./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/recursive/EvenOdd01-1.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 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:36:40,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:36:40,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:36:40,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:36:40,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:36:40,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:36:40,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:36:40,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:36:40,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:36:40,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:36:41,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:36:41,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:36:41,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:36:41,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:36:41,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:36:41,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:36:41,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:36:41,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:36:41,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:36:41,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:36:41,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:36:41,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:36:41,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:36:41,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:36:41,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:36:41,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:36:41,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:36:41,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:36:41,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:36:41,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:36:41,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:36:41,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:36:41,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:36:41,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:36:41,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:36:41,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:36:41,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:36:41,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:36:41,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:36:41,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:36:41,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:36:41,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 12:36:41,063 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:36:41,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:36:41,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:36:41,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:36:41,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:36:41,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:36:41,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:36:41,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:36:41,068 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:36:41,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:36:41,068 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:36:41,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:36:41,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:36:41,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:36:41,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 12:36:41,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:36:41,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 12:36:41,070 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:36:41,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 12:36:41,070 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:36:41,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 12:36:41,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:36:41,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:36:41,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:36:41,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:36:41,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:36:41,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:36:41,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 12:36:41,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:36:41,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:36:41,072 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:36:41,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 12:36:41,073 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:36:41,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:36:41,073 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:36:41,073 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2023-02-15 12:36:41,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:36:41,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:36:41,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:36:41,325 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:36:41,325 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:36:41,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-02-15 12:36:42,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:36:42,580 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:36:42,581 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-02-15 12:36:42,586 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d933a8f3/1ab5d421abd141b8868416e7a5e0c403/FLAGf807514fa [2023-02-15 12:36:42,600 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d933a8f3/1ab5d421abd141b8868416e7a5e0c403 [2023-02-15 12:36:42,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:36:42,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:36:42,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:36:42,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:36:42,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:36:42,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40751df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42, skipping insertion in model container [2023-02-15 12:36:42,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:36:42,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:36:42,739 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2023-02-15 12:36:42,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:36:42,751 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:36:42,762 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2023-02-15 12:36:42,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:36:42,773 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:36:42,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42 WrapperNode [2023-02-15 12:36:42,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:36:42,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:36:42,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:36:42,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:36:42,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,799 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-02-15 12:36:42,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:36:42,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:36:42,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:36:42,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:36:42,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:36:42,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:36:42,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:36:42,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:36:42,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (1/1) ... [2023-02-15 12:36:42,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:36:42,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:42,853 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) [2023-02-15 12:36:42,856 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 [2023-02-15 12:36:42,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:36:42,883 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-02-15 12:36:42,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-02-15 12:36:42,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:36:42,884 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-02-15 12:36:42,885 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-02-15 12:36:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:36:42,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:36:42,938 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:36:42,940 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:36:43,072 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:36:43,077 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:36:43,077 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 12:36:43,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:36:43 BoogieIcfgContainer [2023-02-15 12:36:43,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:36:43,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:36:43,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:36:43,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:36:43,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:36:42" (1/3) ... [2023-02-15 12:36:43,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8c9c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:36:43, skipping insertion in model container [2023-02-15 12:36:43,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:42" (2/3) ... [2023-02-15 12:36:43,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8c9c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:36:43, skipping insertion in model container [2023-02-15 12:36:43,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:36:43" (3/3) ... [2023-02-15 12:36:43,086 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2023-02-15 12:36:43,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:36:43,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 12:36:43,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:36:43,163 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@88fefa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:36:43,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 12:36:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 12:36:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 12:36:43,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:43,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:43,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2023-02-15 12:36:43,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608932681] [2023-02-15 12:36:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:43,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:43,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:36:43,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:43,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608932681] [2023-02-15 12:36:43,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608932681] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:43,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:43,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 12:36:43,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757078326] [2023-02-15 12:36:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:43,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 12:36:43,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 12:36:43,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:36:43,941 INFO L87 Difference]: Start difference. First operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 12:36:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:44,051 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-02-15 12:36:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:36:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-02-15 12:36:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:44,061 INFO L225 Difference]: With dead ends: 37 [2023-02-15 12:36:44,061 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 12:36:44,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:36:44,069 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:44,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 97 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:36:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 12:36:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-15 12:36:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 12:36:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 12:36:44,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2023-02-15 12:36:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:44,111 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 12:36:44,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 12:36:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 12:36:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 12:36:44,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:44,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:44,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:36:44,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:44,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2023-02-15 12:36:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:44,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443298104] [2023-02-15 12:36:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:44,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:44,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:36:44,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:44,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443298104] [2023-02-15 12:36:44,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443298104] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:44,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:44,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 12:36:44,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672909597] [2023-02-15 12:36:44,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:44,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 12:36:44,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 12:36:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:36:44,514 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 12:36:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:44,593 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-02-15 12:36:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:36:44,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-15 12:36:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:44,595 INFO L225 Difference]: With dead ends: 30 [2023-02-15 12:36:44,595 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 12:36:44,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 12:36:44,601 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:44,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:36:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 12:36:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-02-15 12:36:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 12:36:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 12:36:44,610 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2023-02-15 12:36:44,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:44,611 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 12:36:44,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 12:36:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 12:36:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 12:36:44,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:44,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:44,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 12:36:44,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:44,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2023-02-15 12:36:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88361739] [2023-02-15 12:36:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:44,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:44,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:36:44,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:44,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88361739] [2023-02-15 12:36:44,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88361739] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:44,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:44,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:36:44,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133238153] [2023-02-15 12:36:44,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:44,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:36:44,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:44,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:36:44,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:36:44,729 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:36:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:44,754 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-02-15 12:36:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:36:44,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-15 12:36:44,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:44,755 INFO L225 Difference]: With dead ends: 38 [2023-02-15 12:36:44,755 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 12:36:44,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:36:44,762 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:44,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:36:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 12:36:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-02-15 12:36:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 12:36:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-15 12:36:44,774 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2023-02-15 12:36:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:44,775 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-15 12:36:44,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:36:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-15 12:36:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 12:36:44,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:44,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:44,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 12:36:44,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2023-02-15 12:36:44,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:44,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143856355] [2023-02-15 12:36:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:44,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:44,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:36:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143856355] [2023-02-15 12:36:45,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143856355] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:45,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:45,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 12:36:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528865411] [2023-02-15 12:36:45,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:45,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 12:36:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 12:36:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:36:45,081 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:36:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:45,181 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-02-15 12:36:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 12:36:45,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-15 12:36:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:45,183 INFO L225 Difference]: With dead ends: 33 [2023-02-15 12:36:45,183 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 12:36:45,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:36:45,184 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:45,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 76 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:36:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 12:36:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-02-15 12:36:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 12:36:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-15 12:36:45,188 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2023-02-15 12:36:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:45,189 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-15 12:36:45,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:36:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-15 12:36:45,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 12:36:45,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:45,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:45,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 12:36:45,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:45,191 INFO L85 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2023-02-15 12:36:45,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740264925] [2023-02-15 12:36:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:45,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:36:45,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:45,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740264925] [2023-02-15 12:36:45,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740264925] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:45,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:45,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:36:45,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169552887] [2023-02-15 12:36:45,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:45,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:36:45,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:36:45,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:36:45,268 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 12:36:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:45,291 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-15 12:36:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:36:45,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-02-15 12:36:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:45,293 INFO L225 Difference]: With dead ends: 39 [2023-02-15 12:36:45,293 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 12:36:45,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:36:45,294 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:45,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:36:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 12:36:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-15 12:36:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 12:36:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-15 12:36:45,299 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2023-02-15 12:36:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:45,299 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-15 12:36:45,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 12:36:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-15 12:36:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 12:36:45,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:45,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 12:36:45,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2023-02-15 12:36:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:45,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364206425] [2023-02-15 12:36:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:36:45,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:45,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364206425] [2023-02-15 12:36:45,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364206425] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320493752] [2023-02-15 12:36:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:45,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:45,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:45,671 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) [2023-02-15 12:36:45,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:36:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 12:36:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 12:36:45,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:36:46,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320493752] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:46,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:46,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2023-02-15 12:36:46,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002073377] [2023-02-15 12:36:46,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:46,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 12:36:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 12:36:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-02-15 12:36:46,525 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 12:36:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:46,729 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-02-15 12:36:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:36:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 26 [2023-02-15 12:36:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:46,731 INFO L225 Difference]: With dead ends: 39 [2023-02-15 12:36:46,731 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 12:36:46,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-02-15 12:36:46,733 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:46,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 146 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:36:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 12:36:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-02-15 12:36:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:36:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-02-15 12:36:46,745 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2023-02-15 12:36:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:46,746 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-02-15 12:36:46,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 12:36:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-02-15 12:36:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 12:36:46,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:46,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:46,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:46,948 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 [2023-02-15 12:36:46,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2023-02-15 12:36:46,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:46,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528314846] [2023-02-15 12:36:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:47,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:47,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:47,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:47,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 12:36:47,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:47,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528314846] [2023-02-15 12:36:47,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528314846] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:47,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537233468] [2023-02-15 12:36:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:47,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:47,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:47,348 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) [2023-02-15 12:36:47,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:36:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:47,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 12:36:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:36:47,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:36:48,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537233468] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:48,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:48,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 24 [2023-02-15 12:36:48,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121312709] [2023-02-15 12:36:48,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:48,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 12:36:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 12:36:48,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-02-15 12:36:48,173 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-15 12:36:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:48,528 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-02-15 12:36:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 12:36:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 33 [2023-02-15 12:36:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:48,530 INFO L225 Difference]: With dead ends: 45 [2023-02-15 12:36:48,530 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 12:36:48,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 12:36:48,531 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:48,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 196 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:36:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 12:36:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-02-15 12:36:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 12:36:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-15 12:36:48,535 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2023-02-15 12:36:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:48,535 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-15 12:36:48,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-15 12:36:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-15 12:36:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 12:36:48,538 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:48,538 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:48,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:48,743 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 [2023-02-15 12:36:48,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2023-02-15 12:36:48,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:48,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570764411] [2023-02-15 12:36:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:48,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:49,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:49,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:49,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:49,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:36:49,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:49,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570764411] [2023-02-15 12:36:49,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570764411] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:49,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851041085] [2023-02-15 12:36:49,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:36:49,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:49,257 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) [2023-02-15 12:36:49,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:36:49,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:36:49,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:49,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 12:36:49,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 12:36:49,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:36:50,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851041085] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:50,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:50,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 28 [2023-02-15 12:36:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22895853] [2023-02-15 12:36:50,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 12:36:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 12:36:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-02-15 12:36:50,295 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 12:36:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:50,612 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-15 12:36:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 12:36:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2023-02-15 12:36:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:50,614 INFO L225 Difference]: With dead ends: 51 [2023-02-15 12:36:50,614 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 12:36:50,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 12:36:50,616 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:50,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 183 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:36:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 12:36:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2023-02-15 12:36:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 12:36:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-02-15 12:36:50,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2023-02-15 12:36:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:50,621 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-02-15 12:36:50,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 12:36:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-02-15 12:36:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 12:36:50,622 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:50,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:50,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 12:36:50,827 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 [2023-02-15 12:36:50,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:50,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2023-02-15 12:36:50,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:50,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102202914] [2023-02-15 12:36:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:50,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:51,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:51,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:51,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 12:36:51,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102202914] [2023-02-15 12:36:51,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102202914] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131765444] [2023-02-15 12:36:51,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:36:51,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:51,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:51,387 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) [2023-02-15 12:36:51,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:36:51,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:36:51,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 12:36:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 12:36:51,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:36:52,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131765444] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:52,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:52,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 31 [2023-02-15 12:36:52,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339957330] [2023-02-15 12:36:52,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:52,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 12:36:52,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 12:36:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-02-15 12:36:52,574 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2023-02-15 12:36:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:52,990 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2023-02-15 12:36:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 12:36:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) Word has length 47 [2023-02-15 12:36:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:52,992 INFO L225 Difference]: With dead ends: 57 [2023-02-15 12:36:52,992 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 12:36:52,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 12:36:52,993 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:52,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 220 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:36:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 12:36:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2023-02-15 12:36:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-15 12:36:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-02-15 12:36:52,998 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2023-02-15 12:36:52,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:52,999 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-02-15 12:36:52,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2023-02-15 12:36:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-02-15 12:36:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 12:36:53,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:53,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:53,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:53,205 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 [2023-02-15 12:36:53,206 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:53,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2023-02-15 12:36:53,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:53,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584399113] [2023-02-15 12:36:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:53,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 12:36:53,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:53,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584399113] [2023-02-15 12:36:53,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584399113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:53,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385432344] [2023-02-15 12:36:53,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:36:53,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:53,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:53,851 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) [2023-02-15 12:36:53,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:36:53,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 12:36:53,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:53,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 12:36:53,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 12:36:54,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:36:55,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385432344] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:55,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:55,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 24] total 34 [2023-02-15 12:36:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323167497] [2023-02-15 12:36:55,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:55,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 12:36:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:55,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 12:36:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 12:36:55,249 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-15 12:36:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:55,737 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2023-02-15 12:36:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:36:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 54 [2023-02-15 12:36:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:55,739 INFO L225 Difference]: With dead ends: 63 [2023-02-15 12:36:55,739 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 12:36:55,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 12:36:55,740 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:55,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 309 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:36:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 12:36:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2023-02-15 12:36:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-15 12:36:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-02-15 12:36:55,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2023-02-15 12:36:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:55,746 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-02-15 12:36:55,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-15 12:36:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-02-15 12:36:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 12:36:55,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:55,747 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:55,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:55,953 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 [2023-02-15 12:36:55,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2023-02-15 12:36:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:55,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434243909] [2023-02-15 12:36:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:55,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 12:36:56,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:56,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434243909] [2023-02-15 12:36:56,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434243909] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:56,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858709122] [2023-02-15 12:36:56,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:36:56,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:56,713 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) [2023-02-15 12:36:56,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:36:56,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 12:36:56,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-15 12:36:56,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 12:36:57,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:36:58,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858709122] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:58,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:58,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 27] total 36 [2023-02-15 12:36:58,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714900972] [2023-02-15 12:36:58,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:58,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 12:36:58,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 12:36:58,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 12:36:58,330 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-15 12:36:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:58,986 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2023-02-15 12:36:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 12:36:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2023-02-15 12:36:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:58,987 INFO L225 Difference]: With dead ends: 69 [2023-02-15 12:36:58,987 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 12:36:58,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 12:36:58,988 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:58,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 398 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:36:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 12:36:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2023-02-15 12:36:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 12:36:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-02-15 12:36:58,993 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2023-02-15 12:36:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:58,994 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-02-15 12:36:58,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-15 12:36:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-02-15 12:36:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 12:36:58,995 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:58,995 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:59,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:59,204 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 [2023-02-15 12:36:59,205 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2023-02-15 12:36:59,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:59,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998166344] [2023-02-15 12:36:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:00,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:00,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 12:37:00,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:00,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998166344] [2023-02-15 12:37:00,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998166344] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082153227] [2023-02-15 12:37:00,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:37:00,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:00,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:00,157 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) [2023-02-15 12:37:00,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:37:00,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:37:00,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:00,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-15 12:37:00,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 12:37:00,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:37:02,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082153227] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:02,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:02,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 30] total 40 [2023-02-15 12:37:02,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034842372] [2023-02-15 12:37:02,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:02,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 12:37:02,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 12:37:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 12:37:02,233 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-02-15 12:37:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:02,814 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2023-02-15 12:37:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 12:37:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) Word has length 68 [2023-02-15 12:37:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:02,816 INFO L225 Difference]: With dead ends: 75 [2023-02-15 12:37:02,816 INFO L226 Difference]: Without dead ends: 71 [2023-02-15 12:37:02,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 12:37:02,818 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:02,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 336 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:37:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-15 12:37:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2023-02-15 12:37:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 12:37:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-02-15 12:37:02,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2023-02-15 12:37:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:02,824 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-02-15 12:37:02,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-02-15 12:37:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-02-15 12:37:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-15 12:37:02,826 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:02,826 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:02,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:03,031 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 [2023-02-15 12:37:03,032 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2023-02-15 12:37:03,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:03,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867525824] [2023-02-15 12:37:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:03,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:03,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-02-15 12:37:04,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:04,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867525824] [2023-02-15 12:37:04,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867525824] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317699084] [2023-02-15 12:37:04,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:37:04,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:04,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:04,106 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) [2023-02-15 12:37:04,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:37:04,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:37:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-15 12:37:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 12:37:04,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 12:37:06,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317699084] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:06,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:06,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 33] total 42 [2023-02-15 12:37:06,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400992413] [2023-02-15 12:37:06,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:06,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 12:37:06,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:06,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 12:37:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:37:06,315 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 29 states have internal predecessors, (71), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2023-02-15 12:37:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:07,095 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2023-02-15 12:37:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 12:37:07,095 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 29 states have internal predecessors, (71), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) Word has length 75 [2023-02-15 12:37:07,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:07,096 INFO L225 Difference]: With dead ends: 81 [2023-02-15 12:37:07,096 INFO L226 Difference]: Without dead ends: 77 [2023-02-15 12:37:07,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=346, Invalid=3560, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 12:37:07,098 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:07,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 490 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:37:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-15 12:37:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2023-02-15 12:37:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2023-02-15 12:37:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-02-15 12:37:07,104 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2023-02-15 12:37:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:07,104 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-02-15 12:37:07,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 29 states have internal predecessors, (71), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2023-02-15 12:37:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-02-15 12:37:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 12:37:07,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:07,106 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:07,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:07,312 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 [2023-02-15 12:37:07,312 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2023-02-15 12:37:07,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:07,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770001504] [2023-02-15 12:37:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:07,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:07,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:07,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:07,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:07,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:08,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:08,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:08,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:08,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-02-15 12:37:08,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:08,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770001504] [2023-02-15 12:37:08,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770001504] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:08,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763885149] [2023-02-15 12:37:08,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:37:08,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:08,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:08,553 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) [2023-02-15 12:37:08,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 12:37:08,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 12:37:08,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-15 12:37:08,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-15 12:37:08,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 12:37:11,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763885149] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:11,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:11,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 36] total 46 [2023-02-15 12:37:11,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107203111] [2023-02-15 12:37:11,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:11,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 12:37:11,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 12:37:11,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1916, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 12:37:11,103 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 12:37:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:11,827 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2023-02-15 12:37:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 12:37:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) Word has length 82 [2023-02-15 12:37:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:11,829 INFO L225 Difference]: With dead ends: 87 [2023-02-15 12:37:11,829 INFO L226 Difference]: Without dead ends: 83 [2023-02-15 12:37:11,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=382, Invalid=4174, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 12:37:11,831 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:11,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 463 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:37:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-15 12:37:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2023-02-15 12:37:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 12:37:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-02-15 12:37:11,837 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2023-02-15 12:37:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:11,839 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-02-15 12:37:11,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 12:37:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-02-15 12:37:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-15 12:37:11,841 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:11,841 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:11,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:12,042 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 [2023-02-15 12:37:12,042 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2023-02-15 12:37:12,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:12,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074327258] [2023-02-15 12:37:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:12,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:12,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:12,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:12,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:12,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:12,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:12,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:12,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:13,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:13,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:13,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:13,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-15 12:37:13,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074327258] [2023-02-15 12:37:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074327258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259585443] [2023-02-15 12:37:13,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:37:13,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:13,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:13,421 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) [2023-02-15 12:37:13,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 12:37:13,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 12:37:13,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-15 12:37:13,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-15 12:37:13,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 12:37:16,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259585443] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:16,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:16,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 39] total 48 [2023-02-15 12:37:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128039392] [2023-02-15 12:37:16,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:16,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 12:37:16,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 12:37:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2097, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 12:37:16,143 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-02-15 12:37:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:16,935 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-02-15 12:37:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 12:37:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) Word has length 89 [2023-02-15 12:37:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:16,936 INFO L225 Difference]: With dead ends: 93 [2023-02-15 12:37:16,936 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 12:37:16,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 171 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 12:37:16,938 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:16,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 438 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:37:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 12:37:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2023-02-15 12:37:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-15 12:37:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2023-02-15 12:37:16,944 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2023-02-15 12:37:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:16,944 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2023-02-15 12:37:16,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-02-15 12:37:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2023-02-15 12:37:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 12:37:16,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:16,946 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:16,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:17,151 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 [2023-02-15 12:37:17,151 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2023-02-15 12:37:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:17,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945465331] [2023-02-15 12:37:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:17,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:17,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:17,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:17,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:17,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 12:37:18,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945465331] [2023-02-15 12:37:18,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945465331] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271566194] [2023-02-15 12:37:18,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:37:18,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:18,759 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) [2023-02-15 12:37:18,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 12:37:18,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 12:37:18,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:18,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-15 12:37:18,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-15 12:37:19,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 12:37:21,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271566194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:21,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:21,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 42] total 52 [2023-02-15 12:37:21,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057077802] [2023-02-15 12:37:21,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:21,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 12:37:21,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:21,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 12:37:21,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2476, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 12:37:21,911 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-02-15 12:37:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:22,889 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2023-02-15 12:37:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 12:37:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) Word has length 96 [2023-02-15 12:37:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:22,891 INFO L225 Difference]: With dead ends: 99 [2023-02-15 12:37:22,891 INFO L226 Difference]: Without dead ends: 95 [2023-02-15 12:37:22,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=471, Invalid=5535, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 12:37:22,893 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:22,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 614 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:37:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-15 12:37:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2023-02-15 12:37:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-15 12:37:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-02-15 12:37:22,906 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2023-02-15 12:37:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:22,907 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-02-15 12:37:22,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-02-15 12:37:22,907 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-02-15 12:37:22,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 12:37:22,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:22,908 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:22,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:23,114 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 [2023-02-15 12:37:23,114 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2023-02-15 12:37:23,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:23,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266509592] [2023-02-15 12:37:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:23,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-02-15 12:37:24,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266509592] [2023-02-15 12:37:24,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266509592] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997782946] [2023-02-15 12:37:24,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:37:24,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:24,857 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) [2023-02-15 12:37:24,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 12:37:24,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 12:37:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 120 conjunts are in the unsatisfiable core [2023-02-15 12:37:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-15 12:37:25,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 12:37:28,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997782946] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:28,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:28,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 45] total 54 [2023-02-15 12:37:28,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061391368] [2023-02-15 12:37:28,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:28,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 12:37:28,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 12:37:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2682, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 12:37:28,550 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-02-15 12:37:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:29,790 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2023-02-15 12:37:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 12:37:29,790 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) Word has length 103 [2023-02-15 12:37:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:29,791 INFO L225 Difference]: With dead ends: 105 [2023-02-15 12:37:29,791 INFO L226 Difference]: Without dead ends: 101 [2023-02-15 12:37:29,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=527, Invalid=6279, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 12:37:29,794 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:29,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 734 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 12:37:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-15 12:37:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2023-02-15 12:37:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2023-02-15 12:37:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-02-15 12:37:29,798 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2023-02-15 12:37:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:29,799 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-02-15 12:37:29,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-02-15 12:37:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-02-15 12:37:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-15 12:37:29,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:29,800 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:29,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:30,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 12:37:30,006 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2023-02-15 12:37:30,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:30,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884415579] [2023-02-15 12:37:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:30,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:30,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:30,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:30,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:30,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-15 12:37:31,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884415579] [2023-02-15 12:37:31,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884415579] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794982889] [2023-02-15 12:37:31,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:37:31,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:31,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:31,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:31,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 12:37:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-15 12:37:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-02-15 12:37:32,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 12:37:35,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794982889] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:35,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:35,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 48] total 58 [2023-02-15 12:37:35,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568699477] [2023-02-15 12:37:35,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:35,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 12:37:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 12:37:35,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3108, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 12:37:35,909 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-02-15 12:37:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:37,102 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2023-02-15 12:37:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 12:37:37,102 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 110 [2023-02-15 12:37:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:37,103 INFO L225 Difference]: With dead ends: 111 [2023-02-15 12:37:37,103 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 12:37:37,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 211 SyntacticMatches, 16 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=568, Invalid=7088, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 12:37:37,105 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:37,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 730 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:37:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 12:37:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2023-02-15 12:37:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2023-02-15 12:37:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-02-15 12:37:37,110 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2023-02-15 12:37:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:37,110 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-02-15 12:37:37,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-02-15 12:37:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2023-02-15 12:37:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-15 12:37:37,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:37,112 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:37,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:37,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 12:37:37,321 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2023-02-15 12:37:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:37,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635284063] [2023-02-15 12:37:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:37,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:37,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:37,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:38,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:39,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:39,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:39,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:39,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:39,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-02-15 12:37:39,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:39,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635284063] [2023-02-15 12:37:39,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635284063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:39,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504978719] [2023-02-15 12:37:39,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:37:39,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:39,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:39,468 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:39,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 12:37:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:39,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 136 conjunts are in the unsatisfiable core [2023-02-15 12:37:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-02-15 12:37:39,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 12:37:43,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504978719] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:43,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:43,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 51] total 60 [2023-02-15 12:37:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271700990] [2023-02-15 12:37:43,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:43,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 12:37:43,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:43,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 12:37:43,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3337, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 12:37:43,732 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 60 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 41 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) [2023-02-15 12:37:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:45,022 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2023-02-15 12:37:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 12:37:45,023 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 41 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) Word has length 117 [2023-02-15 12:37:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:45,024 INFO L225 Difference]: With dead ends: 117 [2023-02-15 12:37:45,024 INFO L226 Difference]: Without dead ends: 113 [2023-02-15 12:37:45,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 227 SyntacticMatches, 16 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=631, Invalid=7925, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 12:37:45,026 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:45,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 725 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:37:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-15 12:37:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2023-02-15 12:37:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2023-02-15 12:37:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2023-02-15 12:37:45,030 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2023-02-15 12:37:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:45,030 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2023-02-15 12:37:45,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 41 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) [2023-02-15 12:37:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2023-02-15 12:37:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-15 12:37:45,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:45,032 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:45,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 12:37:45,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:45,241 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2023-02-15 12:37:45,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:45,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606603199] [2023-02-15 12:37:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:45,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:45,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:45,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:45,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:47,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:47,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:47,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-15 12:37:47,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606603199] [2023-02-15 12:37:47,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606603199] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972555548] [2023-02-15 12:37:47,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:37:47,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:47,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:47,252 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:47,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 12:37:47,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:37:47,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 144 conjunts are in the unsatisfiable core [2023-02-15 12:37:47,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-02-15 12:37:47,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 12:37:52,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972555548] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:52,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:52,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 54] total 64 [2023-02-15 12:37:52,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912250693] [2023-02-15 12:37:52,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:52,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 12:37:52,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 12:37:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3812, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 12:37:52,100 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-02-15 12:37:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:53,508 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2023-02-15 12:37:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 12:37:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) Word has length 124 [2023-02-15 12:37:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:53,509 INFO L225 Difference]: With dead ends: 123 [2023-02-15 12:37:53,509 INFO L226 Difference]: Without dead ends: 119 [2023-02-15 12:37:53,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 239 SyntacticMatches, 18 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=673, Invalid=8833, Unknown=0, NotChecked=0, Total=9506 [2023-02-15 12:37:53,510 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:53,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 884 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 12:37:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-15 12:37:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2023-02-15 12:37:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2023-02-15 12:37:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2023-02-15 12:37:53,515 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 124 [2023-02-15 12:37:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:53,515 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2023-02-15 12:37:53,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-02-15 12:37:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2023-02-15 12:37:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-15 12:37:53,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:37:53,517 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:37:53,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:53,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:53,723 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:37:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:37:53,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1519753334, now seen corresponding path program 8 times [2023-02-15 12:37:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:37:53,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551747094] [2023-02-15 12:37:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:37:53,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:37:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:53,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:54,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:54,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:54,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:54,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:54,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:54,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:37:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:37:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-15 12:37:55,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:37:55,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551747094] [2023-02-15 12:37:55,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551747094] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:37:55,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284125544] [2023-02-15 12:37:55,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:37:55,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:37:55,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:37:55,874 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:37:55,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 12:37:56,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:37:56,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:37:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 152 conjunts are in the unsatisfiable core [2023-02-15 12:37:56,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-02-15 12:37:56,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-15 12:38:01,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284125544] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:01,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:01,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 57] total 66 [2023-02-15 12:38:01,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629613424] [2023-02-15 12:38:01,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:01,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-15 12:38:01,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:01,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-15 12:38:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4066, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 12:38:01,012 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-02-15 12:38:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:02,649 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2023-02-15 12:38:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 12:38:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) Word has length 131 [2023-02-15 12:38:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:02,651 INFO L225 Difference]: With dead ends: 129 [2023-02-15 12:38:02,651 INFO L226 Difference]: Without dead ends: 125 [2023-02-15 12:38:02,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 256 SyntacticMatches, 17 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=741, Invalid=9765, Unknown=0, NotChecked=0, Total=10506 [2023-02-15 12:38:02,652 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:02,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 956 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 12:38:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-15 12:38:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2023-02-15 12:38:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2023-02-15 12:38:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2023-02-15 12:38:02,658 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 131 [2023-02-15 12:38:02,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:02,658 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2023-02-15 12:38:02,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-02-15 12:38:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2023-02-15 12:38:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-02-15 12:38:02,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:02,659 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:02,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:02,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:02,866 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash 128231176, now seen corresponding path program 9 times [2023-02-15 12:38:02,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:02,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846153763] [2023-02-15 12:38:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:02,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:03,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:03,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:03,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:03,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:03,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:04,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:05,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:05,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:05,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:05,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-02-15 12:38:05,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:05,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846153763] [2023-02-15 12:38:05,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846153763] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:05,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259739408] [2023-02-15 12:38:05,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:38:05,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:05,341 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:05,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 12:38:05,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-15 12:38:05,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:05,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 160 conjunts are in the unsatisfiable core [2023-02-15 12:38:05,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-02-15 12:38:05,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-15 12:38:11,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259739408] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:11,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:11,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 60] total 70 [2023-02-15 12:38:11,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005605770] [2023-02-15 12:38:11,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-15 12:38:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-15 12:38:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4588, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 12:38:11,021 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2023-02-15 12:38:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:12,654 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-02-15 12:38:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 12:38:12,656 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) Word has length 138 [2023-02-15 12:38:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:12,657 INFO L225 Difference]: With dead ends: 135 [2023-02-15 12:38:12,657 INFO L226 Difference]: Without dead ends: 131 [2023-02-15 12:38:12,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 267 SyntacticMatches, 20 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=786, Invalid=10770, Unknown=0, NotChecked=0, Total=11556 [2023-02-15 12:38:12,660 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 101 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:12,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 966 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 12:38:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-15 12:38:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2023-02-15 12:38:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2023-02-15 12:38:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2023-02-15 12:38:12,669 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 138 [2023-02-15 12:38:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:12,669 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2023-02-15 12:38:12,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2023-02-15 12:38:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2023-02-15 12:38:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-15 12:38:12,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:12,670 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:12,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 12:38:12,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:12,880 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash -219126640, now seen corresponding path program 9 times [2023-02-15 12:38:12,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:12,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884552090] [2023-02-15 12:38:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:12,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:13,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:13,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:13,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:13,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:13,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:14,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:14,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:14,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:14,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:14,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:14,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-02-15 12:38:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:15,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884552090] [2023-02-15 12:38:15,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884552090] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:15,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484682897] [2023-02-15 12:38:15,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:38:15,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:15,800 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:15,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 12:38:15,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-15 12:38:15,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:15,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 168 conjunts are in the unsatisfiable core [2023-02-15 12:38:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-02-15 12:38:16,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-02-15 12:38:21,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484682897] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:21,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:21,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 63] total 73 [2023-02-15 12:38:21,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662319785] [2023-02-15 12:38:21,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:21,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-15 12:38:21,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-15 12:38:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=5005, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 12:38:21,925 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 73 states, 71 states have (on average 1.7183098591549295) internal successors, (122), 50 states have internal predecessors, (122), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) [2023-02-15 12:38:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:23,780 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2023-02-15 12:38:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 12:38:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.7183098591549295) internal successors, (122), 50 states have internal predecessors, (122), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) Word has length 145 [2023-02-15 12:38:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:23,781 INFO L225 Difference]: With dead ends: 141 [2023-02-15 12:38:23,781 INFO L226 Difference]: Without dead ends: 137 [2023-02-15 12:38:23,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 283 SyntacticMatches, 19 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=866, Invalid=12016, Unknown=0, NotChecked=0, Total=12882 [2023-02-15 12:38:23,783 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:23,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1070 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2143 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 12:38:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-15 12:38:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2023-02-15 12:38:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2023-02-15 12:38:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2023-02-15 12:38:23,787 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 145 [2023-02-15 12:38:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:23,788 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2023-02-15 12:38:23,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.7183098591549295) internal successors, (122), 50 states have internal predecessors, (122), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) [2023-02-15 12:38:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2023-02-15 12:38:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-02-15 12:38:23,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:23,789 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:23,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 12:38:23,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:23,995 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:23,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:23,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1955824178, now seen corresponding path program 10 times [2023-02-15 12:38:23,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:23,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871787594] [2023-02-15 12:38:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:23,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:24,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:24,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:24,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:24,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:25,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:25,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:25,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:25,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:25,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:25,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:26,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-15 12:38:27,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:27,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871787594] [2023-02-15 12:38:27,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871787594] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:27,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425534832] [2023-02-15 12:38:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:38:27,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:27,090 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:27,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 12:38:27,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:38:27,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:27,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 176 conjunts are in the unsatisfiable core [2023-02-15 12:38:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-02-15 12:38:27,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-15 12:38:33,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425534832] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:33,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:33,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 66] total 76 [2023-02-15 12:38:33,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924084447] [2023-02-15 12:38:33,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:33,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-15 12:38:33,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-15 12:38:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5436, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 12:38:33,910 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2023-02-15 12:38:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:35,951 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2023-02-15 12:38:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 12:38:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) Word has length 152 [2023-02-15 12:38:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:35,952 INFO L225 Difference]: With dead ends: 147 [2023-02-15 12:38:35,952 INFO L226 Difference]: Without dead ends: 143 [2023-02-15 12:38:35,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 295 SyntacticMatches, 22 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=907, Invalid=12899, Unknown=0, NotChecked=0, Total=13806 [2023-02-15 12:38:35,955 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:35,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1385 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 12:38:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-15 12:38:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 84. [2023-02-15 12:38:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2023-02-15 12:38:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2023-02-15 12:38:35,961 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 152 [2023-02-15 12:38:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:35,961 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2023-02-15 12:38:35,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2023-02-15 12:38:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2023-02-15 12:38:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-15 12:38:35,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:35,963 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:35,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-15 12:38:36,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:36,169 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1972833494, now seen corresponding path program 10 times [2023-02-15 12:38:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:36,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341478971] [2023-02-15 12:38:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:36,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:36,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:37,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:38,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:39,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:39,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:39,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:39,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 340 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2023-02-15 12:38:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341478971] [2023-02-15 12:38:39,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341478971] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425998929] [2023-02-15 12:38:39,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:38:39,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:39,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:39,339 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:39,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 12:38:39,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:38:39,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:39,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 184 conjunts are in the unsatisfiable core [2023-02-15 12:38:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-02-15 12:38:39,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:38:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-02-15 12:38:46,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425998929] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:38:46,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:38:46,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 69] total 78 [2023-02-15 12:38:46,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527625794] [2023-02-15 12:38:46,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:38:46,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-15 12:38:46,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:38:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-15 12:38:46,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=5737, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 12:38:46,571 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2023-02-15 12:38:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:38:48,768 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2023-02-15 12:38:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 12:38:48,768 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) Word has length 159 [2023-02-15 12:38:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:38:48,769 INFO L225 Difference]: With dead ends: 153 [2023-02-15 12:38:48,769 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 12:38:48,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 312 SyntacticMatches, 21 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=988, Invalid=14018, Unknown=0, NotChecked=0, Total=15006 [2023-02-15 12:38:48,771 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 35 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 12:38:48,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1403 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 12:38:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 12:38:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2023-02-15 12:38:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2023-02-15 12:38:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2023-02-15 12:38:48,777 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 159 [2023-02-15 12:38:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:38:48,778 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2023-02-15 12:38:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2023-02-15 12:38:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2023-02-15 12:38:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-02-15 12:38:48,779 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:38:48,779 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:38:48,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-15 12:38:48,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 12:38:48,992 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:38:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:38:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1740548132, now seen corresponding path program 11 times [2023-02-15 12:38:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:38:48,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272937285] [2023-02-15 12:38:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:38:48,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:38:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:49,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:49,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:49,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:50,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:50,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:50,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:50,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:50,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:50,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:51,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:52,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:52,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:52,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:52,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:38:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:38:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2023-02-15 12:38:52,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:38:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272937285] [2023-02-15 12:38:52,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272937285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:38:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525013479] [2023-02-15 12:38:52,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:38:52,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:38:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:38:52,524 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:38:52,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 12:38:52,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-15 12:38:52,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:38:52,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 192 conjunts are in the unsatisfiable core [2023-02-15 12:38:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:38:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2023-02-15 12:38:53,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:39:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-15 12:39:00,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525013479] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:39:00,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:39:00,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 72] total 82 [2023-02-15 12:39:00,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793734890] [2023-02-15 12:39:00,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:39:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-02-15 12:39:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:39:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-02-15 12:39:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=6356, Unknown=0, NotChecked=0, Total=6642 [2023-02-15 12:39:00,500 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2023-02-15 12:39:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:39:02,830 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2023-02-15 12:39:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-15 12:39:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) Word has length 166 [2023-02-15 12:39:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:39:02,832 INFO L225 Difference]: With dead ends: 159 [2023-02-15 12:39:02,832 INFO L226 Difference]: Without dead ends: 155 [2023-02-15 12:39:02,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1036, Invalid=15220, Unknown=0, NotChecked=0, Total=16256 [2023-02-15 12:39:02,834 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 149 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 2892 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:39:02,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1515 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2892 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 12:39:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-15 12:39:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2023-02-15 12:39:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2023-02-15 12:39:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2023-02-15 12:39:02,839 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 166 [2023-02-15 12:39:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:39:02,839 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2023-02-15 12:39:02,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2023-02-15 12:39:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2023-02-15 12:39:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-02-15 12:39:02,840 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:39:02,841 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:39:02,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 12:39:03,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 12:39:03,047 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:39:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:39:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash 85910596, now seen corresponding path program 11 times [2023-02-15 12:39:03,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:39:03,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286917893] [2023-02-15 12:39:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:39:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:39:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:03,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:04,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:04,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:04,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:04,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:05,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:05,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:05,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:05,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:05,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:05,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:05,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:06,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-02-15 12:39:07,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:39:07,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286917893] [2023-02-15 12:39:07,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286917893] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:07,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068417291] [2023-02-15 12:39:07,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:39:07,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:07,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:39:07,064 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:39:07,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 12:39:07,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-15 12:39:07,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:39:07,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 200 conjunts are in the unsatisfiable core [2023-02-15 12:39:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:39:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-02-15 12:39:07,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:39:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-02-15 12:39:15,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068417291] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:39:15,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:39:15,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 75] total 84 [2023-02-15 12:39:15,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776111183] [2023-02-15 12:39:15,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:39:15,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-15 12:39:15,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:39:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-15 12:39:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=6682, Unknown=0, NotChecked=0, Total=6972 [2023-02-15 12:39:15,640 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2023-02-15 12:39:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:39:18,007 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2023-02-15 12:39:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 12:39:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) Word has length 173 [2023-02-15 12:39:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:39:18,008 INFO L225 Difference]: With dead ends: 165 [2023-02-15 12:39:18,008 INFO L226 Difference]: Without dead ends: 161 [2023-02-15 12:39:18,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 340 SyntacticMatches, 23 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1122, Invalid=16434, Unknown=0, NotChecked=0, Total=17556 [2023-02-15 12:39:18,011 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 96 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 12:39:18,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1292 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 12:39:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-15 12:39:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2023-02-15 12:39:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 26 states have call predecessors, (27), 3 states have call successors, (27) [2023-02-15 12:39:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2023-02-15 12:39:18,018 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 173 [2023-02-15 12:39:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:39:18,018 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2023-02-15 12:39:18,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2023-02-15 12:39:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2023-02-15 12:39:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-02-15 12:39:18,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:39:18,020 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:39:18,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 12:39:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 12:39:18,220 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:39:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:39:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1923299322, now seen corresponding path program 12 times [2023-02-15 12:39:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:39:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934099187] [2023-02-15 12:39:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:39:18,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:39:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:18,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:18,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:19,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:19,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:19,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:20,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:20,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:20,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:20,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:20,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:21,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:21,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:21,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:21,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:21,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:21,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:21,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:21,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:22,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:22,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:22,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:22,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:22,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-02-15 12:39:22,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:39:22,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934099187] [2023-02-15 12:39:22,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934099187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:22,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173743380] [2023-02-15 12:39:22,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:39:22,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:22,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:39:22,485 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:39:22,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 12:39:22,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 12:39:22,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:39:22,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 208 conjunts are in the unsatisfiable core [2023-02-15 12:39:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:39:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-02-15 12:39:23,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:39:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-15 12:39:31,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173743380] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:39:31,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:39:31,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 78] total 88 [2023-02-15 12:39:31,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46825168] [2023-02-15 12:39:31,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:39:31,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-02-15 12:39:31,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:39:31,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-02-15 12:39:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=7348, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 12:39:31,735 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2023-02-15 12:39:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:39:34,386 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2023-02-15 12:39:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 12:39:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) Word has length 180 [2023-02-15 12:39:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:39:34,388 INFO L225 Difference]: With dead ends: 171 [2023-02-15 12:39:34,388 INFO L226 Difference]: Without dead ends: 167 [2023-02-15 12:39:34,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 351 SyntacticMatches, 26 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1173, Invalid=17733, Unknown=0, NotChecked=0, Total=18906 [2023-02-15 12:39:34,390 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 3164 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 3260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:39:34,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1620 Invalid, 3260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3164 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 12:39:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-15 12:39:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2023-02-15 12:39:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 27 states have call predecessors, (28), 3 states have call successors, (28) [2023-02-15 12:39:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2023-02-15 12:39:34,397 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 180 [2023-02-15 12:39:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:39:34,398 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2023-02-15 12:39:34,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2023-02-15 12:39:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2023-02-15 12:39:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-02-15 12:39:34,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:39:34,399 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:39:34,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 12:39:34,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:34,606 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:39:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:39:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash 853137374, now seen corresponding path program 12 times [2023-02-15 12:39:34,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:39:34,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622851553] [2023-02-15 12:39:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:39:34,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:39:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:35,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:35,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:35,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:35,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:36,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:36,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:36,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:36,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:37,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:37,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:37,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:37,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:37,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:37,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:38,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:39,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:39:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:39:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-15 12:39:39,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:39:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622851553] [2023-02-15 12:39:39,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622851553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:39:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844522447] [2023-02-15 12:39:39,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:39:39,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:39:39,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:39:39,258 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:39:39,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 12:39:39,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 12:39:39,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:39:39,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 164 conjunts are in the unsatisfiable core [2023-02-15 12:39:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:39:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-02-15 12:39:42,422 INFO L328 TraceCheckSpWp]: Computing backward predicates...