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:26,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330209661] [2022-07-12 06:32:26,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330209661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:26,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:32:26,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:32:26,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201487348] [2022-07-12 06:32:26,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:26,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:32:26,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:32:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:26,604 INFO L87 Difference]: Start difference. First operand 226 states and 406 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:27,194 INFO L93 Difference]: Finished difference Result 1035 states and 1879 transitions. [2022-07-12 06:32:27,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 06:32:27,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:27,198 INFO L225 Difference]: With dead ends: 1035 [2022-07-12 06:32:27,198 INFO L226 Difference]: Without dead ends: 812 [2022-07-12 06:32:27,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 06:32:27,201 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 784 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:27,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 753 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:32:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-07-12 06:32:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 350. [2022-07-12 06:32:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.8318840579710145) internal successors, (632), 346 states have internal predecessors, (632), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 638 transitions. [2022-07-12 06:32:27,213 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 638 transitions. Word has length 188 [2022-07-12 06:32:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:27,214 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 638 transitions. [2022-07-12 06:32:27,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 638 transitions. [2022-07-12 06:32:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:27,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:27,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:27,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 06:32:27,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2092644362, now seen corresponding path program 1 times [2022-07-12 06:32:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:27,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264258806] [2022-07-12 06:32:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:27,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:27,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-07-12 06:32:27,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:27,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264258806] [2022-07-12 06:32:27,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264258806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:27,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:32:27,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:32:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828781198] [2022-07-12 06:32:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:27,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:32:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:32:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:27,330 INFO L87 Difference]: Start difference. First operand 350 states and 638 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:27,943 INFO L93 Difference]: Finished difference Result 1267 states and 2337 transitions. [2022-07-12 06:32:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:32:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:27,948 INFO L225 Difference]: With dead ends: 1267 [2022-07-12 06:32:27,949 INFO L226 Difference]: Without dead ends: 920 [2022-07-12 06:32:27,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 06:32:27,952 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 823 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:27,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 543 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:32:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-07-12 06:32:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 440. [2022-07-12 06:32:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6735632183908047) internal successors, (728), 436 states have internal predecessors, (728), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 734 transitions. [2022-07-12 06:32:27,967 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 734 transitions. Word has length 188 [2022-07-12 06:32:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:27,967 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 734 transitions. [2022-07-12 06:32:27,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 734 transitions. [2022-07-12 06:32:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:27,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:27,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:27,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 06:32:27,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:27,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1371492218, now seen corresponding path program 1 times [2022-07-12 06:32:27,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:27,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775150201] [2022-07-12 06:32:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:27,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:28,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:28,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:32:28,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:28,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775150201] [2022-07-12 06:32:28,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775150201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:28,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547035039] [2022-07-12 06:32:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:28,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:28,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:28,097 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) [2022-07-12 06:32:28,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 06:32:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:28,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-12 06:32:28,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:28,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547035039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:28,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:28,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 06:32:28,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740208220] [2022-07-12 06:32:28,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:28,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:28,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:28,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:28,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:28,313 INFO L87 Difference]: Start difference. First operand 440 states and 734 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:28,326 INFO L93 Difference]: Finished difference Result 877 states and 1467 transitions. [2022-07-12 06:32:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:28,329 INFO L225 Difference]: With dead ends: 877 [2022-07-12 06:32:28,343 INFO L226 Difference]: Without dead ends: 440 [2022-07-12 06:32:28,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:28,346 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:28,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-12 06:32:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-07-12 06:32:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6689655172413793) internal successors, (726), 436 states have internal predecessors, (726), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 732 transitions. [2022-07-12 06:32:28,357 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 732 transitions. Word has length 188 [2022-07-12 06:32:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:28,357 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 732 transitions. [2022-07-12 06:32:28,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 732 transitions. [2022-07-12 06:32:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:28,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:28,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:28,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:28,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 06:32:28,579 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash 412512002, now seen corresponding path program 1 times [2022-07-12 06:32:28,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:28,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169029777] [2022-07-12 06:32:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:28,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:28,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:28,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:32:28,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:28,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169029777] [2022-07-12 06:32:28,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169029777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:28,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347136700] [2022-07-12 06:32:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:28,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:28,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:28,700 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) [2022-07-12 06:32:28,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 06:32:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:28,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:28,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-12 06:32:28,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:28,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347136700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:28,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:28,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 06:32:28,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315909290] [2022-07-12 06:32:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:28,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:28,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:28,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:28,876 INFO L87 Difference]: Start difference. First operand 440 states and 732 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:28,888 INFO L93 Difference]: Finished difference Result 877 states and 1463 transitions. [2022-07-12 06:32:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:28,890 INFO L225 Difference]: With dead ends: 877 [2022-07-12 06:32:28,890 INFO L226 Difference]: Without dead ends: 440 [2022-07-12 06:32:28,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:28,893 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:28,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 261 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-12 06:32:28,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-07-12 06:32:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.664367816091954) internal successors, (724), 436 states have internal predecessors, (724), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 730 transitions. [2022-07-12 06:32:28,905 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 730 transitions. Word has length 188 [2022-07-12 06:32:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:28,905 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 730 transitions. [2022-07-12 06:32:28,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 730 transitions. [2022-07-12 06:32:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:28,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:28,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:28,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:29,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-12 06:32:29,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash -117932026, now seen corresponding path program 1 times [2022-07-12 06:32:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:29,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683683757] [2022-07-12 06:32:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:29,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:29,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:32:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683683757] [2022-07-12 06:32:29,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683683757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:29,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529969814] [2022-07-12 06:32:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:29,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:29,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:29,240 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) [2022-07-12 06:32:29,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 06:32:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:29,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:29,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-12 06:32:29,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:29,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529969814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:29,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:29,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 06:32:29,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983889694] [2022-07-12 06:32:29,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:29,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:29,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:29,425 INFO L87 Difference]: Start difference. First operand 440 states and 730 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:29,456 INFO L93 Difference]: Finished difference Result 877 states and 1459 transitions. [2022-07-12 06:32:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:29,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:29,458 INFO L225 Difference]: With dead ends: 877 [2022-07-12 06:32:29,458 INFO L226 Difference]: Without dead ends: 440 [2022-07-12 06:32:29,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:29,461 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:29,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-12 06:32:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-07-12 06:32:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6597701149425288) internal successors, (722), 436 states have internal predecessors, (722), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 728 transitions. [2022-07-12 06:32:29,471 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 728 transitions. Word has length 188 [2022-07-12 06:32:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:29,472 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 728 transitions. [2022-07-12 06:32:29,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 728 transitions. [2022-07-12 06:32:29,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:29,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:29,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:29,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:29,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:29,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash 618172290, now seen corresponding path program 1 times [2022-07-12 06:32:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:29,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164133522] [2022-07-12 06:32:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:29,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:29,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:32:29,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:29,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164133522] [2022-07-12 06:32:29,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164133522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408270864] [2022-07-12 06:32:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:29,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:29,821 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) [2022-07-12 06:32:29,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 06:32:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:29,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-12 06:32:29,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:29,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408270864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:29,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:29,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 06:32:29,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654493968] [2022-07-12 06:32:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:29,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:29,979 INFO L87 Difference]: Start difference. First operand 440 states and 728 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:29,991 INFO L93 Difference]: Finished difference Result 877 states and 1455 transitions. [2022-07-12 06:32:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:29,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:29,994 INFO L225 Difference]: With dead ends: 877 [2022-07-12 06:32:29,994 INFO L226 Difference]: Without dead ends: 440 [2022-07-12 06:32:29,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:29,997 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:29,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 259 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-12 06:32:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-07-12 06:32:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6551724137931034) internal successors, (720), 436 states have internal predecessors, (720), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 06:32:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 726 transitions. [2022-07-12 06:32:30,008 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 726 transitions. Word has length 188 [2022-07-12 06:32:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:30,009 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 726 transitions. [2022-07-12 06:32:30,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 726 transitions. [2022-07-12 06:32:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:30,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:30,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:30,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:30,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:30,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:30,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1962569606, now seen corresponding path program 1 times [2022-07-12 06:32:30,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:30,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815145183] [2022-07-12 06:32:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:30,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:30,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:30,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 06:32:30,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:30,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815145183] [2022-07-12 06:32:30,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815145183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:30,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956540303] [2022-07-12 06:32:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:30,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:30,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:30,367 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) [2022-07-12 06:32:30,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 06:32:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:30,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:30,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 06:32:30,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:30,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956540303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:30,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:30,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-12 06:32:30,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852301054] [2022-07-12 06:32:30,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:30,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:30,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:30,583 INFO L87 Difference]: Start difference. First operand 440 states and 726 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:30,626 INFO L93 Difference]: Finished difference Result 1314 states and 2180 transitions. [2022-07-12 06:32:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:30,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:30,630 INFO L225 Difference]: With dead ends: 1314 [2022-07-12 06:32:30,631 INFO L226 Difference]: Without dead ends: 877 [2022-07-12 06:32:30,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:30,635 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:30,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-07-12 06:32:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 875. [2022-07-12 06:32:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 867 states have (on average 1.6262975778546713) internal successors, (1410), 868 states have internal predecessors, (1410), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 06:32:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1425 transitions. [2022-07-12 06:32:30,658 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1425 transitions. Word has length 188 [2022-07-12 06:32:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:30,659 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1425 transitions. [2022-07-12 06:32:30,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1425 transitions. [2022-07-12 06:32:30,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:30,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:30,663 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:30,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:30,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 06:32:30,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash -235127422, now seen corresponding path program 1 times [2022-07-12 06:32:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20825376] [2022-07-12 06:32:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:30,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:30,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:30,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 06:32:31,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:31,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20825376] [2022-07-12 06:32:31,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20825376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:31,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082000013] [2022-07-12 06:32:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:31,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:31,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:31,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:31,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 06:32:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 06:32:31,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:31,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082000013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:31,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:31,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-12 06:32:31,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137415496] [2022-07-12 06:32:31,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:31,202 INFO L87 Difference]: Start difference. First operand 875 states and 1425 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:31,244 INFO L93 Difference]: Finished difference Result 2401 states and 3973 transitions. [2022-07-12 06:32:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:31,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:31,254 INFO L225 Difference]: With dead ends: 2401 [2022-07-12 06:32:31,254 INFO L226 Difference]: Without dead ends: 1529 [2022-07-12 06:32:31,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:31,264 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:31,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-07-12 06:32:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2022-07-12 06:32:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1513 states have (on average 1.6252478519497686) internal successors, (2459), 1514 states have internal predecessors, (2459), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (36), 8 states have call predecessors, (36), 9 states have call successors, (36) [2022-07-12 06:32:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2504 transitions. [2022-07-12 06:32:31,305 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2504 transitions. Word has length 188 [2022-07-12 06:32:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:31,306 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 2504 transitions. [2022-07-12 06:32:31,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2504 transitions. [2022-07-12 06:32:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:31,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:31,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:31,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:31,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:31,533 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash -415896190, now seen corresponding path program 1 times [2022-07-12 06:32:31,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:31,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651971018] [2022-07-12 06:32:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:31,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:31,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:31,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 06:32:31,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:31,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651971018] [2022-07-12 06:32:31,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651971018] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:31,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162381554] [2022-07-12 06:32:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:31,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:31,681 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:31,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 06:32:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:31,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-12 06:32:31,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162381554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:31,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:31,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-12 06:32:31,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459917754] [2022-07-12 06:32:31,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:31,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:31,847 INFO L87 Difference]: Start difference. First operand 1527 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:31,921 INFO L93 Difference]: Finished difference Result 4575 states and 7634 transitions. [2022-07-12 06:32:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:31,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:31,945 INFO L225 Difference]: With dead ends: 4575 [2022-07-12 06:32:31,946 INFO L226 Difference]: Without dead ends: 3051 [2022-07-12 06:32:31,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:31,971 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:31,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2022-07-12 06:32:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3049. [2022-07-12 06:32:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 3023 states have (on average 1.6040357260999007) internal successors, (4849), 3024 states have internal predecessors, (4849), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (136), 16 states have call predecessors, (136), 17 states have call successors, (136) [2022-07-12 06:32:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 5002 transitions. [2022-07-12 06:32:32,100 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 5002 transitions. Word has length 188 [2022-07-12 06:32:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:32,100 INFO L495 AbstractCegarLoop]: Abstraction has 3049 states and 5002 transitions. [2022-07-12 06:32:32,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 5002 transitions. [2022-07-12 06:32:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:32,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:32,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:32,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:32,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:32,342 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1945748094, now seen corresponding path program 1 times [2022-07-12 06:32:32,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:32,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632243263] [2022-07-12 06:32:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:32,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:32,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:32,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 06:32:32,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:32,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632243263] [2022-07-12 06:32:32,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632243263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:32,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033898847] [2022-07-12 06:32:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:32,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:32,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:32,488 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:32,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 06:32:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:32,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:32,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 06:32:32,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:32,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033898847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:32,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:32,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 06:32:32,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017646468] [2022-07-12 06:32:32,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:32,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:32,656 INFO L87 Difference]: Start difference. First operand 3049 states and 5002 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:32,898 INFO L93 Difference]: Finished difference Result 9141 states and 15512 transitions. [2022-07-12 06:32:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:32,966 INFO L225 Difference]: With dead ends: 9141 [2022-07-12 06:32:32,966 INFO L226 Difference]: Without dead ends: 6095 [2022-07-12 06:32:33,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:32:33,058 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 212 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:33,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2022-07-12 06:32:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 6093. [2022-07-12 06:32:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6093 states, 6043 states have (on average 1.582492139665729) internal successors, (9563), 6044 states have internal predecessors, (9563), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (528), 32 states have call predecessors, (528), 33 states have call successors, (528) [2022-07-12 06:32:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6093 states to 6093 states and 10124 transitions. [2022-07-12 06:32:33,307 INFO L78 Accepts]: Start accepts. Automaton has 6093 states and 10124 transitions. Word has length 188 [2022-07-12 06:32:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 6093 states and 10124 transitions. [2022-07-12 06:32:33,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6093 states and 10124 transitions. [2022-07-12 06:32:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:33,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:33,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:33,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:33,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 06:32:33,587 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 307905662, now seen corresponding path program 1 times [2022-07-12 06:32:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:33,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248020290] [2022-07-12 06:32:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:33,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:33,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:33,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 06:32:33,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:33,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248020290] [2022-07-12 06:32:33,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248020290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:33,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476358482] [2022-07-12 06:32:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:33,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:33,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:33,714 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:33,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 06:32:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:33,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:33,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 06:32:33,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:33,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476358482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:33,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:33,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-12 06:32:33,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439319184] [2022-07-12 06:32:33,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:33,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:33,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:33,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:33,903 INFO L87 Difference]: Start difference. First operand 6093 states and 10124 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:34,532 INFO L93 Difference]: Finished difference Result 18273 states and 32414 transitions. [2022-07-12 06:32:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:34,713 INFO L225 Difference]: With dead ends: 18273 [2022-07-12 06:32:34,714 INFO L226 Difference]: Without dead ends: 12183 [2022-07-12 06:32:34,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:34,821 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:34,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12183 states. [2022-07-12 06:32:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12183 to 12181. [2022-07-12 06:32:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12083 states have (on average 1.560787883803691) internal successors, (18859), 12084 states have internal predecessors, (18859), 65 states have call successors, (65), 32 states have call predecessors, (65), 32 states have return successors, (2080), 64 states have call predecessors, (2080), 65 states have call successors, (2080) [2022-07-12 06:32:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 21004 transitions. [2022-07-12 06:32:35,516 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 21004 transitions. Word has length 188 [2022-07-12 06:32:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:35,516 INFO L495 AbstractCegarLoop]: Abstraction has 12181 states and 21004 transitions. [2022-07-12 06:32:35,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 21004 transitions. [2022-07-12 06:32:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:35,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:35,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:35,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:36,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 06:32:36,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash -342727814, now seen corresponding path program 1 times [2022-07-12 06:32:36,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:36,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994334661] [2022-07-12 06:32:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:36,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:36,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:36,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-12 06:32:36,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:36,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994334661] [2022-07-12 06:32:36,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994334661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:36,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823687929] [2022-07-12 06:32:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:36,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:36,195 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:36,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 06:32:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 06:32:36,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823687929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:36,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:36,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-12 06:32:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347026432] [2022-07-12 06:32:36,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:36,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:36,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:36,353 INFO L87 Difference]: Start difference. First operand 12181 states and 21004 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:38,649 INFO L93 Difference]: Finished difference Result 36537 states and 71198 transitions. [2022-07-12 06:32:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:39,220 INFO L225 Difference]: With dead ends: 36537 [2022-07-12 06:32:39,221 INFO L226 Difference]: Without dead ends: 24359 [2022-07-12 06:32:39,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:39,731 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:39,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24359 states. [2022-07-12 06:32:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24359 to 24357. [2022-07-12 06:32:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24357 states, 24163 states have (on average 1.5390059181393039) internal successors, (37187), 24164 states have internal predecessors, (37187), 129 states have call successors, (129), 64 states have call predecessors, (129), 64 states have return successors, (8256), 128 states have call predecessors, (8256), 129 states have call successors, (8256) [2022-07-12 06:32:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24357 states to 24357 states and 45572 transitions. [2022-07-12 06:32:41,645 INFO L78 Accepts]: Start accepts. Automaton has 24357 states and 45572 transitions. Word has length 188 [2022-07-12 06:32:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:41,647 INFO L495 AbstractCegarLoop]: Abstraction has 24357 states and 45572 transitions. [2022-07-12 06:32:41,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 24357 states and 45572 transitions. [2022-07-12 06:32:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:32:42,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:42,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:42,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-12 06:32:42,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 06:32:42,819 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:42,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1629754234, now seen corresponding path program 1 times [2022-07-12 06:32:42,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:42,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761309864] [2022-07-12 06:32:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:42,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:42,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:42,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:32:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 06:32:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:42,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761309864] [2022-07-12 06:32:42,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761309864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:42,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781918646] [2022-07-12 06:32:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:42,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:42,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:42,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:42,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 06:32:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:32:43,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 06:32:43,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:32:43,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781918646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:32:43,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:32:43,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-12 06:32:43,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330639418] [2022-07-12 06:32:43,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:32:43,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:32:43,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:43,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:32:43,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:43,142 INFO L87 Difference]: Start difference. First operand 24357 states and 45572 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:32:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:50,446 INFO L93 Difference]: Finished difference Result 73065 states and 169478 transitions. [2022-07-12 06:32:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:32:50,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-07-12 06:32:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:52,571 INFO L225 Difference]: With dead ends: 73065 [2022-07-12 06:32:52,571 INFO L226 Difference]: Without dead ends: 48711 [2022-07-12 06:32:54,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:32:54,494 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:54,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:32:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48711 states. [2022-07-12 06:32:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48711 to 48709. [2022-07-12 06:32:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48709 states, 48323 states have (on average 1.5171864329615297) internal successors, (73315), 48324 states have internal predecessors, (73315), 257 states have call successors, (257), 128 states have call predecessors, (257), 128 states have return successors, (32896), 256 states have call predecessors, (32896), 257 states have call successors, (32896) [2022-07-12 06:33:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48709 states to 48709 states and 106468 transitions. [2022-07-12 06:33:00,736 INFO L78 Accepts]: Start accepts. Automaton has 48709 states and 106468 transitions. Word has length 188 [2022-07-12 06:33:00,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:33:00,737 INFO L495 AbstractCegarLoop]: Abstraction has 48709 states and 106468 transitions. [2022-07-12 06:33:00,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:33:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 48709 states and 106468 transitions. [2022-07-12 06:33:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 06:33:05,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:33:05,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:33:05,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 06:33:05,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 06:33:05,843 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:33:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:33:05,843 INFO L85 PathProgramCache]: Analyzing trace with hash 446456698, now seen corresponding path program 1 times [2022-07-12 06:33:05,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:33:05,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771950816] [2022-07-12 06:33:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:33:05,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:33:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:33:05,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:33:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:33:05,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-12 06:33:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:33:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 06:33:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:33:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771950816] [2022-07-12 06:33:05,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771950816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:33:05,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756878648] [2022-07-12 06:33:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:33:05,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:33:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:33:05,972 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:33:05,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 06:33:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:33:06,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 06:33:06,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:33:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 06:33:06,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 06:33:06,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756878648] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:33:06,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 06:33:06,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-12 06:33:06,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761969742] [2022-07-12 06:33:06,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:33:06,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:33:06,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:33:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:33:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:33:06,102 INFO L87 Difference]: Start difference. First operand 48709 states and 106468 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)