./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/loops-crafted-1/watermelon.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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:34:50,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:34:50,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:34:50,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:34:51,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:34:51,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:34:51,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:34:51,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:34:51,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:34:51,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:34:51,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:34:51,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:34:51,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:34:51,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:34:51,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:34:51,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:34:51,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:34:51,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:34:51,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:34:51,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:34:51,041 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:34:51,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:34:51,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:34:51,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:34:51,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:34:51,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:34:51,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:34:51,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:34:51,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:34:51,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:34:51,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:34:51,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:34:51,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:34:51,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:34:51,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:34:51,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:34:51,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:34:51,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:34:51,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:34:51,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:34:51,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:34:51,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:34:51,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:34:51,096 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:34:51,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:34:51,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:34:51,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:34:51,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:34:51,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:34:51,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:34:51,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:34:51,099 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:34:51,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:34:51,101 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:34:51,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:34:51,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:34:51,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:34:51,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:34:51,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:34:51,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:34:51,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:34:51,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:34:51,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:34:51,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:34:51,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:34:51,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:34:51,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:34:51,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:34:51,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:34:51,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:34:51,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:34:51,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:34:51,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:34:51,106 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:34:51,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:34:51,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:34:51,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 [2022-07-22 15:34:51,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:34:51,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:34:51,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:34:51,335 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:34:51,336 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:34:51,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2022-07-22 15:34:51,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5ade7c9/d77db7892d1b4e90a9575c309a82d2a5/FLAG01b3b7c85 [2022-07-22 15:34:51,750 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:34:51,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c [2022-07-22 15:34:51,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5ade7c9/d77db7892d1b4e90a9575c309a82d2a5/FLAG01b3b7c85 [2022-07-22 15:34:52,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5ade7c9/d77db7892d1b4e90a9575c309a82d2a5 [2022-07-22 15:34:52,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:34:52,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:34:52,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:34:52,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:34:52,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:34:52,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8367d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52, skipping insertion in model container [2022-07-22 15:34:52,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:34:52,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:34:52,402 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2022-07-22 15:34:52,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:34:52,425 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:34:52,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2022-07-22 15:34:52,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:34:52,469 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:34:52,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52 WrapperNode [2022-07-22 15:34:52,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:34:52,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:34:52,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:34:52,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:34:52,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,504 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2022-07-22 15:34:52,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:34:52,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:34:52,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:34:52,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:34:52,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:34:52,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:34:52,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:34:52,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:34:52,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (1/1) ... [2022-07-22 15:34:52,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:34:52,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:34:52,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 15:34:52,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 15:34:52,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:34:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:34:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:34:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:34:52,683 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:34:52,684 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:34:52,867 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:34:52,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:34:52,884 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 15:34:52,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:34:52 BoogieIcfgContainer [2022-07-22 15:34:52,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:34:52,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:34:52,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:34:52,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:34:52,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:34:52" (1/3) ... [2022-07-22 15:34:52,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fbb11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:34:52, skipping insertion in model container [2022-07-22 15:34:52,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:34:52" (2/3) ... [2022-07-22 15:34:52,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fbb11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:34:52, skipping insertion in model container [2022-07-22 15:34:52,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:34:52" (3/3) ... [2022-07-22 15:34:52,894 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2022-07-22 15:34:52,906 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:34:52,919 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:34:52,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:34:52,978 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f1a767f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@27747d7 [2022-07-22 15:34:52,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:34:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 15:34:52,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:52,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:52,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2143149025, now seen corresponding path program 1 times [2022-07-22 15:34:53,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:53,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312158276] [2022-07-22 15:34:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:53,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:53,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:53,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312158276] [2022-07-22 15:34:53,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312158276] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:34:53,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:34:53,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 15:34:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404022870] [2022-07-22 15:34:53,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:34:53,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 15:34:53,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 15:34:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:34:53,281 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:53,461 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-07-22 15:34:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 15:34:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 15:34:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:53,471 INFO L225 Difference]: With dead ends: 68 [2022-07-22 15:34:53,471 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 15:34:53,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:34:53,481 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:53,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:34:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 15:34:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-07-22 15:34:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-22 15:34:53,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2022-07-22 15:34:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:53,514 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-22 15:34:53,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-07-22 15:34:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:34:53,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:53,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:53,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:34:53,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash -906524851, now seen corresponding path program 1 times [2022-07-22 15:34:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:53,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073827746] [2022-07-22 15:34:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:53,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:53,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073827746] [2022-07-22 15:34:53,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073827746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:34:53,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:34:53,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:34:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402191247] [2022-07-22 15:34:53,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:34:53,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 15:34:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 15:34:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:34:53,596 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:53,617 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-07-22 15:34:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 15:34:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 15:34:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:53,620 INFO L225 Difference]: With dead ends: 35 [2022-07-22 15:34:53,621 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 15:34:53,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:34:53,626 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:53,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:34:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 15:34:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-07-22 15:34:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-22 15:34:53,636 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2022-07-22 15:34:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:53,638 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-22 15:34:53,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-22 15:34:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:34:53,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:53,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:53,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:34:53,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1897717841, now seen corresponding path program 1 times [2022-07-22 15:34:53,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:53,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141614007] [2022-07-22 15:34:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:53,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:53,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:53,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141614007] [2022-07-22 15:34:53,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141614007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:34:53,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:34:53,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:34:53,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43844467] [2022-07-22 15:34:53,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:34:53,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 15:34:53,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:53,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 15:34:53,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:34:53,702 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:53,726 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-07-22 15:34:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 15:34:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 15:34:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:53,729 INFO L225 Difference]: With dead ends: 48 [2022-07-22 15:34:53,729 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 15:34:53,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:34:53,736 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:53,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:34:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 15:34:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-07-22 15:34:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-22 15:34:53,744 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2022-07-22 15:34:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:53,745 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-22 15:34:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-22 15:34:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 15:34:53,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:53,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:53,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 15:34:53,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:53,747 INFO L85 PathProgramCache]: Analyzing trace with hash 983883823, now seen corresponding path program 1 times [2022-07-22 15:34:53,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:53,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131161190] [2022-07-22 15:34:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:53,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:53,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:53,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131161190] [2022-07-22 15:34:53,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131161190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:34:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437518462] [2022-07-22 15:34:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:53,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:53,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:34:53,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:34:53,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:34:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:53,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 15:34:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:34:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:34:54,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:34:54,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437518462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:34:54,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:34:54,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-07-22 15:34:54,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576201850] [2022-07-22 15:34:54,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:34:54,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:34:54,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:34:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:34:54,248 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:54,369 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-07-22 15:34:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:34:54,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 15:34:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:54,371 INFO L225 Difference]: With dead ends: 44 [2022-07-22 15:34:54,371 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 15:34:54,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:34:54,378 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:54,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:34:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 15:34:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-07-22 15:34:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-22 15:34:54,389 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2022-07-22 15:34:54,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:54,390 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-22 15:34:54,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-22 15:34:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 15:34:54,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:54,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:54,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:34:54,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:54,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:54,608 INFO L85 PathProgramCache]: Analyzing trace with hash 891572815, now seen corresponding path program 1 times [2022-07-22 15:34:54,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:54,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062373731] [2022-07-22 15:34:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:54,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:54,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:54,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062373731] [2022-07-22 15:34:54,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062373731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:34:54,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427342146] [2022-07-22 15:34:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:54,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:54,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:34:54,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:34:54,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:34:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:54,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 15:34:54,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:34:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:54,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:34:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:54,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427342146] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:34:54,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:34:54,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-22 15:34:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884402687] [2022-07-22 15:34:54,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:34:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 15:34:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 15:34:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:34:54,785 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:54,808 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-07-22 15:34:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:34:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 15:34:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:54,812 INFO L225 Difference]: With dead ends: 50 [2022-07-22 15:34:54,813 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 15:34:54,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:34:54,814 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:54,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:34:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 15:34:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-07-22 15:34:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-22 15:34:54,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-07-22 15:34:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:54,822 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-22 15:34:54,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-22 15:34:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 15:34:54,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:54,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:54,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 15:34:55,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:55,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash 353844429, now seen corresponding path program 2 times [2022-07-22 15:34:55,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:55,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326100743] [2022-07-22 15:34:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:55,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:34:55,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326100743] [2022-07-22 15:34:55,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326100743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:34:55,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:34:55,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 15:34:55,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061257121] [2022-07-22 15:34:55,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:34:55,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:34:55,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:55,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:34:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:34:55,140 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:55,174 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-22 15:34:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:34:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 15:34:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:55,175 INFO L225 Difference]: With dead ends: 34 [2022-07-22 15:34:55,175 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 15:34:55,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:34:55,176 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:55,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:34:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 15:34:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-22 15:34:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-22 15:34:55,185 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-07-22 15:34:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:55,186 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-22 15:34:55,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-22 15:34:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 15:34:55,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:55,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:55,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 15:34:55,187 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1453414625, now seen corresponding path program 1 times [2022-07-22 15:34:55,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:55,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575565636] [2022-07-22 15:34:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:55,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:34:55,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575565636] [2022-07-22 15:34:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575565636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:34:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168340729] [2022-07-22 15:34:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:55,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:55,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:34:55,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:34:55,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:34:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:55,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 15:34:55,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:34:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:34:55,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:34:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:34:55,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168340729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:34:55,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:34:55,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-07-22 15:34:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528916169] [2022-07-22 15:34:55,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:34:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 15:34:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 15:34:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:34:55,347 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:55,425 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-07-22 15:34:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 15:34:55,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 15:34:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:55,426 INFO L225 Difference]: With dead ends: 56 [2022-07-22 15:34:55,426 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 15:34:55,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-22 15:34:55,427 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:55,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 68 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:34:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 15:34:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-07-22 15:34:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-07-22 15:34:55,438 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2022-07-22 15:34:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:55,438 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-07-22 15:34:55,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-07-22 15:34:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 15:34:55,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:55,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:55,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:34:55,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:55,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1604143171, now seen corresponding path program 1 times [2022-07-22 15:34:55,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:55,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55061789] [2022-07-22 15:34:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:34:55,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:55,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55061789] [2022-07-22 15:34:55,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55061789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:34:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199427676] [2022-07-22 15:34:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:55,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:55,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:34:55,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:34:55,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:34:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:55,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 15:34:55,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:34:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:34:55,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:34:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:34:55,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199427676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:34:55,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:34:55,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 15:34:55,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861515015] [2022-07-22 15:34:55,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:34:55,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 15:34:55,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 15:34:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:34:55,861 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:55,911 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-07-22 15:34:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 15:34:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 15:34:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:55,915 INFO L225 Difference]: With dead ends: 59 [2022-07-22 15:34:55,915 INFO L226 Difference]: Without dead ends: 54 [2022-07-22 15:34:55,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:34:55,916 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:55,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 113 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:34:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-22 15:34:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2022-07-22 15:34:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-07-22 15:34:55,933 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2022-07-22 15:34:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:55,933 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-07-22 15:34:55,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-07-22 15:34:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 15:34:55,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:55,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:55,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:34:56,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:56,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:56,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1602296129, now seen corresponding path program 1 times [2022-07-22 15:34:56,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:56,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756391945] [2022-07-22 15:34:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:56,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 15:34:56,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:56,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756391945] [2022-07-22 15:34:56,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756391945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:34:56,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:34:56,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 15:34:56,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972384833] [2022-07-22 15:34:56,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:34:56,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:34:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:34:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:34:56,215 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:56,274 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-07-22 15:34:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 15:34:56,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 15:34:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:56,275 INFO L225 Difference]: With dead ends: 49 [2022-07-22 15:34:56,275 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 15:34:56,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:34:56,276 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:56,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:34:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 15:34:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-07-22 15:34:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-22 15:34:56,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2022-07-22 15:34:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:56,286 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-22 15:34:56,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-22 15:34:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 15:34:56,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:56,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:56,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 15:34:56,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1934230497, now seen corresponding path program 2 times [2022-07-22 15:34:56,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:56,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836224094] [2022-07-22 15:34:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:56,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:56,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836224094] [2022-07-22 15:34:56,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836224094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:34:56,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599704416] [2022-07-22 15:34:56,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:34:56,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:56,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:34:56,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:34:56,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:34:56,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:34:56,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:34:56,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 15:34:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:34:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:56,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:34:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:57,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599704416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:34:57,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:34:57,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-07-22 15:34:57,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305582596] [2022-07-22 15:34:57,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:34:57,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 15:34:57,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 15:34:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-07-22 15:34:57,077 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:57,440 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-07-22 15:34:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:34:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 15:34:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:57,441 INFO L225 Difference]: With dead ends: 55 [2022-07-22 15:34:57,441 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 15:34:57,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-07-22 15:34:57,442 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:57,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 79 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:34:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 15:34:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-07-22 15:34:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-07-22 15:34:57,454 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2022-07-22 15:34:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:57,454 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-07-22 15:34:57,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-07-22 15:34:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 15:34:57,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:57,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:57,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:34:57,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 15:34:57,672 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:57,672 INFO L85 PathProgramCache]: Analyzing trace with hash 836427775, now seen corresponding path program 2 times [2022-07-22 15:34:57,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:57,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376993102] [2022-07-22 15:34:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:57,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376993102] [2022-07-22 15:34:57,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376993102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:34:57,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030012642] [2022-07-22 15:34:57,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:34:57,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:57,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:34:57,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:34:57,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:34:57,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:34:57,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:34:57,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 15:34:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:34:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:58,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:34:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:58,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030012642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:34:58,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:34:58,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-07-22 15:34:58,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061201854] [2022-07-22 15:34:58,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:34:58,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 15:34:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 15:34:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-07-22 15:34:58,393 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:34:58,633 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-07-22 15:34:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 15:34:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 15:34:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:34:58,634 INFO L225 Difference]: With dead ends: 47 [2022-07-22 15:34:58,634 INFO L226 Difference]: Without dead ends: 41 [2022-07-22 15:34:58,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:34:58,635 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:34:58,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 38 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:34:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-22 15:34:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-07-22 15:34:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-07-22 15:34:58,644 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2022-07-22 15:34:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:34:58,645 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-07-22 15:34:58,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:34:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-07-22 15:34:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 15:34:58,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:34:58,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:34:58,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 15:34:58,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:58,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:34:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:34:58,868 INFO L85 PathProgramCache]: Analyzing trace with hash 924111969, now seen corresponding path program 3 times [2022-07-22 15:34:58,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:34:58,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211917636] [2022-07-22 15:34:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:34:58,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:34:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:34:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:59,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:34:59,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211917636] [2022-07-22 15:34:59,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211917636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:34:59,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985663299] [2022-07-22 15:34:59,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:34:59,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:34:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:34:59,126 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:34:59,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:34:59,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 15:34:59,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:34:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:34:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:34:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:59,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:34:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:34:59,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985663299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:34:59,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:34:59,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-07-22 15:34:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148867105] [2022-07-22 15:34:59,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:34:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 15:34:59,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:34:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 15:34:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-07-22 15:34:59,850 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:00,624 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-07-22 15:35:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 15:35:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 15:35:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:00,626 INFO L225 Difference]: With dead ends: 83 [2022-07-22 15:35:00,626 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 15:35:00,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 15:35:00,627 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 193 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:00,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 121 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 15:35:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2022-07-22 15:35:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-22 15:35:00,637 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2022-07-22 15:35:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:00,637 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-22 15:35:00,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-22 15:35:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 15:35:00,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:00,638 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:00,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:00,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:00,861 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash -98803427, now seen corresponding path program 3 times [2022-07-22 15:35:00,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:00,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276166757] [2022-07-22 15:35:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:00,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276166757] [2022-07-22 15:35:01,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276166757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579004312] [2022-07-22 15:35:01,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:35:01,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:01,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:01,104 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:01,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:35:01,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 15:35:01,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:35:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:01,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:01,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579004312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:01,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:01,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-07-22 15:35:01,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933595125] [2022-07-22 15:35:01,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:01,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 15:35:01,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:01,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 15:35:01,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:35:01,682 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:02,062 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-07-22 15:35:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 15:35:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 15:35:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:02,062 INFO L225 Difference]: With dead ends: 65 [2022-07-22 15:35:02,063 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 15:35:02,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 15:35:02,064 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 172 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:02,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 62 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 15:35:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2022-07-22 15:35:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-07-22 15:35:02,076 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2022-07-22 15:35:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:02,077 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-07-22 15:35:02,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-07-22 15:35:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 15:35:02,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:02,079 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:02,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:02,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 15:35:02,296 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1588252031, now seen corresponding path program 4 times [2022-07-22 15:35:02,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:02,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689730492] [2022-07-22 15:35:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:02,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:02,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:02,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689730492] [2022-07-22 15:35:02,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689730492] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:02,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774775638] [2022-07-22 15:35:02,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:35:02,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:02,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:02,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:02,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 15:35:02,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:35:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:35:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:02,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:03,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774775638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:03,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:03,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-07-22 15:35:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655940671] [2022-07-22 15:35:03,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:03,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 15:35:03,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 15:35:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-07-22 15:35:03,110 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:03,496 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-07-22 15:35:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 15:35:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-22 15:35:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:03,497 INFO L225 Difference]: With dead ends: 63 [2022-07-22 15:35:03,497 INFO L226 Difference]: Without dead ends: 44 [2022-07-22 15:35:03,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 15:35:03,498 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:03,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 51 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-22 15:35:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-07-22 15:35:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-07-22 15:35:03,507 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2022-07-22 15:35:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:03,508 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-07-22 15:35:03,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-07-22 15:35:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 15:35:03,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:03,508 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:03,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:03,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 15:35:03,709 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash -462032417, now seen corresponding path program 4 times [2022-07-22 15:35:03,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:03,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406495740] [2022-07-22 15:35:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:03,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:03,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:03,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406495740] [2022-07-22 15:35:03,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406495740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:03,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556539166] [2022-07-22 15:35:03,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:35:03,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:03,948 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:03,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 15:35:03,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:35:03,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:03,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:35:03,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:04,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:04,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556539166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:04,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:04,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-07-22 15:35:04,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360387269] [2022-07-22 15:35:04,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:04,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 15:35:04,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 15:35:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2022-07-22 15:35:04,489 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:04,758 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-07-22 15:35:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 15:35:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-22 15:35:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:04,759 INFO L225 Difference]: With dead ends: 53 [2022-07-22 15:35:04,759 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 15:35:04,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=346, Invalid=914, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 15:35:04,760 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 94 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:04,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 32 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 15:35:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-07-22 15:35:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-07-22 15:35:04,771 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 29 [2022-07-22 15:35:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:04,771 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-07-22 15:35:04,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-07-22 15:35:04,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 15:35:04,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:04,774 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:04,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:04,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 15:35:04,997 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1355616703, now seen corresponding path program 5 times [2022-07-22 15:35:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:04,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836037605] [2022-07-22 15:35:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836037605] [2022-07-22 15:35:05,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836037605] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053982418] [2022-07-22 15:35:05,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:35:05,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:05,249 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:05,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 15:35:05,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-22 15:35:05,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 15:35:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:05,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:05,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053982418] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:05,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:05,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-07-22 15:35:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781911781] [2022-07-22 15:35:05,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:05,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 15:35:05,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:05,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 15:35:05,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 15:35:05,979 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:06,767 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-07-22 15:35:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:35:06,767 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-22 15:35:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:06,768 INFO L225 Difference]: With dead ends: 93 [2022-07-22 15:35:06,768 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 15:35:06,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=485, Invalid=1771, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 15:35:06,769 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 253 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:06,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 105 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 15:35:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2022-07-22 15:35:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-07-22 15:35:06,779 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2022-07-22 15:35:06,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:06,779 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-07-22 15:35:06,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-07-22 15:35:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 15:35:06,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:06,780 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:06,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:07,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 15:35:07,004 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash 943358845, now seen corresponding path program 5 times [2022-07-22 15:35:07,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:07,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199865785] [2022-07-22 15:35:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:07,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:07,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199865785] [2022-07-22 15:35:07,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199865785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984847902] [2022-07-22 15:35:07,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:35:07,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:07,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:07,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:07,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 15:35:07,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-22 15:35:07,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 15:35:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:07,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984847902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:07,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:07,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-22 15:35:07,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269541559] [2022-07-22 15:35:07,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:07,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 15:35:07,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:07,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 15:35:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 15:35:07,893 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:08,296 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-07-22 15:35:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 15:35:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-22 15:35:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:08,297 INFO L225 Difference]: With dead ends: 71 [2022-07-22 15:35:08,297 INFO L226 Difference]: Without dead ends: 65 [2022-07-22 15:35:08,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=511, Invalid=1469, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 15:35:08,299 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:08,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 74 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-22 15:35:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2022-07-22 15:35:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-07-22 15:35:08,309 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2022-07-22 15:35:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:08,310 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-07-22 15:35:08,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-07-22 15:35:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 15:35:08,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:08,311 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:08,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:08,519 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 [2022-07-22 15:35:08,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1916151841, now seen corresponding path program 6 times [2022-07-22 15:35:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:08,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494889520] [2022-07-22 15:35:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:08,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:08,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:08,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494889520] [2022-07-22 15:35:08,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494889520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:08,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616969525] [2022-07-22 15:35:08,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:35:08,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:08,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:08,736 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) [2022-07-22 15:35:08,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 15:35:08,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 15:35:08,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:08,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 15:35:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:09,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:09,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616969525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:09,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:09,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-07-22 15:35:09,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336803170] [2022-07-22 15:35:09,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:09,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 15:35:09,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 15:35:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 15:35:09,371 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:09,790 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-07-22 15:35:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 15:35:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-22 15:35:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:09,791 INFO L225 Difference]: With dead ends: 71 [2022-07-22 15:35:09,791 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 15:35:09,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 15:35:09,794 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:09,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 121 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 15:35:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-22 15:35:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-07-22 15:35:09,804 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2022-07-22 15:35:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:09,805 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-07-22 15:35:09,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-07-22 15:35:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 15:35:09,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:09,805 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:09,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:10,011 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 [2022-07-22 15:35:10,011 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:10,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1672289471, now seen corresponding path program 6 times [2022-07-22 15:35:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098272922] [2022-07-22 15:35:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:10,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:10,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:10,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098272922] [2022-07-22 15:35:10,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098272922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:10,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634598972] [2022-07-22 15:35:10,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:35:10,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:10,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:10,269 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) [2022-07-22 15:35:10,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 15:35:10,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 15:35:10,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:10,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 15:35:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:10,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:10,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634598972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:10,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:10,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-07-22 15:35:10,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441681442] [2022-07-22 15:35:10,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:10,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 15:35:10,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 15:35:10,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 15:35:10,822 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:11,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:11,114 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-07-22 15:35:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 15:35:11,114 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-22 15:35:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:11,115 INFO L225 Difference]: With dead ends: 59 [2022-07-22 15:35:11,115 INFO L226 Difference]: Without dead ends: 53 [2022-07-22 15:35:11,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 15:35:11,116 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 184 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:11,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 28 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-22 15:35:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-07-22 15:35:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-07-22 15:35:11,127 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2022-07-22 15:35:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:11,127 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-07-22 15:35:11,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-07-22 15:35:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 15:35:11,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:11,128 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:11,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:11,339 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 [2022-07-22 15:35:11,339 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1028317473, now seen corresponding path program 7 times [2022-07-22 15:35:11,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442567004] [2022-07-22 15:35:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:11,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:11,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:11,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442567004] [2022-07-22 15:35:11,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442567004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:11,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467295637] [2022-07-22 15:35:11,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:35:11,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:11,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:11,684 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) [2022-07-22 15:35:11,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 15:35:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 15:35:11,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:12,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:12,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467295637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:12,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:12,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2022-07-22 15:35:12,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765519272] [2022-07-22 15:35:12,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:12,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 15:35:12,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 15:35:12,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 15:35:12,478 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:13,419 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2022-07-22 15:35:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 15:35:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-22 15:35:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:13,421 INFO L225 Difference]: With dead ends: 103 [2022-07-22 15:35:13,421 INFO L226 Difference]: Without dead ends: 80 [2022-07-22 15:35:13,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=600, Invalid=2262, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 15:35:13,422 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 238 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:13,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 110 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:13,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-22 15:35:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2022-07-22 15:35:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-07-22 15:35:13,434 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2022-07-22 15:35:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:13,434 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-07-22 15:35:13,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-07-22 15:35:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 15:35:13,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:13,435 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:13,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 15:35:13,654 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 [2022-07-22 15:35:13,654 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:13,655 INFO L85 PathProgramCache]: Analyzing trace with hash 208821981, now seen corresponding path program 7 times [2022-07-22 15:35:13,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:13,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253801446] [2022-07-22 15:35:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:13,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:13,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253801446] [2022-07-22 15:35:13,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253801446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:13,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239353016] [2022-07-22 15:35:13,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:35:13,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:13,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:13,952 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) [2022-07-22 15:35:13,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 15:35:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:13,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 15:35:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:14,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:14,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239353016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:14,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:14,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2022-07-22 15:35:14,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063519501] [2022-07-22 15:35:14,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:14,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 15:35:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 15:35:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 15:35:14,595 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:15,044 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-07-22 15:35:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 15:35:15,045 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-22 15:35:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:15,045 INFO L225 Difference]: With dead ends: 77 [2022-07-22 15:35:15,045 INFO L226 Difference]: Without dead ends: 71 [2022-07-22 15:35:15,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=652, Invalid=1898, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 15:35:15,047 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:15,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 100 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-22 15:35:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2022-07-22 15:35:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-07-22 15:35:15,059 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2022-07-22 15:35:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:15,060 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-07-22 15:35:15,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-07-22 15:35:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 15:35:15,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:15,060 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:15,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:15,261 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 [2022-07-22 15:35:15,261 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:15,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:15,261 INFO L85 PathProgramCache]: Analyzing trace with hash 863525695, now seen corresponding path program 8 times [2022-07-22 15:35:15,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:15,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802277019] [2022-07-22 15:35:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:15,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:15,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:15,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802277019] [2022-07-22 15:35:15,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802277019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:15,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710713042] [2022-07-22 15:35:15,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:35:15,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:15,509 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) [2022-07-22 15:35:15,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 15:35:15,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:35:15,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 15:35:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:15,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:16,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710713042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:16,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:16,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2022-07-22 15:35:16,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919767222] [2022-07-22 15:35:16,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:16,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 15:35:16,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:16,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 15:35:16,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 15:35:16,130 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:16,614 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-07-22 15:35:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 15:35:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 15:35:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:16,616 INFO L225 Difference]: With dead ends: 79 [2022-07-22 15:35:16,616 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 15:35:16,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=519, Invalid=1833, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 15:35:16,617 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 120 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:16,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 76 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:16,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 15:35:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-07-22 15:35:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-07-22 15:35:16,626 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2022-07-22 15:35:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:16,626 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-07-22 15:35:16,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-07-22 15:35:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 15:35:16,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:16,627 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:16,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-22 15:35:16,827 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 [2022-07-22 15:35:16,828 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:16,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1276272481, now seen corresponding path program 8 times [2022-07-22 15:35:16,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:16,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519743757] [2022-07-22 15:35:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:16,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:17,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519743757] [2022-07-22 15:35:17,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519743757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840263815] [2022-07-22 15:35:17,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:35:17,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:17,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:17,109 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) [2022-07-22 15:35:17,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 15:35:17,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:35:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 15:35:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:17,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:17,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840263815] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:17,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:17,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2022-07-22 15:35:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585645120] [2022-07-22 15:35:17,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 15:35:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 15:35:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 15:35:17,760 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:18,089 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-07-22 15:35:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 15:35:18,089 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 15:35:18,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:18,089 INFO L225 Difference]: With dead ends: 65 [2022-07-22 15:35:18,089 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 15:35:18,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=602, Invalid=1654, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 15:35:18,090 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 201 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:18,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 54 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 15:35:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-07-22 15:35:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-07-22 15:35:18,110 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2022-07-22 15:35:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:18,110 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-07-22 15:35:18,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-07-22 15:35:18,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 15:35:18,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:18,110 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:18,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:18,311 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 [2022-07-22 15:35:18,311 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:18,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:18,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2138696961, now seen corresponding path program 9 times [2022-07-22 15:35:18,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:18,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627174262] [2022-07-22 15:35:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:18,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627174262] [2022-07-22 15:35:18,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627174262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601701253] [2022-07-22 15:35:18,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:35:18,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:18,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:18,608 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) [2022-07-22 15:35:18,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 15:35:18,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 15:35:18,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 15:35:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:19,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601701253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:19,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:19,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2022-07-22 15:35:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385103077] [2022-07-22 15:35:19,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:19,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 15:35:19,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 15:35:19,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 15:35:19,464 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:20,433 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-07-22 15:35:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 15:35:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 15:35:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:20,434 INFO L225 Difference]: With dead ends: 113 [2022-07-22 15:35:20,434 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 15:35:20,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=729, Invalid=2811, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 15:35:20,436 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 202 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:20,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 111 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:20,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 15:35:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2022-07-22 15:35:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-07-22 15:35:20,450 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2022-07-22 15:35:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:20,451 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-07-22 15:35:20,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-07-22 15:35:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 15:35:20,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:20,453 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:20,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:20,675 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 [2022-07-22 15:35:20,675 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1939262659, now seen corresponding path program 9 times [2022-07-22 15:35:20,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:20,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474825784] [2022-07-22 15:35:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:20,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:21,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474825784] [2022-07-22 15:35:21,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474825784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284994000] [2022-07-22 15:35:21,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:35:21,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:21,014 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) [2022-07-22 15:35:21,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 15:35:21,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 15:35:21,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:21,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 15:35:21,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:21,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284994000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:21,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:21,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2022-07-22 15:35:21,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279012565] [2022-07-22 15:35:21,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:21,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 15:35:21,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:21,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 15:35:21,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 15:35:21,775 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:22,224 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-07-22 15:35:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 15:35:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 15:35:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:22,224 INFO L225 Difference]: With dead ends: 83 [2022-07-22 15:35:22,224 INFO L226 Difference]: Without dead ends: 77 [2022-07-22 15:35:22,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=811, Invalid=2381, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 15:35:22,225 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:22,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 68 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-22 15:35:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2022-07-22 15:35:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-07-22 15:35:22,237 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2022-07-22 15:35:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:22,238 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-07-22 15:35:22,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-07-22 15:35:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 15:35:22,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:22,238 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:22,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:22,438 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 [2022-07-22 15:35:22,439 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:22,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1861511265, now seen corresponding path program 10 times [2022-07-22 15:35:22,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:22,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827750375] [2022-07-22 15:35:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:22,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:22,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827750375] [2022-07-22 15:35:22,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827750375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478328241] [2022-07-22 15:35:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:35:22,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:22,718 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) [2022-07-22 15:35:22,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 15:35:22,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:35:22,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:22,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 15:35:22,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:23,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:23,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478328241] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:23,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:23,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2022-07-22 15:35:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445638440] [2022-07-22 15:35:23,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 15:35:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 15:35:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 15:35:23,434 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:23,964 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2022-07-22 15:35:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:35:23,965 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-22 15:35:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:23,965 INFO L225 Difference]: With dead ends: 87 [2022-07-22 15:35:23,965 INFO L226 Difference]: Without dead ends: 62 [2022-07-22 15:35:23,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=644, Invalid=2326, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 15:35:23,966 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 93 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:23,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 118 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-22 15:35:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-07-22 15:35:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-22 15:35:23,985 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 41 [2022-07-22 15:35:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:23,986 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-22 15:35:23,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-22 15:35:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 15:35:23,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:23,987 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:24,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-22 15:35:24,195 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 [2022-07-22 15:35:24,195 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1603583359, now seen corresponding path program 10 times [2022-07-22 15:35:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:24,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319682530] [2022-07-22 15:35:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:24,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:24,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319682530] [2022-07-22 15:35:24,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319682530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:24,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21461262] [2022-07-22 15:35:24,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:35:24,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:24,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:24,512 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) [2022-07-22 15:35:24,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 15:35:24,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:35:24,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:24,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 15:35:24,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:24,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21461262] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:25,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:25,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2022-07-22 15:35:25,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629259268] [2022-07-22 15:35:25,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:25,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 15:35:25,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 15:35:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 15:35:25,233 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:25,639 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-07-22 15:35:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 15:35:25,639 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-22 15:35:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:25,640 INFO L225 Difference]: With dead ends: 71 [2022-07-22 15:35:25,640 INFO L226 Difference]: Without dead ends: 65 [2022-07-22 15:35:25,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 15:35:25,641 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:25,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 61 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-22 15:35:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-07-22 15:35:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-07-22 15:35:25,657 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 41 [2022-07-22 15:35:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:25,658 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-07-22 15:35:25,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-07-22 15:35:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 15:35:25,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:25,658 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:25,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:25,876 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 [2022-07-22 15:35:25,876 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash -573746719, now seen corresponding path program 11 times [2022-07-22 15:35:25,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:25,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511033867] [2022-07-22 15:35:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:25,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:26,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511033867] [2022-07-22 15:35:26,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511033867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349343039] [2022-07-22 15:35:26,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:35:26,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:26,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:26,282 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) [2022-07-22 15:35:26,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 15:35:26,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 15:35:26,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:26,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 15:35:26,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:26,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:27,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349343039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:27,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:27,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2022-07-22 15:35:27,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334954699] [2022-07-22 15:35:27,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:27,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-22 15:35:27,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-22 15:35:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2092, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 15:35:27,203 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:28,351 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-07-22 15:35:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 15:35:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-22 15:35:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:28,353 INFO L225 Difference]: With dead ends: 123 [2022-07-22 15:35:28,353 INFO L226 Difference]: Without dead ends: 96 [2022-07-22 15:35:28,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=872, Invalid=3418, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 15:35:28,354 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 135 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:28,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 115 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-22 15:35:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2022-07-22 15:35:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-22 15:35:28,365 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 43 [2022-07-22 15:35:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:28,365 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-22 15:35:28,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-22 15:35:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 15:35:28,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:28,366 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:28,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-22 15:35:28,566 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 [2022-07-22 15:35:28,566 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash -709607267, now seen corresponding path program 11 times [2022-07-22 15:35:28,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:28,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215231124] [2022-07-22 15:35:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:28,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:28,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215231124] [2022-07-22 15:35:28,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215231124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703965407] [2022-07-22 15:35:28,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:35:28,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:28,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:28,938 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) [2022-07-22 15:35:28,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 15:35:28,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 15:35:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:28,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 15:35:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:29,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:29,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703965407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:29,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:29,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2022-07-22 15:35:29,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663828280] [2022-07-22 15:35:29,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:29,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 15:35:29,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 15:35:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 15:35:29,729 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:30,275 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-07-22 15:35:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 15:35:30,275 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-22 15:35:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:30,276 INFO L225 Difference]: With dead ends: 89 [2022-07-22 15:35:30,276 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 15:35:30,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=988, Invalid=2918, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 15:35:30,277 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:30,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 77 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 15:35:30,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2022-07-22 15:35:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-07-22 15:35:30,291 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 43 [2022-07-22 15:35:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:30,292 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-07-22 15:35:30,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-07-22 15:35:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 15:35:30,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:30,293 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:30,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-22 15:35:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 15:35:30,503 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1278685953, now seen corresponding path program 12 times [2022-07-22 15:35:30,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:30,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587271724] [2022-07-22 15:35:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587271724] [2022-07-22 15:35:30,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587271724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589749610] [2022-07-22 15:35:30,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:35:30,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:30,810 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:30,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 15:35:30,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-22 15:35:30,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 15:35:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:31,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:31,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589749610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:31,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:31,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2022-07-22 15:35:31,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348842139] [2022-07-22 15:35:31,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:31,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 15:35:31,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 15:35:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 15:35:31,612 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:32,186 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2022-07-22 15:35:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 15:35:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-22 15:35:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:32,186 INFO L225 Difference]: With dead ends: 95 [2022-07-22 15:35:32,186 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 15:35:32,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=783, Invalid=2877, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 15:35:32,187 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:32,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 90 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 15:35:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-22 15:35:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-07-22 15:35:32,209 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 45 [2022-07-22 15:35:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:32,209 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-07-22 15:35:32,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-07-22 15:35:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 15:35:32,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:32,210 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:32,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-22 15:35:32,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:32,410 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1695567009, now seen corresponding path program 12 times [2022-07-22 15:35:32,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:32,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834899079] [2022-07-22 15:35:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:32,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:32,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834899079] [2022-07-22 15:35:32,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834899079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:32,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744588343] [2022-07-22 15:35:32,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:35:32,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:32,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:32,765 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:32,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 15:35:32,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-22 15:35:32,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:32,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 15:35:32,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:33,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:33,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744588343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:33,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:33,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2022-07-22 15:35:33,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956085962] [2022-07-22 15:35:33,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:33,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 15:35:33,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 15:35:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1891, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 15:35:33,562 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:33,931 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-07-22 15:35:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 15:35:33,932 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-22 15:35:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:33,932 INFO L225 Difference]: With dead ends: 77 [2022-07-22 15:35:33,932 INFO L226 Difference]: Without dead ends: 71 [2022-07-22 15:35:33,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 15:35:33,933 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 204 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:33,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 30 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-22 15:35:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-07-22 15:35:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:33,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-07-22 15:35:33,947 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 45 [2022-07-22 15:35:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:33,947 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-07-22 15:35:33,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:33,947 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-07-22 15:35:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 15:35:33,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:33,950 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:33,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-22 15:35:34,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-22 15:35:34,151 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1371385919, now seen corresponding path program 13 times [2022-07-22 15:35:34,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668200873] [2022-07-22 15:35:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:34,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:34,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:34,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668200873] [2022-07-22 15:35:34,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668200873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:34,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271357316] [2022-07-22 15:35:34,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:35:34,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:34,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:34,515 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:34,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 15:35:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 15:35:34,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:35,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:35,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271357316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:35,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:35,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2022-07-22 15:35:35,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643033061] [2022-07-22 15:35:35,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:35,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 15:35:35,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:35,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 15:35:35,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2529, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 15:35:35,490 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:36,532 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-07-22 15:35:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 15:35:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-22 15:35:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:36,533 INFO L225 Difference]: With dead ends: 133 [2022-07-22 15:35:36,533 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 15:35:36,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1029, Invalid=4083, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 15:35:36,534 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 191 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:36,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 126 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 15:35:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2022-07-22 15:35:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-07-22 15:35:36,550 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 47 [2022-07-22 15:35:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:36,550 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-07-22 15:35:36,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-07-22 15:35:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 15:35:36,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:36,550 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:36,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-22 15:35:36,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:36,755 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1311193347, now seen corresponding path program 13 times [2022-07-22 15:35:36,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:36,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384821324] [2022-07-22 15:35:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:37,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384821324] [2022-07-22 15:35:37,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384821324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056940800] [2022-07-22 15:35:37,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:35:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:37,147 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:37,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 15:35:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:37,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 15:35:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:37,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:38,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056940800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:38,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:38,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 55 [2022-07-22 15:35:38,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819825570] [2022-07-22 15:35:38,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:38,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-22 15:35:38,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:38,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-22 15:35:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 15:35:38,064 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:38,601 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-07-22 15:35:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 15:35:38,601 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-22 15:35:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:38,601 INFO L225 Difference]: With dead ends: 95 [2022-07-22 15:35:38,601 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 15:35:38,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1183, Invalid=3509, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 15:35:38,602 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:38,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 75 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 15:35:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2022-07-22 15:35:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-07-22 15:35:38,618 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 47 [2022-07-22 15:35:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:38,618 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-07-22 15:35:38,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-07-22 15:35:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 15:35:38,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:38,619 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:38,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-22 15:35:38,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:38,819 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 417676127, now seen corresponding path program 14 times [2022-07-22 15:35:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203124047] [2022-07-22 15:35:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:39,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:39,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203124047] [2022-07-22 15:35:39,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203124047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:39,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687920802] [2022-07-22 15:35:39,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:35:39,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:39,224 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:39,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 15:35:39,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:35:39,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 15:35:39,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:39,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:40,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687920802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:40,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:40,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2022-07-22 15:35:40,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265805328] [2022-07-22 15:35:40,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:40,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 15:35:40,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 15:35:40,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 15:35:40,150 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:40,742 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-07-22 15:35:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 15:35:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-22 15:35:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:40,743 INFO L225 Difference]: With dead ends: 103 [2022-07-22 15:35:40,743 INFO L226 Difference]: Without dead ends: 74 [2022-07-22 15:35:40,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=936, Invalid=3486, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 15:35:40,744 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 91 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:40,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:35:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-22 15:35:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-07-22 15:35:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-07-22 15:35:40,766 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 49 [2022-07-22 15:35:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:40,766 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-07-22 15:35:40,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-07-22 15:35:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 15:35:40,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:40,767 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:40,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-22 15:35:40,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:40,968 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:40,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1748746815, now seen corresponding path program 14 times [2022-07-22 15:35:40,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:40,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945737576] [2022-07-22 15:35:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:40,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:41,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:41,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945737576] [2022-07-22 15:35:41,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945737576] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:41,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284100916] [2022-07-22 15:35:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:35:41,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:41,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:41,355 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:41,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 15:35:41,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:35:41,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 15:35:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:41,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:42,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284100916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:42,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:42,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2022-07-22 15:35:42,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615345] [2022-07-22 15:35:42,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:42,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 15:35:42,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:42,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 15:35:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 15:35:42,238 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:42,690 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-07-22 15:35:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 15:35:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-22 15:35:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:42,691 INFO L225 Difference]: With dead ends: 83 [2022-07-22 15:35:42,691 INFO L226 Difference]: Without dead ends: 77 [2022-07-22 15:35:42,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 15:35:42,691 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 201 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:42,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 37 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-22 15:35:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-07-22 15:35:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-07-22 15:35:42,709 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 49 [2022-07-22 15:35:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:42,709 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-07-22 15:35:42,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-07-22 15:35:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 15:35:42,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:42,710 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:42,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-22 15:35:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-22 15:35:42,910 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1489381025, now seen corresponding path program 15 times [2022-07-22 15:35:42,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:42,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548451946] [2022-07-22 15:35:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:42,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:43,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548451946] [2022-07-22 15:35:43,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548451946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881646149] [2022-07-22 15:35:43,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:35:43,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:43,324 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:43,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 15:35:43,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-22 15:35:43,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:43,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 15:35:43,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:43,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:44,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881646149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:44,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:44,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 61 [2022-07-22 15:35:44,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048830944] [2022-07-22 15:35:44,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:44,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-22 15:35:44,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-22 15:35:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3007, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 15:35:44,537 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:45,864 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2022-07-22 15:35:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 15:35:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-22 15:35:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:45,865 INFO L225 Difference]: With dead ends: 143 [2022-07-22 15:35:45,866 INFO L226 Difference]: Without dead ends: 112 [2022-07-22 15:35:45,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1200, Invalid=4806, Unknown=0, NotChecked=0, Total=6006 [2022-07-22 15:35:45,867 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 168 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:45,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 100 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-22 15:35:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2022-07-22 15:35:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-07-22 15:35:45,886 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 51 [2022-07-22 15:35:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:45,886 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-07-22 15:35:45,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-07-22 15:35:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 15:35:45,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:45,887 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:45,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-22 15:35:46,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-22 15:35:46,089 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:46,089 INFO L85 PathProgramCache]: Analyzing trace with hash 978060893, now seen corresponding path program 15 times [2022-07-22 15:35:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:46,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120096971] [2022-07-22 15:35:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:46,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:46,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:46,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120096971] [2022-07-22 15:35:46,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120096971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:46,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143931694] [2022-07-22 15:35:46,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:35:46,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:46,543 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:46,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 15:35:46,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-22 15:35:46,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 15:35:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:47,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:47,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143931694] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:47,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:47,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 60 [2022-07-22 15:35:47,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991348450] [2022-07-22 15:35:47,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-22 15:35:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-22 15:35:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2887, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 15:35:47,616 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:48,246 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-07-22 15:35:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 15:35:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-22 15:35:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:48,247 INFO L225 Difference]: With dead ends: 101 [2022-07-22 15:35:48,247 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 15:35:48,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1396, Invalid=4154, Unknown=0, NotChecked=0, Total=5550 [2022-07-22 15:35:48,247 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 274 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:48,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 99 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 15:35:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2022-07-22 15:35:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-07-22 15:35:48,266 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 51 [2022-07-22 15:35:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:48,266 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-07-22 15:35:48,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-07-22 15:35:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 15:35:48,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:48,267 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:48,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-22 15:35:48,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:48,475 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1367745215, now seen corresponding path program 16 times [2022-07-22 15:35:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427236047] [2022-07-22 15:35:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:48,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:48,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427236047] [2022-07-22 15:35:48,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427236047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202047946] [2022-07-22 15:35:48,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:35:48,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:48,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:48,921 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:48,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-22 15:35:48,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:35:48,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:48,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 15:35:48,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:49,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:49,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202047946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:49,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:49,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2022-07-22 15:35:49,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641304771] [2022-07-22 15:35:49,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:49,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 15:35:49,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 15:35:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2771, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 15:35:49,971 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:50,697 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2022-07-22 15:35:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 15:35:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-22 15:35:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:50,698 INFO L225 Difference]: With dead ends: 111 [2022-07-22 15:35:50,698 INFO L226 Difference]: Without dead ends: 80 [2022-07-22 15:35:50,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1103, Invalid=4153, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 15:35:50,699 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 121 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:50,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 78 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-22 15:35:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-07-22 15:35:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-07-22 15:35:50,725 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 53 [2022-07-22 15:35:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:50,725 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-07-22 15:35:50,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-07-22 15:35:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 15:35:50,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:50,726 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:50,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-22 15:35:50,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-22 15:35:50,935 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1146738145, now seen corresponding path program 16 times [2022-07-22 15:35:50,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:50,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926102037] [2022-07-22 15:35:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:50,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:51,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926102037] [2022-07-22 15:35:51,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926102037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669206698] [2022-07-22 15:35:51,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:35:51,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:51,464 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:51,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-22 15:35:51,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:35:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 15:35:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:52,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:52,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669206698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:52,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:52,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2022-07-22 15:35:52,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40609952] [2022-07-22 15:35:52,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:52,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 15:35:52,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 15:35:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 15:35:52,471 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:52,976 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-07-22 15:35:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 15:35:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-22 15:35:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:52,977 INFO L225 Difference]: With dead ends: 89 [2022-07-22 15:35:52,977 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 15:35:52,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1330, Invalid=3782, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 15:35:52,978 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 187 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:52,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 63 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 15:35:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-07-22 15:35:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-07-22 15:35:53,002 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 53 [2022-07-22 15:35:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:53,002 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-07-22 15:35:53,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:53,002 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-07-22 15:35:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 15:35:53,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:53,003 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:53,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-22 15:35:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-22 15:35:53,207 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2067142273, now seen corresponding path program 17 times [2022-07-22 15:35:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174274733] [2022-07-22 15:35:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:53,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174274733] [2022-07-22 15:35:53,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174274733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:53,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396121552] [2022-07-22 15:35:53,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:35:53,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:53,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:53,745 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:53,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-22 15:35:53,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-22 15:35:53,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 15:35:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:54,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:54,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396121552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:54,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:54,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 66 [2022-07-22 15:35:54,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268839892] [2022-07-22 15:35:54,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:54,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-22 15:35:54,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:54,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-22 15:35:54,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=3526, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 15:35:54,981 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:56,252 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-07-22 15:35:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 15:35:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-22 15:35:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:56,253 INFO L225 Difference]: With dead ends: 153 [2022-07-22 15:35:56,253 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 15:35:56,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 15:35:56,254 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 197 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:56,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 122 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 15:35:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2022-07-22 15:35:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-07-22 15:35:56,273 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 55 [2022-07-22 15:35:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:56,273 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-07-22 15:35:56,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-07-22 15:35:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 15:35:56,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:56,274 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:56,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-22 15:35:56,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-22 15:35:56,475 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2087927485, now seen corresponding path program 17 times [2022-07-22 15:35:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:56,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829571447] [2022-07-22 15:35:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:57,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:57,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829571447] [2022-07-22 15:35:57,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829571447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:57,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034677821] [2022-07-22 15:35:57,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:35:57,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:57,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:57,027 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:57,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-22 15:35:57,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-22 15:35:57,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 15:35:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:35:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:57,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:35:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:58,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034677821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:35:58,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:35:58,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 65 [2022-07-22 15:35:58,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033715203] [2022-07-22 15:35:58,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:35:58,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 15:35:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:35:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 15:35:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 15:35:58,145 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:35:58,879 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-07-22 15:35:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 15:35:58,879 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-22 15:35:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:35:58,880 INFO L225 Difference]: With dead ends: 107 [2022-07-22 15:35:58,880 INFO L226 Difference]: Without dead ends: 101 [2022-07-22 15:35:58,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1627, Invalid=4853, Unknown=0, NotChecked=0, Total=6480 [2022-07-22 15:35:58,881 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 273 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:35:58,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 65 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:35:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-22 15:35:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2022-07-22 15:35:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-22 15:35:58,903 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 55 [2022-07-22 15:35:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:35:58,903 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-22 15:35:58,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:35:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-22 15:35:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 15:35:58,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:35:58,904 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:35:58,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-22 15:35:59,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:59,104 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:35:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:35:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1497316577, now seen corresponding path program 18 times [2022-07-22 15:35:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:35:59,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665649976] [2022-07-22 15:35:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:35:59,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:35:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:35:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:35:59,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:35:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665649976] [2022-07-22 15:35:59,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665649976] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:35:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010492365] [2022-07-22 15:35:59,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:35:59,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:35:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:35:59,584 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:35:59,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-22 15:35:59,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-22 15:35:59,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:35:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 15:35:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:00,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:00,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010492365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:00,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:00,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2022-07-22 15:36:00,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101565933] [2022-07-22 15:36:00,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:00,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-22 15:36:00,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-22 15:36:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 15:36:00,757 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:01,552 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2022-07-22 15:36:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 15:36:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-22 15:36:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:01,553 INFO L225 Difference]: With dead ends: 119 [2022-07-22 15:36:01,553 INFO L226 Difference]: Without dead ends: 86 [2022-07-22 15:36:01,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1284, Invalid=4878, Unknown=0, NotChecked=0, Total=6162 [2022-07-22 15:36:01,555 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:01,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 125 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-22 15:36:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-22 15:36:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-07-22 15:36:01,575 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 57 [2022-07-22 15:36:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:01,575 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-07-22 15:36:01,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-07-22 15:36:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 15:36:01,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:01,575 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:01,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-22 15:36:01,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:01,776 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1622398209, now seen corresponding path program 18 times [2022-07-22 15:36:01,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:01,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313057685] [2022-07-22 15:36:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:01,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:02,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:02,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313057685] [2022-07-22 15:36:02,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313057685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:02,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383141030] [2022-07-22 15:36:02,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:36:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:02,376 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:02,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-22 15:36:02,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-22 15:36:02,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:02,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 15:36:02,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:03,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:03,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383141030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:03,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:03,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2022-07-22 15:36:03,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155572955] [2022-07-22 15:36:03,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:03,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-22 15:36:03,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-22 15:36:03,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=3259, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 15:36:03,524 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:04,124 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-07-22 15:36:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 15:36:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-22 15:36:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:04,125 INFO L225 Difference]: With dead ends: 95 [2022-07-22 15:36:04,125 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 15:36:04,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1557, Invalid=4449, Unknown=0, NotChecked=0, Total=6006 [2022-07-22 15:36:04,126 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 220 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:04,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 39 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 15:36:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-07-22 15:36:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-07-22 15:36:04,147 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 57 [2022-07-22 15:36:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:04,147 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-07-22 15:36:04,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:04,147 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-07-22 15:36:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 15:36:04,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:04,148 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:04,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:04,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-22 15:36:04,371 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash 224354145, now seen corresponding path program 19 times [2022-07-22 15:36:04,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:04,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905351463] [2022-07-22 15:36:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:04,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:04,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905351463] [2022-07-22 15:36:04,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905351463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589196508] [2022-07-22 15:36:04,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:36:04,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:04,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:04,851 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:04,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-22 15:36:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:04,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 15:36:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:05,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:06,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589196508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:06,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:06,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2022-07-22 15:36:06,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658885015] [2022-07-22 15:36:06,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:06,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-22 15:36:06,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:06,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-22 15:36:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=4086, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 15:36:06,206 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:07,797 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-07-22 15:36:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 15:36:07,797 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-22 15:36:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:07,798 INFO L225 Difference]: With dead ends: 163 [2022-07-22 15:36:07,798 INFO L226 Difference]: Without dead ends: 128 [2022-07-22 15:36:07,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1584, Invalid=6426, Unknown=0, NotChecked=0, Total=8010 [2022-07-22 15:36:07,799 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 169 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:07,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-22 15:36:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2022-07-22 15:36:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-07-22 15:36:07,824 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 59 [2022-07-22 15:36:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:07,824 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-07-22 15:36:07,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-07-22 15:36:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 15:36:07,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:07,825 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:07,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-22 15:36:08,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-22 15:36:08,027 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:08,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash 497266717, now seen corresponding path program 19 times [2022-07-22 15:36:08,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:08,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849429039] [2022-07-22 15:36:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:08,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:08,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:08,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849429039] [2022-07-22 15:36:08,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849429039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:08,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302542050] [2022-07-22 15:36:08,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:36:08,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:08,561 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:08,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-22 15:36:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:08,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 15:36:08,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:09,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:09,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302542050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:09,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:09,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 70 [2022-07-22 15:36:09,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834390689] [2022-07-22 15:36:09,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:09,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-22 15:36:09,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:09,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-22 15:36:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=886, Invalid=3944, Unknown=0, NotChecked=0, Total=4830 [2022-07-22 15:36:09,821 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:10,565 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-07-22 15:36:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 15:36:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-22 15:36:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:10,566 INFO L225 Difference]: With dead ends: 113 [2022-07-22 15:36:10,566 INFO L226 Difference]: Without dead ends: 107 [2022-07-22 15:36:10,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1876, Invalid=5606, Unknown=0, NotChecked=0, Total=7482 [2022-07-22 15:36:10,567 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:10,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 101 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-22 15:36:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2022-07-22 15:36:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-07-22 15:36:10,604 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 59 [2022-07-22 15:36:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:10,605 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-07-22 15:36:10,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-07-22 15:36:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 15:36:10,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:10,605 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:10,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:10,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-22 15:36:10,806 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:10,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1113957249, now seen corresponding path program 20 times [2022-07-22 15:36:10,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:10,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382514959] [2022-07-22 15:36:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:10,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:11,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:11,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382514959] [2022-07-22 15:36:11,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382514959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:11,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066333015] [2022-07-22 15:36:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:36:11,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:11,300 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:11,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-22 15:36:11,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:36:11,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:11,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 15:36:11,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:12,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:12,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066333015] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:12,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:12,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2022-07-22 15:36:12,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506173380] [2022-07-22 15:36:12,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:12,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-22 15:36:12,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:12,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-22 15:36:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=3808, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 15:36:12,597 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:13,525 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-07-22 15:36:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 15:36:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-22 15:36:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:13,526 INFO L225 Difference]: With dead ends: 127 [2022-07-22 15:36:13,526 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 15:36:13,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2836 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1479, Invalid=5661, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 15:36:13,527 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:13,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 126 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 15:36:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-07-22 15:36:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-07-22 15:36:13,553 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 61 [2022-07-22 15:36:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:13,553 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-07-22 15:36:13,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-07-22 15:36:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 15:36:13,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:13,554 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:13,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-22 15:36:13,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-22 15:36:13,755 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:13,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:13,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1463485663, now seen corresponding path program 20 times [2022-07-22 15:36:13,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:13,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53233075] [2022-07-22 15:36:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:13,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:14,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:14,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53233075] [2022-07-22 15:36:14,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53233075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:14,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844152545] [2022-07-22 15:36:14,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:36:14,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:14,299 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:14,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-22 15:36:14,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:36:14,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:14,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 15:36:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:15,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:15,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844152545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:15,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:15,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2022-07-22 15:36:15,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403006250] [2022-07-22 15:36:15,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-22 15:36:15,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-22 15:36:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=3797, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 15:36:15,543 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:16,177 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-07-22 15:36:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 15:36:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-22 15:36:16,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:16,178 INFO L225 Difference]: With dead ends: 101 [2022-07-22 15:36:16,178 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 15:36:16,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1802, Invalid=5170, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 15:36:16,179 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 130 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:16,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 70 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 15:36:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-07-22 15:36:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-07-22 15:36:16,208 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 61 [2022-07-22 15:36:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:16,208 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-07-22 15:36:16,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:16,209 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-07-22 15:36:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 15:36:16,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:16,209 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:16,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:16,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:16,410 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2063646399, now seen corresponding path program 21 times [2022-07-22 15:36:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:16,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482348560] [2022-07-22 15:36:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:16,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:16,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482348560] [2022-07-22 15:36:16,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482348560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349626444] [2022-07-22 15:36:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:36:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:16,941 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:16,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-22 15:36:16,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-22 15:36:16,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:16,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 15:36:16,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:17,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:18,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349626444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:18,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:18,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 76 [2022-07-22 15:36:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350474283] [2022-07-22 15:36:18,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:18,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-22 15:36:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-22 15:36:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=4687, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 15:36:18,485 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:19,979 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2022-07-22 15:36:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 15:36:19,979 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 15:36:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:19,980 INFO L225 Difference]: With dead ends: 173 [2022-07-22 15:36:19,980 INFO L226 Difference]: Without dead ends: 136 [2022-07-22 15:36:19,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3531 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1797, Invalid=7323, Unknown=0, NotChecked=0, Total=9120 [2022-07-22 15:36:19,981 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 341 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:19,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 106 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-22 15:36:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2022-07-22 15:36:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-07-22 15:36:20,006 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 63 [2022-07-22 15:36:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:20,006 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-07-22 15:36:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-07-22 15:36:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 15:36:20,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:20,006 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:20,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-22 15:36:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-22 15:36:20,207 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash -14509443, now seen corresponding path program 21 times [2022-07-22 15:36:20,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:20,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706957385] [2022-07-22 15:36:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:20,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:20,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706957385] [2022-07-22 15:36:20,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706957385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:20,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923777963] [2022-07-22 15:36:20,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:36:20,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:20,858 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:20,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-22 15:36:20,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-22 15:36:20,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:20,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 15:36:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:21,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:22,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923777963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:22,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:22,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 75 [2022-07-22 15:36:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275855974] [2022-07-22 15:36:22,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:22,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-22 15:36:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-22 15:36:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=4534, Unknown=0, NotChecked=0, Total=5550 [2022-07-22 15:36:22,282 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:23,037 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-07-22 15:36:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 15:36:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 15:36:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:23,038 INFO L225 Difference]: With dead ends: 119 [2022-07-22 15:36:23,038 INFO L226 Difference]: Without dead ends: 113 [2022-07-22 15:36:23,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3523 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2143, Invalid=6413, Unknown=0, NotChecked=0, Total=8556 [2022-07-22 15:36:23,039 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 314 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:23,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 69 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-22 15:36:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2022-07-22 15:36:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-07-22 15:36:23,069 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 63 [2022-07-22 15:36:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:23,069 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-07-22 15:36:23,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-07-22 15:36:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 15:36:23,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:23,070 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:23,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:23,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-22 15:36:23,270 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash 990392031, now seen corresponding path program 22 times [2022-07-22 15:36:23,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:23,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52645782] [2022-07-22 15:36:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:23,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:23,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:23,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52645782] [2022-07-22 15:36:23,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52645782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47904266] [2022-07-22 15:36:23,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:36:23,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:23,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:23,889 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:23,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-22 15:36:23,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:36:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 15:36:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:24,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:25,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47904266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:25,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:25,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2022-07-22 15:36:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058283606] [2022-07-22 15:36:25,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:25,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-22 15:36:25,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-22 15:36:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=4388, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 15:36:25,351 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:26,294 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2022-07-22 15:36:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 15:36:26,294 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-22 15:36:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:26,294 INFO L225 Difference]: With dead ends: 135 [2022-07-22 15:36:26,294 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 15:36:26,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3273 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1688, Invalid=6502, Unknown=0, NotChecked=0, Total=8190 [2022-07-22 15:36:26,295 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:26,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 111 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 15:36:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-07-22 15:36:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-07-22 15:36:26,321 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 65 [2022-07-22 15:36:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:26,321 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-07-22 15:36:26,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:26,322 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-07-22 15:36:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 15:36:26,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:26,322 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:26,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:26,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-22 15:36:26,523 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:26,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2056259649, now seen corresponding path program 22 times [2022-07-22 15:36:26,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:26,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280404074] [2022-07-22 15:36:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:26,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:27,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280404074] [2022-07-22 15:36:27,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280404074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574708428] [2022-07-22 15:36:27,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:36:27,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:27,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:27,153 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:27,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-22 15:36:27,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:36:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:27,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 15:36:27,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:27,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:28,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574708428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:28,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:28,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2022-07-22 15:36:28,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380642707] [2022-07-22 15:36:28,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:28,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-22 15:36:28,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:28,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-22 15:36:28,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=4376, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 15:36:28,583 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:29,271 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-07-22 15:36:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 15:36:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-22 15:36:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:29,272 INFO L225 Difference]: With dead ends: 107 [2022-07-22 15:36:29,272 INFO L226 Difference]: Without dead ends: 101 [2022-07-22 15:36:29,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2065, Invalid=5945, Unknown=0, NotChecked=0, Total=8010 [2022-07-22 15:36:29,273 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 336 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:29,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 63 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:29,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-22 15:36:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-07-22 15:36:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-07-22 15:36:29,306 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 65 [2022-07-22 15:36:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:29,306 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-07-22 15:36:29,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-07-22 15:36:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 15:36:29,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:29,307 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:29,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-22 15:36:29,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:29,530 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash -104661983, now seen corresponding path program 23 times [2022-07-22 15:36:29,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:29,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762478919] [2022-07-22 15:36:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:29,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:30,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762478919] [2022-07-22 15:36:30,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762478919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102606561] [2022-07-22 15:36:30,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:36:30,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:30,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:30,136 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:30,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-22 15:36:30,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-22 15:36:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 15:36:30,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:31,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:31,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102606561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:31,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:31,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 81 [2022-07-22 15:36:31,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537822977] [2022-07-22 15:36:31,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-22 15:36:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-22 15:36:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=5329, Unknown=0, NotChecked=0, Total=6480 [2022-07-22 15:36:31,873 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:33,507 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-07-22 15:36:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 15:36:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-22 15:36:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:33,512 INFO L225 Difference]: With dead ends: 183 [2022-07-22 15:36:33,512 INFO L226 Difference]: Without dead ends: 144 [2022-07-22 15:36:33,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2024, Invalid=8278, Unknown=0, NotChecked=0, Total=10302 [2022-07-22 15:36:33,513 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 149 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:33,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 163 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-22 15:36:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2022-07-22 15:36:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-07-22 15:36:33,553 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 67 [2022-07-22 15:36:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:33,553 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-07-22 15:36:33,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-07-22 15:36:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 15:36:33,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:33,554 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:33,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-22 15:36:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:33,763 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash -500875811, now seen corresponding path program 23 times [2022-07-22 15:36:33,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:33,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872503887] [2022-07-22 15:36:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:34,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872503887] [2022-07-22 15:36:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872503887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931159869] [2022-07-22 15:36:34,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:36:34,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:34,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:34,456 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:34,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-22 15:36:34,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-22 15:36:34,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:34,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 15:36:34,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:35,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:36,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931159869] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:36,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:36,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 80 [2022-07-22 15:36:36,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556526838] [2022-07-22 15:36:36,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:36,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-22 15:36:36,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-22 15:36:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=5165, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 15:36:36,010 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:36,881 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-07-22 15:36:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 15:36:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-22 15:36:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:36,882 INFO L225 Difference]: With dead ends: 125 [2022-07-22 15:36:36,882 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 15:36:36,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4024 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2428, Invalid=7274, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 15:36:36,883 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 283 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:36,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 89 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 15:36:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2022-07-22 15:36:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-07-22 15:36:36,921 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 67 [2022-07-22 15:36:36,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:36,921 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-07-22 15:36:36,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-07-22 15:36:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 15:36:36,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:36,922 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:36,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-22 15:36:37,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:37,147 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1743747647, now seen corresponding path program 24 times [2022-07-22 15:36:37,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:37,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10697733] [2022-07-22 15:36:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:37,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10697733] [2022-07-22 15:36:37,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10697733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006700256] [2022-07-22 15:36:37,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:36:37,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:37,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:37,828 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:37,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-22 15:36:37,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-22 15:36:37,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:37,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 15:36:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:38,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:39,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006700256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:39,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:39,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2022-07-22 15:36:39,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716728277] [2022-07-22 15:36:39,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:39,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-22 15:36:39,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-22 15:36:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=5009, Unknown=0, NotChecked=0, Total=6162 [2022-07-22 15:36:39,487 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:40,554 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2022-07-22 15:36:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 15:36:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 15:36:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:40,555 INFO L225 Difference]: With dead ends: 143 [2022-07-22 15:36:40,555 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 15:36:40,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1911, Invalid=7401, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 15:36:40,556 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:40,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 132 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 15:36:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-07-22 15:36:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-07-22 15:36:40,600 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 69 [2022-07-22 15:36:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:40,600 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-07-22 15:36:40,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-07-22 15:36:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 15:36:40,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:40,601 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:40,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:40,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-22 15:36:40,802 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:40,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1306018719, now seen corresponding path program 24 times [2022-07-22 15:36:40,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:40,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411872258] [2022-07-22 15:36:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:40,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:41,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411872258] [2022-07-22 15:36:41,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411872258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136746714] [2022-07-22 15:36:41,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:36:41,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:41,478 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:41,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-22 15:36:41,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-22 15:36:41,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:41,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 15:36:41,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:42,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:43,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136746714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:43,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:43,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2022-07-22 15:36:43,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624863206] [2022-07-22 15:36:43,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:43,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-22 15:36:43,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-22 15:36:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=4996, Unknown=0, NotChecked=0, Total=6162 [2022-07-22 15:36:43,006 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:43,773 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-07-22 15:36:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 15:36:43,773 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 15:36:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:43,774 INFO L225 Difference]: With dead ends: 113 [2022-07-22 15:36:43,774 INFO L226 Difference]: Without dead ends: 107 [2022-07-22 15:36:43,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2346, Invalid=6774, Unknown=0, NotChecked=0, Total=9120 [2022-07-22 15:36:43,774 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 312 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:43,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 38 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-22 15:36:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-07-22 15:36:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-07-22 15:36:43,816 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 69 [2022-07-22 15:36:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:43,816 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-07-22 15:36:43,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-07-22 15:36:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 15:36:43,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:43,817 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:43,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:44,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-22 15:36:44,031 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1229443073, now seen corresponding path program 25 times [2022-07-22 15:36:44,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:44,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164767366] [2022-07-22 15:36:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:44,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164767366] [2022-07-22 15:36:44,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164767366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517226486] [2022-07-22 15:36:44,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:36:44,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:44,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:44,723 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:44,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-22 15:36:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 15:36:44,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:45,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:46,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517226486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:46,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:46,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 86 [2022-07-22 15:36:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337843206] [2022-07-22 15:36:46,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:46,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-22 15:36:46,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:46,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-22 15:36:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=6012, Unknown=0, NotChecked=0, Total=7310 [2022-07-22 15:36:46,617 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:48,770 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2022-07-22 15:36:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 15:36:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-22 15:36:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:48,771 INFO L225 Difference]: With dead ends: 193 [2022-07-22 15:36:48,771 INFO L226 Difference]: Without dead ends: 152 [2022-07-22 15:36:48,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4536 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2265, Invalid=9291, Unknown=0, NotChecked=0, Total=11556 [2022-07-22 15:36:48,772 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 193 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:48,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 150 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-22 15:36:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2022-07-22 15:36:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-07-22 15:36:48,807 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 71 [2022-07-22 15:36:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:48,807 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-07-22 15:36:48,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-07-22 15:36:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 15:36:48,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:48,808 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:48,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-22 15:36:49,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-22 15:36:49,023 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:49,024 INFO L85 PathProgramCache]: Analyzing trace with hash 198236733, now seen corresponding path program 25 times [2022-07-22 15:36:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:49,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143823863] [2022-07-22 15:36:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:49,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:49,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143823863] [2022-07-22 15:36:49,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143823863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:49,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408900502] [2022-07-22 15:36:49,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:36:49,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:49,813 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:49,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-22 15:36:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:49,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 15:36:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:50,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:51,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408900502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:51,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:51,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 85 [2022-07-22 15:36:51,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995495111] [2022-07-22 15:36:51,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:51,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-22 15:36:51,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-22 15:36:51,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=5837, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 15:36:51,547 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:52,579 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-07-22 15:36:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 15:36:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-22 15:36:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:52,580 INFO L225 Difference]: With dead ends: 131 [2022-07-22 15:36:52,580 INFO L226 Difference]: Without dead ends: 125 [2022-07-22 15:36:52,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2731, Invalid=8189, Unknown=0, NotChecked=0, Total=10920 [2022-07-22 15:36:52,581 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 266 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:52,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 121 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-22 15:36:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2022-07-22 15:36:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-07-22 15:36:52,614 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 71 [2022-07-22 15:36:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:52,614 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-07-22 15:36:52,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-07-22 15:36:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 15:36:52,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:52,615 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:52,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-22 15:36:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-22 15:36:52,819 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash -718963041, now seen corresponding path program 26 times [2022-07-22 15:36:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140540331] [2022-07-22 15:36:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 198 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:53,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:53,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140540331] [2022-07-22 15:36:53,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140540331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:53,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525109016] [2022-07-22 15:36:53,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:36:53,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:53,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:53,444 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:53,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-22 15:36:53,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:36:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 15:36:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:54,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:55,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525109016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:55,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:55,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2022-07-22 15:36:55,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551503154] [2022-07-22 15:36:55,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:55,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-22 15:36:55,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-22 15:36:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=5671, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 15:36:55,216 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:56,391 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-07-22 15:36:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 15:36:56,391 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-22 15:36:56,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:56,392 INFO L225 Difference]: With dead ends: 151 [2022-07-22 15:36:56,392 INFO L226 Difference]: Without dead ends: 110 [2022-07-22 15:36:56,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4240 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2148, Invalid=8358, Unknown=0, NotChecked=0, Total=10506 [2022-07-22 15:36:56,392 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:56,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 118 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-22 15:36:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-07-22 15:36:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-07-22 15:36:56,426 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 73 [2022-07-22 15:36:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:56,426 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-07-22 15:36:56,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-07-22 15:36:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 15:36:56,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:56,427 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:56,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-22 15:36:56,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-22 15:36:56,627 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2052139135, now seen corresponding path program 26 times [2022-07-22 15:36:56,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:56,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182592101] [2022-07-22 15:36:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:56,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 169 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:57,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182592101] [2022-07-22 15:36:57,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182592101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947256209] [2022-07-22 15:36:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:36:57,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:57,526 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:36:57,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-22 15:36:57,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:36:57,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 15:36:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:59,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947256209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:59,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:59,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2022-07-22 15:36:59,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291904479] [2022-07-22 15:36:59,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:59,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-22 15:36:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-22 15:36:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=5657, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 15:36:59,181 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:59,977 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-07-22 15:36:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 15:36:59,977 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-22 15:36:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:59,978 INFO L225 Difference]: With dead ends: 119 [2022-07-22 15:36:59,978 INFO L226 Difference]: Without dead ends: 113 [2022-07-22 15:36:59,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4361 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2645, Invalid=7657, Unknown=0, NotChecked=0, Total=10302 [2022-07-22 15:36:59,979 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 232 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:59,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 70 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:36:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-22 15:37:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-07-22 15:37:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-07-22 15:37:00,030 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 73 [2022-07-22 15:37:00,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:00,030 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-07-22 15:37:00,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-07-22 15:37:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 15:37:00,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:00,031 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:00,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-22 15:37:00,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-22 15:37:00,245 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash 991624417, now seen corresponding path program 27 times [2022-07-22 15:37:00,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:00,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274162172] [2022-07-22 15:37:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:00,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:01,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274162172] [2022-07-22 15:37:01,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274162172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039105206] [2022-07-22 15:37:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:37:01,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:01,019 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:01,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-22 15:37:01,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-22 15:37:01,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:01,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 15:37:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:02,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:03,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039105206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:03,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:03,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2022-07-22 15:37:03,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559217833] [2022-07-22 15:37:03,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:03,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-22 15:37:03,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-22 15:37:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1454, Invalid=6736, Unknown=0, NotChecked=0, Total=8190 [2022-07-22 15:37:03,082 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:05,288 INFO L93 Difference]: Finished difference Result 203 states and 208 transitions. [2022-07-22 15:37:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 15:37:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 15:37:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:05,289 INFO L225 Difference]: With dead ends: 203 [2022-07-22 15:37:05,289 INFO L226 Difference]: Without dead ends: 160 [2022-07-22 15:37:05,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2520, Invalid=10362, Unknown=0, NotChecked=0, Total=12882 [2022-07-22 15:37:05,290 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 248 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:05,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 152 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-22 15:37:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2022-07-22 15:37:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-07-22 15:37:05,344 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 75 [2022-07-22 15:37:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:05,344 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-07-22 15:37:05,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-07-22 15:37:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 15:37:05,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:05,345 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:05,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-22 15:37:05,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:05,559 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash -382029923, now seen corresponding path program 27 times [2022-07-22 15:37:05,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:05,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648591647] [2022-07-22 15:37:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:06,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:06,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648591647] [2022-07-22 15:37:06,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648591647] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:06,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521981848] [2022-07-22 15:37:06,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:37:06,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:06,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:06,478 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:06,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-22 15:37:06,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-22 15:37:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:06,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 15:37:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:07,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:08,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521981848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:08,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:08,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 90 [2022-07-22 15:37:08,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245968689] [2022-07-22 15:37:08,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:08,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-22 15:37:08,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:08,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-22 15:37:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=6550, Unknown=0, NotChecked=0, Total=8010 [2022-07-22 15:37:08,432 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:09,408 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-07-22 15:37:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 15:37:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 15:37:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:09,409 INFO L225 Difference]: With dead ends: 137 [2022-07-22 15:37:09,409 INFO L226 Difference]: Without dead ends: 131 [2022-07-22 15:37:09,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5125 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3052, Invalid=9158, Unknown=0, NotChecked=0, Total=12210 [2022-07-22 15:37:09,410 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 234 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:09,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 79 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-22 15:37:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2022-07-22 15:37:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-07-22 15:37:09,451 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 75 [2022-07-22 15:37:09,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:09,451 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-07-22 15:37:09,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:09,451 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-07-22 15:37:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 15:37:09,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:09,452 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:09,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-22 15:37:09,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:09,652 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:09,653 INFO L85 PathProgramCache]: Analyzing trace with hash -9470977, now seen corresponding path program 28 times [2022-07-22 15:37:09,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:09,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965245138] [2022-07-22 15:37:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:09,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 227 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:10,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:10,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965245138] [2022-07-22 15:37:10,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965245138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:10,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043993373] [2022-07-22 15:37:10,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:37:10,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:10,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:10,314 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:10,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-22 15:37:10,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:37:10,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 15:37:10,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:11,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:12,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043993373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:12,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:12,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2022-07-22 15:37:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975414194] [2022-07-22 15:37:12,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:12,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-22 15:37:12,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-22 15:37:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1458, Invalid=6374, Unknown=0, NotChecked=0, Total=7832 [2022-07-22 15:37:12,321 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:13,611 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2022-07-22 15:37:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 15:37:13,611 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-22 15:37:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:13,611 INFO L225 Difference]: With dead ends: 159 [2022-07-22 15:37:13,612 INFO L226 Difference]: Without dead ends: 116 [2022-07-22 15:37:13,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4770 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2399, Invalid=9373, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 15:37:13,612 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 86 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:13,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 113 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-22 15:37:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-07-22 15:37:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-07-22 15:37:13,650 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 77 [2022-07-22 15:37:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:13,650 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-07-22 15:37:13,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-07-22 15:37:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 15:37:13,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:13,651 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:13,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-22 15:37:13,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:13,855 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:13,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1633163681, now seen corresponding path program 28 times [2022-07-22 15:37:13,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:13,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355444321] [2022-07-22 15:37:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:13,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 196 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:14,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:14,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355444321] [2022-07-22 15:37:14,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355444321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:14,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236453224] [2022-07-22 15:37:14,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:37:14,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:14,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:14,714 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:14,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-22 15:37:14,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:37:14,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:14,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 15:37:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:15,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:16,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236453224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:16,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:16,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2022-07-22 15:37:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690476170] [2022-07-22 15:37:16,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:16,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-22 15:37:16,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-22 15:37:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=6359, Unknown=0, NotChecked=0, Total=7832 [2022-07-22 15:37:16,521 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:17,446 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-07-22 15:37:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 15:37:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-22 15:37:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:17,447 INFO L225 Difference]: With dead ends: 125 [2022-07-22 15:37:17,447 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 15:37:17,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4915 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2962, Invalid=8594, Unknown=0, NotChecked=0, Total=11556 [2022-07-22 15:37:17,448 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 237 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:17,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 88 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:17,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 15:37:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-07-22 15:37:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-07-22 15:37:17,489 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 77 [2022-07-22 15:37:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:17,490 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-07-22 15:37:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-07-22 15:37:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 15:37:17,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:17,491 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:17,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-22 15:37:17,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-07-22 15:37:17,703 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1531329855, now seen corresponding path program 29 times [2022-07-22 15:37:17,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:17,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638574008] [2022-07-22 15:37:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:17,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:18,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:18,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638574008] [2022-07-22 15:37:18,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638574008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399482365] [2022-07-22 15:37:18,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:37:18,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:18,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:18,445 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:18,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-22 15:37:18,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-22 15:37:18,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:18,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 15:37:18,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:19,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:20,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399482365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:20,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:20,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 96 [2022-07-22 15:37:20,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42511920] [2022-07-22 15:37:20,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-22 15:37:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-22 15:37:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1619, Invalid=7501, Unknown=0, NotChecked=0, Total=9120 [2022-07-22 15:37:20,664 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:22,690 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2022-07-22 15:37:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 15:37:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-22 15:37:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:22,692 INFO L225 Difference]: With dead ends: 213 [2022-07-22 15:37:22,692 INFO L226 Difference]: Without dead ends: 168 [2022-07-22 15:37:22,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5665 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2789, Invalid=11491, Unknown=0, NotChecked=0, Total=14280 [2022-07-22 15:37:22,693 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 204 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:22,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 176 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:37:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-22 15:37:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2022-07-22 15:37:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-07-22 15:37:22,744 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 79 [2022-07-22 15:37:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:22,745 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-07-22 15:37:22,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-07-22 15:37:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 15:37:22,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:22,745 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:22,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-22 15:37:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-22 15:37:22,946 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1285030403, now seen corresponding path program 29 times [2022-07-22 15:37:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856209858] [2022-07-22 15:37:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:23,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:23,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856209858] [2022-07-22 15:37:23,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856209858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:23,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827169297] [2022-07-22 15:37:23,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:37:23,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:23,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:23,793 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:23,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-22 15:37:23,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-22 15:37:23,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 15:37:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:24,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:25,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827169297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:25,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:25,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 95 [2022-07-22 15:37:25,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179670714] [2022-07-22 15:37:25,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:25,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-22 15:37:25,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:25,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-22 15:37:25,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2022-07-22 15:37:25,770 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:26,822 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-07-22 15:37:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-22 15:37:26,822 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-22 15:37:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:26,823 INFO L225 Difference]: With dead ends: 143 [2022-07-22 15:37:26,823 INFO L226 Difference]: Without dead ends: 137 [2022-07-22 15:37:26,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5725 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3391, Invalid=10181, Unknown=0, NotChecked=0, Total=13572 [2022-07-22 15:37:26,824 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 286 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:26,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 105 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-22 15:37:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 122. [2022-07-22 15:37:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-07-22 15:37:26,869 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 79 [2022-07-22 15:37:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:26,869 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-07-22 15:37:26,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-07-22 15:37:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 15:37:26,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:26,870 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:26,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-07-22 15:37:27,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:27,071 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -209538465, now seen corresponding path program 30 times [2022-07-22 15:37:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:27,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433713232] [2022-07-22 15:37:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:27,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 258 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:27,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:27,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433713232] [2022-07-22 15:37:27,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433713232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:27,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164386713] [2022-07-22 15:37:27,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:37:27,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:27,784 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:27,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-22 15:37:27,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-22 15:37:27,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:27,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 15:37:27,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:29,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:30,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164386713] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:30,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:30,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 94 [2022-07-22 15:37:30,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349341269] [2022-07-22 15:37:30,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:30,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-07-22 15:37:30,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:30,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-07-22 15:37:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1624, Invalid=7118, Unknown=0, NotChecked=0, Total=8742 [2022-07-22 15:37:30,068 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:31,497 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2022-07-22 15:37:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 15:37:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-22 15:37:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:31,498 INFO L225 Difference]: With dead ends: 167 [2022-07-22 15:37:31,498 INFO L226 Difference]: Without dead ends: 122 [2022-07-22 15:37:31,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5331 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2664, Invalid=10446, Unknown=0, NotChecked=0, Total=13110 [2022-07-22 15:37:31,499 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 95 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:31,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 128 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-22 15:37:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-07-22 15:37:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-07-22 15:37:31,553 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 81 [2022-07-22 15:37:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:31,553 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-07-22 15:37:31,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-07-22 15:37:31,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 15:37:31,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:31,553 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:31,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-07-22 15:37:31,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:31,754 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1016708415, now seen corresponding path program 30 times [2022-07-22 15:37:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:31,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561917613] [2022-07-22 15:37:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:31,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 225 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:32,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561917613] [2022-07-22 15:37:32,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561917613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:32,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676330466] [2022-07-22 15:37:32,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:37:32,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:32,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:32,675 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:32,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-22 15:37:32,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-22 15:37:32,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:32,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 15:37:32,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:33,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:34,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676330466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:34,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:34,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 94 [2022-07-22 15:37:34,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697083963] [2022-07-22 15:37:34,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:34,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-07-22 15:37:34,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:34,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-07-22 15:37:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1640, Invalid=7102, Unknown=0, NotChecked=0, Total=8742 [2022-07-22 15:37:34,723 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:35,719 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-07-22 15:37:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 15:37:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-22 15:37:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:35,720 INFO L225 Difference]: With dead ends: 131 [2022-07-22 15:37:35,720 INFO L226 Difference]: Without dead ends: 125 [2022-07-22 15:37:35,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5502 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3297, Invalid=9585, Unknown=0, NotChecked=0, Total=12882 [2022-07-22 15:37:35,721 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 311 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:35,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 70 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-22 15:37:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-07-22 15:37:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-07-22 15:37:35,764 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 81 [2022-07-22 15:37:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:35,764 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-07-22 15:37:35,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-07-22 15:37:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 15:37:35,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:35,765 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:35,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-22 15:37:35,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-22 15:37:35,967 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1919852127, now seen corresponding path program 31 times [2022-07-22 15:37:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:35,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298830537] [2022-07-22 15:37:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:36,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:36,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298830537] [2022-07-22 15:37:36,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298830537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:36,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478394891] [2022-07-22 15:37:36,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:37:36,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:36,785 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:36,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-22 15:37:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:36,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 15:37:36,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:38,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:39,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478394891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:39,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:39,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 101 [2022-07-22 15:37:39,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025259962] [2022-07-22 15:37:39,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:39,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-22 15:37:39,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:39,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-22 15:37:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1793, Invalid=8307, Unknown=0, NotChecked=0, Total=10100 [2022-07-22 15:37:39,251 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:41,523 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2022-07-22 15:37:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-22 15:37:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-07-22 15:37:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:41,524 INFO L225 Difference]: With dead ends: 223 [2022-07-22 15:37:41,524 INFO L226 Difference]: Without dead ends: 176 [2022-07-22 15:37:41,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6276 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3072, Invalid=12678, Unknown=0, NotChecked=0, Total=15750 [2022-07-22 15:37:41,525 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 295 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:41,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 117 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:37:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-22 15:37:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2022-07-22 15:37:41,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-07-22 15:37:41,573 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 83 [2022-07-22 15:37:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:41,574 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-07-22 15:37:41,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-07-22 15:37:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 15:37:41,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:41,575 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:41,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-22 15:37:41,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-22 15:37:41,781 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:41,781 INFO L85 PathProgramCache]: Analyzing trace with hash 323880285, now seen corresponding path program 31 times [2022-07-22 15:37:41,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:41,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731318278] [2022-07-22 15:37:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:41,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:42,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731318278] [2022-07-22 15:37:42,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731318278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762489980] [2022-07-22 15:37:42,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:37:42,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:42,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:42,750 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:42,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-22 15:37:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 15:37:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:44,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762489980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:44,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:44,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 100 [2022-07-22 15:37:44,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122570826] [2022-07-22 15:37:44,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:44,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-07-22 15:37:44,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:44,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-07-22 15:37:44,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1801, Invalid=8099, Unknown=0, NotChecked=0, Total=9900 [2022-07-22 15:37:44,975 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:46,161 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-07-22 15:37:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 15:37:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-07-22 15:37:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:46,162 INFO L225 Difference]: With dead ends: 149 [2022-07-22 15:37:46,162 INFO L226 Difference]: Without dead ends: 143 [2022-07-22 15:37:46,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6358 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3748, Invalid=11258, Unknown=0, NotChecked=0, Total=15006 [2022-07-22 15:37:46,163 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 329 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:46,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 119 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-22 15:37:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2022-07-22 15:37:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-07-22 15:37:46,225 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 83 [2022-07-22 15:37:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:46,225 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-07-22 15:37:46,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-07-22 15:37:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 15:37:46,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:46,225 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:46,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-22 15:37:46,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:46,426 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash -234593857, now seen corresponding path program 32 times [2022-07-22 15:37:46,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:46,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340709071] [2022-07-22 15:37:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:46,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 291 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:47,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340709071] [2022-07-22 15:37:47,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340709071] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294769184] [2022-07-22 15:37:47,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:37:47,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:47,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:47,208 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:47,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-22 15:37:47,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:37:47,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:47,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 15:37:47,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:48,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:49,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294769184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:49,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:49,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 99 [2022-07-22 15:37:49,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524429622] [2022-07-22 15:37:49,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:49,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-22 15:37:49,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:49,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-22 15:37:49,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 15:37:49,551 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:50,964 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-07-22 15:37:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 15:37:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-22 15:37:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:50,965 INFO L225 Difference]: With dead ends: 175 [2022-07-22 15:37:50,965 INFO L226 Difference]: Without dead ends: 128 [2022-07-22 15:37:50,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5923 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2943, Invalid=11577, Unknown=0, NotChecked=0, Total=14520 [2022-07-22 15:37:50,966 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 177 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:50,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 61 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:37:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-22 15:37:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-07-22 15:37:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-07-22 15:37:51,017 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 85 [2022-07-22 15:37:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:51,017 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-07-22 15:37:51,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-07-22 15:37:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 15:37:51,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:51,017 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:51,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-22 15:37:51,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-22 15:37:51,218 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash -405541601, now seen corresponding path program 32 times [2022-07-22 15:37:51,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:51,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848552814] [2022-07-22 15:37:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 256 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:52,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:52,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848552814] [2022-07-22 15:37:52,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848552814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:52,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520883155] [2022-07-22 15:37:52,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:37:52,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:52,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:52,164 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:52,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-22 15:37:52,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:37:52,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 15:37:52,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:53,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:54,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520883155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:54,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:54,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 99 [2022-07-22 15:37:54,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611721163] [2022-07-22 15:37:54,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:54,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-22 15:37:54,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:54,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-22 15:37:54,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 15:37:54,339 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:55,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:37:55,382 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-07-22 15:37:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-22 15:37:55,382 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-22 15:37:55,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:37:55,383 INFO L225 Difference]: With dead ends: 137 [2022-07-22 15:37:55,383 INFO L226 Difference]: Without dead ends: 131 [2022-07-22 15:37:55,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6122 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3650, Invalid=10630, Unknown=0, NotChecked=0, Total=14280 [2022-07-22 15:37:55,384 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 428 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:37:55,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 56 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:37:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-22 15:37:55,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-07-22 15:37:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-07-22 15:37:55,436 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 85 [2022-07-22 15:37:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:37:55,436 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-07-22 15:37:55,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:37:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-07-22 15:37:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 15:37:55,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:37:55,437 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:37:55,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-22 15:37:55,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:55,651 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:37:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:37:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1392449921, now seen corresponding path program 33 times [2022-07-22 15:37:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:37:55,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618206138] [2022-07-22 15:37:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:37:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:37:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:37:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:56,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:37:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618206138] [2022-07-22 15:37:56,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618206138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:37:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538097656] [2022-07-22 15:37:56,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:37:56,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:37:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:37:56,518 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:37:56,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-22 15:37:56,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-22 15:37:56,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:37:56,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 15:37:56,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:37:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:58,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:37:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:37:59,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538097656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:37:59,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:37:59,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 106 [2022-07-22 15:37:59,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549956088] [2022-07-22 15:37:59,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:37:59,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-22 15:37:59,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:37:59,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-22 15:37:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1976, Invalid=9154, Unknown=0, NotChecked=0, Total=11130 [2022-07-22 15:37:59,176 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:01,680 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2022-07-22 15:38:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 15:38:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-22 15:38:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:01,681 INFO L225 Difference]: With dead ends: 233 [2022-07-22 15:38:01,681 INFO L226 Difference]: Without dead ends: 184 [2022-07-22 15:38:01,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6918 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3369, Invalid=13923, Unknown=0, NotChecked=0, Total=17292 [2022-07-22 15:38:01,682 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 197 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:01,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 195 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:38:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-22 15:38:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 132. [2022-07-22 15:38:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-07-22 15:38:01,741 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 87 [2022-07-22 15:38:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:01,741 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-07-22 15:38:01,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-07-22 15:38:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 15:38:01,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:01,742 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:01,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-22 15:38:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:01,959 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash -976091715, now seen corresponding path program 33 times [2022-07-22 15:38:01,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:01,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13679148] [2022-07-22 15:38:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:02,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13679148] [2022-07-22 15:38:02,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13679148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487571614] [2022-07-22 15:38:02,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:38:02,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:02,990 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:38:02,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-22 15:38:03,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-22 15:38:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 15:38:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:04,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:05,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487571614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:05,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:38:05,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 105 [2022-07-22 15:38:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739173175] [2022-07-22 15:38:05,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:05,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-22 15:38:05,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-22 15:38:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1985, Invalid=8935, Unknown=0, NotChecked=0, Total=10920 [2022-07-22 15:38:05,426 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:06,716 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-07-22 15:38:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 15:38:06,716 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-22 15:38:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:06,716 INFO L225 Difference]: With dead ends: 155 [2022-07-22 15:38:06,716 INFO L226 Difference]: Without dead ends: 149 [2022-07-22 15:38:06,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7024 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4123, Invalid=12389, Unknown=0, NotChecked=0, Total=16512 [2022-07-22 15:38:06,717 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 297 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:06,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 126 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:38:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-22 15:38:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 134. [2022-07-22 15:38:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-07-22 15:38:06,796 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 87 [2022-07-22 15:38:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:06,797 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-07-22 15:38:06,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-07-22 15:38:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 15:38:06,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:06,798 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:06,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-07-22 15:38:07,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-07-22 15:38:07,021 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:07,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:07,022 INFO L85 PathProgramCache]: Analyzing trace with hash 327797279, now seen corresponding path program 34 times [2022-07-22 15:38:07,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:07,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292511954] [2022-07-22 15:38:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:07,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 326 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292511954] [2022-07-22 15:38:07,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292511954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894777899] [2022-07-22 15:38:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:38:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:07,843 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:38:07,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-22 15:38:07,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:38:07,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 15:38:07,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:09,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:10,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894777899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:10,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:38:10,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2022-07-22 15:38:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593934667] [2022-07-22 15:38:10,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:10,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-22 15:38:10,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-22 15:38:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=8729, Unknown=0, NotChecked=0, Total=10712 [2022-07-22 15:38:10,390 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:12,006 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2022-07-22 15:38:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 15:38:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-07-22 15:38:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:12,007 INFO L225 Difference]: With dead ends: 183 [2022-07-22 15:38:12,007 INFO L226 Difference]: Without dead ends: 134 [2022-07-22 15:38:12,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6546 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3236, Invalid=12766, Unknown=0, NotChecked=0, Total=16002 [2022-07-22 15:38:12,009 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 147 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:12,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 132 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:38:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-22 15:38:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-07-22 15:38:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-07-22 15:38:12,084 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 89 [2022-07-22 15:38:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:12,084 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-07-22 15:38:12,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-07-22 15:38:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 15:38:12,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:12,085 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:12,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-22 15:38:12,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:12,299 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1777579519, now seen corresponding path program 34 times [2022-07-22 15:38:12,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:12,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297001824] [2022-07-22 15:38:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:12,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 289 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:13,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297001824] [2022-07-22 15:38:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297001824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98696169] [2022-07-22 15:38:13,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:38:13,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:13,471 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:38:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-22 15:38:13,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:38:13,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 15:38:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:14,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:15,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98696169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:15,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:38:15,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2022-07-22 15:38:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443422122] [2022-07-22 15:38:15,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:15,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-22 15:38:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-22 15:38:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2001, Invalid=8711, Unknown=0, NotChecked=0, Total=10712 [2022-07-22 15:38:15,781 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:16,922 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-07-22 15:38:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 15:38:16,922 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-07-22 15:38:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:16,923 INFO L225 Difference]: With dead ends: 143 [2022-07-22 15:38:16,923 INFO L226 Difference]: Without dead ends: 137 [2022-07-22 15:38:16,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6775 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4021, Invalid=11729, Unknown=0, NotChecked=0, Total=15750 [2022-07-22 15:38:16,924 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 286 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:16,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 89 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:38:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-22 15:38:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-07-22 15:38:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-07-22 15:38:16,982 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 89 [2022-07-22 15:38:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:16,982 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-07-22 15:38:16,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-07-22 15:38:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 15:38:16,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:16,983 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:16,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-07-22 15:38:17,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:17,184 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash -867161503, now seen corresponding path program 35 times [2022-07-22 15:38:17,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:17,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166508943] [2022-07-22 15:38:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:17,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:18,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166508943] [2022-07-22 15:38:18,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166508943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200643401] [2022-07-22 15:38:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:38:18,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:18,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:18,092 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:38:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-22 15:38:18,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-22 15:38:18,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:18,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 15:38:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:19,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:20,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200643401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:20,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:38:20,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 111 [2022-07-22 15:38:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765526687] [2022-07-22 15:38:20,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:20,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-07-22 15:38:20,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-07-22 15:38:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2168, Invalid=10042, Unknown=0, NotChecked=0, Total=12210 [2022-07-22 15:38:20,875 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:23,494 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2022-07-22 15:38:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-22 15:38:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-22 15:38:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:23,496 INFO L225 Difference]: With dead ends: 243 [2022-07-22 15:38:23,496 INFO L226 Difference]: Without dead ends: 192 [2022-07-22 15:38:23,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7591 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3680, Invalid=15226, Unknown=0, NotChecked=0, Total=18906 [2022-07-22 15:38:23,497 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 206 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:23,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 212 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:38:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-22 15:38:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2022-07-22 15:38:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-07-22 15:38:23,558 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 91 [2022-07-22 15:38:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:23,558 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-07-22 15:38:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-07-22 15:38:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 15:38:23,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:23,559 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:23,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-07-22 15:38:23,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:23,760 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1070153501, now seen corresponding path program 35 times [2022-07-22 15:38:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:23,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629593242] [2022-07-22 15:38:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:24,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:24,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629593242] [2022-07-22 15:38:24,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629593242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:24,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359490323] [2022-07-22 15:38:24,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:38:24,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:24,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:24,845 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:38:24,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-22 15:38:24,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-22 15:38:24,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 15:38:24,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:26,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:27,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359490323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:27,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:38:27,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 110 [2022-07-22 15:38:27,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489166738] [2022-07-22 15:38:27,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:27,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-07-22 15:38:27,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:27,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-07-22 15:38:27,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2178, Invalid=9812, Unknown=0, NotChecked=0, Total=11990 [2022-07-22 15:38:27,372 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:28,650 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-07-22 15:38:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 15:38:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-22 15:38:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:28,651 INFO L225 Difference]: With dead ends: 161 [2022-07-22 15:38:28,651 INFO L226 Difference]: Without dead ends: 155 [2022-07-22 15:38:28,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7723 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4516, Invalid=13574, Unknown=0, NotChecked=0, Total=18090 [2022-07-22 15:38:28,652 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 274 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:28,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 118 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:38:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-22 15:38:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2022-07-22 15:38:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-07-22 15:38:28,736 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 91 [2022-07-22 15:38:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:28,737 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-07-22 15:38:28,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-07-22 15:38:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 15:38:28,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:28,738 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:28,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-22 15:38:28,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-07-22 15:38:28,961 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash -325571713, now seen corresponding path program 36 times [2022-07-22 15:38:28,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:28,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571343660] [2022-07-22 15:38:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:28,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 363 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:29,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571343660] [2022-07-22 15:38:29,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571343660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987752136] [2022-07-22 15:38:29,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:38:29,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:29,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:29,824 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:38:29,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-22 15:38:29,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-22 15:38:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 15:38:29,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:31,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:32,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987752136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:32,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:38:32,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 109 [2022-07-22 15:38:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284113041] [2022-07-22 15:38:32,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:32,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-07-22 15:38:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-07-22 15:38:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2176, Invalid=9596, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 15:38:32,498 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:34,170 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2022-07-22 15:38:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-22 15:38:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-22 15:38:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:34,171 INFO L225 Difference]: With dead ends: 191 [2022-07-22 15:38:34,171 INFO L226 Difference]: Without dead ends: 140 [2022-07-22 15:38:34,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7200 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3543, Invalid=14013, Unknown=0, NotChecked=0, Total=17556 [2022-07-22 15:38:34,172 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:34,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 146 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:38:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-22 15:38:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-07-22 15:38:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-07-22 15:38:34,232 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 93 [2022-07-22 15:38:34,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:34,232 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-07-22 15:38:34,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-07-22 15:38:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 15:38:34,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:34,233 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:34,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-07-22 15:38:34,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:34,443 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash -427403297, now seen corresponding path program 36 times [2022-07-22 15:38:34,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:34,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968254254] [2022-07-22 15:38:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:34,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 324 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:35,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:35,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968254254] [2022-07-22 15:38:35,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968254254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:35,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271665322] [2022-07-22 15:38:35,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:38:35,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:35,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:35,528 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:38:35,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-22 15:38:35,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-22 15:38:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:35,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 15:38:35,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:36,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:37,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271665322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:37,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:38:37,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 109 [2022-07-22 15:38:37,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379893727] [2022-07-22 15:38:37,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:37,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-07-22 15:38:37,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-07-22 15:38:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=9577, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 15:38:37,999 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:39,159 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-07-22 15:38:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 15:38:39,160 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-22 15:38:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:39,160 INFO L225 Difference]: With dead ends: 149 [2022-07-22 15:38:39,160 INFO L226 Difference]: Without dead ends: 143 [2022-07-22 15:38:39,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7461 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4410, Invalid=12882, Unknown=0, NotChecked=0, Total=17292 [2022-07-22 15:38:39,161 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 236 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:39,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 81 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:38:39,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-22 15:38:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-07-22 15:38:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-07-22 15:38:39,223 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 93 [2022-07-22 15:38:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:39,223 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-07-22 15:38:39,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-07-22 15:38:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 15:38:39,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:39,224 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:39,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-07-22 15:38:39,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:39,424 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:39,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1858196545, now seen corresponding path program 37 times [2022-07-22 15:38:39,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:39,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741639248] [2022-07-22 15:38:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:39,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:40,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:40,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741639248] [2022-07-22 15:38:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741639248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739252938] [2022-07-22 15:38:40,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:38:40,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:40,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:40,350 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:38:40,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-22 15:38:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 15:38:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:42,121 INFO L328 TraceCheckSpWp]: Computing backward predicates...