./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/eca-rers2012/Problem03_label13.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 67239f1bf7e0cdf325715bd48f4c9c86a0588f752ce48acb5db8e3f7bfd7cd18 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:46:24,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:46:24,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:46:24,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:46:24,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:46:24,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:46:24,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:46:24,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:46:24,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:46:24,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:46:24,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:46:24,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:46:24,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:46:24,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:46:24,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:46:24,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:46:24,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:46:24,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:46:24,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:46:24,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:46:24,540 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:46:24,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:46:24,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:46:24,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:46:24,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:46:24,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:46:24,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:46:24,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:46:24,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:46:24,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:46:24,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:46:24,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:46:24,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:46:24,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:46:24,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:46:24,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:46:24,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:46:24,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:46:24,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:46:24,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:46:24,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:46:24,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:46:24,557 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:46:24,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:46:24,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:46:24,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:46:24,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:46:24,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:46:24,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:46:24,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:46:24,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:46:24,580 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:46:24,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:46:24,581 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:46:24,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:46:24,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:46:24,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:46:24,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:46:24,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:46:24,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:46:24,582 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:46:24,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:46:24,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:46:24,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:46:24,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:46:24,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:46:24,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:46:24,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:46:24,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:46:24,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:46:24,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:46:24,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:46:24,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:46:24,585 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:46:24,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:46:24,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:46:24,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67239f1bf7e0cdf325715bd48f4c9c86a0588f752ce48acb5db8e3f7bfd7cd18 [2022-07-13 11:46:24,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:46:24,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:46:24,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:46:24,791 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:46:24,791 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:46:24,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2022-07-13 11:46:24,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86b129997/9c8cda984d2b40bdad17a694b4bcfdc3/FLAGa885f44fb [2022-07-13 11:46:25,359 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:46:25,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2022-07-13 11:46:25,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86b129997/9c8cda984d2b40bdad17a694b4bcfdc3/FLAGa885f44fb [2022-07-13 11:46:25,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86b129997/9c8cda984d2b40bdad17a694b4bcfdc3 [2022-07-13 11:46:25,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:46:25,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:46:25,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:46:25,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:46:25,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:46:25,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:46:25" (1/1) ... [2022-07-13 11:46:25,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dcdc28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:25, skipping insertion in model container [2022-07-13 11:46:25,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:46:25" (1/1) ... [2022-07-13 11:46:25,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:46:25,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:46:26,338 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/eca-rers2012/Problem03_label13.c[55139,55152] [2022-07-13 11:46:26,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:46:26,372 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:46:26,515 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/eca-rers2012/Problem03_label13.c[55139,55152] [2022-07-13 11:46:26,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:46:26,537 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:46:26,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26 WrapperNode [2022-07-13 11:46:26,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:46:26,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:46:26,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:46:26,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:46:26,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,650 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-13 11:46:26,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:46:26,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:46:26,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:46:26,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:46:26,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:46:26,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:46:26,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:46:26,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:46:26,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (1/1) ... [2022-07-13 11:46:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:46:26,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:46:26,764 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) [2022-07-13 11:46:26,769 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 [2022-07-13 11:46:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:46:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:46:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:46:26,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:46:26,877 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:46:26,878 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:46:27,859 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:46:27,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:46:27,869 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:46:27,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:46:27 BoogieIcfgContainer [2022-07-13 11:46:27,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:46:27,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:46:27,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:46:27,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:46:27,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:46:25" (1/3) ... [2022-07-13 11:46:27,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e44d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:46:27, skipping insertion in model container [2022-07-13 11:46:27,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:46:26" (2/3) ... [2022-07-13 11:46:27,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e44d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:46:27, skipping insertion in model container [2022-07-13 11:46:27,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:46:27" (3/3) ... [2022-07-13 11:46:27,877 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2022-07-13 11:46:27,886 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:46:27,887 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:46:27,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:46:27,934 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@49f4f86d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@592e04c2 [2022-07-13 11:46:27,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:46:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-13 11:46:27,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:27,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:27,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:27,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:27,965 INFO L85 PathProgramCache]: Analyzing trace with hash -233001789, now seen corresponding path program 1 times [2022-07-13 11:46:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:27,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037229796] [2022-07-13 11:46:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:27,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:46:28,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037229796] [2022-07-13 11:46:28,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037229796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:28,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:28,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:46:28,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192285423] [2022-07-13 11:46:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:28,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:28,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:28,461 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:29,271 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2022-07-13 11:46:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2022-07-13 11:46:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:29,283 INFO L225 Difference]: With dead ends: 864 [2022-07-13 11:46:29,283 INFO L226 Difference]: Without dead ends: 468 [2022-07-13 11:46:29,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:29,288 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 123 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:29,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:46:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-07-13 11:46:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2022-07-13 11:46:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2022-07-13 11:46:29,328 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 155 [2022-07-13 11:46:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:29,329 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2022-07-13 11:46:29,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2022-07-13 11:46:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-13 11:46:29,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:29,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:29,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:46:29,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1225907725, now seen corresponding path program 1 times [2022-07-13 11:46:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:29,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515815485] [2022-07-13 11:46:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:29,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:46:29,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:29,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515815485] [2022-07-13 11:46:29,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515815485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:29,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:29,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:46:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863495487] [2022-07-13 11:46:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:29,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:29,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:29,408 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:29,988 INFO L93 Difference]: Finished difference Result 1330 states and 2169 transitions. [2022-07-13 11:46:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2022-07-13 11:46:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:29,992 INFO L225 Difference]: With dead ends: 1330 [2022-07-13 11:46:29,992 INFO L226 Difference]: Without dead ends: 878 [2022-07-13 11:46:29,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:29,995 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:29,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 163 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:46:29,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-07-13 11:46:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 874. [2022-07-13 11:46:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.52233676975945) internal successors, (1329), 873 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1329 transitions. [2022-07-13 11:46:30,022 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1329 transitions. Word has length 160 [2022-07-13 11:46:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:30,022 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1329 transitions. [2022-07-13 11:46:30,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1329 transitions. [2022-07-13 11:46:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-13 11:46:30,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:30,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:30,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:46:30,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:30,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:30,027 INFO L85 PathProgramCache]: Analyzing trace with hash 948456388, now seen corresponding path program 1 times [2022-07-13 11:46:30,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911599603] [2022-07-13 11:46:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:46:30,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:30,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911599603] [2022-07-13 11:46:30,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911599603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:30,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:30,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:46:30,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352508564] [2022-07-13 11:46:30,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:30,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:30,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:30,075 INFO L87 Difference]: Start difference. First operand 874 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:30,653 INFO L93 Difference]: Finished difference Result 2575 states and 3935 transitions. [2022-07-13 11:46:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2022-07-13 11:46:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:30,659 INFO L225 Difference]: With dead ends: 2575 [2022-07-13 11:46:30,659 INFO L226 Difference]: Without dead ends: 1703 [2022-07-13 11:46:30,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:30,661 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:30,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:46:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-07-13 11:46:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2022-07-13 11:46:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.498220640569395) internal successors, (2526), 1686 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2526 transitions. [2022-07-13 11:46:30,686 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2526 transitions. Word has length 163 [2022-07-13 11:46:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:30,687 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2526 transitions. [2022-07-13 11:46:30,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2526 transitions. [2022-07-13 11:46:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-13 11:46:30,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:30,692 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:30,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:46:30,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 974158482, now seen corresponding path program 1 times [2022-07-13 11:46:30,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411628386] [2022-07-13 11:46:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:30,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 11:46:30,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:30,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411628386] [2022-07-13 11:46:30,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411628386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:30,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:30,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:46:30,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694888791] [2022-07-13 11:46:30,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:30,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:30,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:30,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:30,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:30,774 INFO L87 Difference]: Start difference. First operand 1687 states and 2526 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:31,346 INFO L93 Difference]: Finished difference Result 4194 states and 6260 transitions. [2022-07-13 11:46:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:31,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 172 [2022-07-13 11:46:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:31,353 INFO L225 Difference]: With dead ends: 4194 [2022-07-13 11:46:31,354 INFO L226 Difference]: Without dead ends: 2509 [2022-07-13 11:46:31,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:31,363 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:31,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 115 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:46:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2022-07-13 11:46:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2508. [2022-07-13 11:46:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.4654966094934185) internal successors, (3674), 2507 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3674 transitions. [2022-07-13 11:46:31,402 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3674 transitions. Word has length 172 [2022-07-13 11:46:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:31,403 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 3674 transitions. [2022-07-13 11:46:31,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3674 transitions. [2022-07-13 11:46:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-13 11:46:31,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:31,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:31,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:46:31,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1777547190, now seen corresponding path program 1 times [2022-07-13 11:46:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:31,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398204771] [2022-07-13 11:46:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:46:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398204771] [2022-07-13 11:46:31,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398204771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:31,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:31,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:46:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374086973] [2022-07-13 11:46:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:31,487 INFO L87 Difference]: Start difference. First operand 2508 states and 3674 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:32,066 INFO L93 Difference]: Finished difference Result 6243 states and 9108 transitions. [2022-07-13 11:46:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 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 174 [2022-07-13 11:46:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:32,076 INFO L225 Difference]: With dead ends: 6243 [2022-07-13 11:46:32,077 INFO L226 Difference]: Without dead ends: 3737 [2022-07-13 11:46:32,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:32,082 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 208 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:32,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 155 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:46:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2022-07-13 11:46:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3726. [2022-07-13 11:46:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3726 states, 3725 states have (on average 1.4112751677852349) internal successors, (5257), 3725 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 5257 transitions. [2022-07-13 11:46:32,139 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 5257 transitions. Word has length 174 [2022-07-13 11:46:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:32,140 INFO L495 AbstractCegarLoop]: Abstraction has 3726 states and 5257 transitions. [2022-07-13 11:46:32,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 5257 transitions. [2022-07-13 11:46:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-13 11:46:32,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:32,147 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:32,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:46:32,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1531262147, now seen corresponding path program 1 times [2022-07-13 11:46:32,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:32,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063266892] [2022-07-13 11:46:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:32,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:46:32,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:32,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063266892] [2022-07-13 11:46:32,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063266892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:32,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:32,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:46:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109627164] [2022-07-13 11:46:32,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:32,212 INFO L87 Difference]: Start difference. First operand 3726 states and 5257 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:32,802 INFO L93 Difference]: Finished difference Result 10904 states and 15407 transitions. [2022-07-13 11:46:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 175 [2022-07-13 11:46:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:32,822 INFO L225 Difference]: With dead ends: 10904 [2022-07-13 11:46:32,823 INFO L226 Difference]: Without dead ends: 7180 [2022-07-13 11:46:32,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:32,828 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 225 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:32,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 429 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:46:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7180 states. [2022-07-13 11:46:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7180 to 6163. [2022-07-13 11:46:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 1.294871794871795) internal successors, (7979), 6162 states have internal predecessors, (7979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 7979 transitions. [2022-07-13 11:46:32,923 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 7979 transitions. Word has length 175 [2022-07-13 11:46:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:32,923 INFO L495 AbstractCegarLoop]: Abstraction has 6163 states and 7979 transitions. [2022-07-13 11:46:32,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 7979 transitions. [2022-07-13 11:46:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-13 11:46:32,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:32,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:32,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:46:32,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1605526751, now seen corresponding path program 1 times [2022-07-13 11:46:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:32,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211557216] [2022-07-13 11:46:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:32,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:46:32,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:32,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211557216] [2022-07-13 11:46:32,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211557216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:46:32,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181779649] [2022-07-13 11:46:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:32,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:46:32,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:46:32,990 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) [2022-07-13 11:46:32,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:46:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:33,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:46:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:46:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-13 11:46:33,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:46:33,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181779649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:33,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:46:33,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-13 11:46:33,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038124125] [2022-07-13 11:46:33,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:33,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:33,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:33,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:46:33,378 INFO L87 Difference]: Start difference. First operand 6163 states and 7979 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:33,988 INFO L93 Difference]: Finished difference Result 17012 states and 22108 transitions. [2022-07-13 11:46:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 181 [2022-07-13 11:46:33,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:34,026 INFO L225 Difference]: With dead ends: 17012 [2022-07-13 11:46:34,026 INFO L226 Difference]: Without dead ends: 10851 [2022-07-13 11:46:34,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:46:34,036 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 106 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:34,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 167 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:46:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2022-07-13 11:46:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10647. [2022-07-13 11:46:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10647 states, 10646 states have (on average 1.2629156490700733) internal successors, (13445), 10646 states have internal predecessors, (13445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10647 states to 10647 states and 13445 transitions. [2022-07-13 11:46:34,227 INFO L78 Accepts]: Start accepts. Automaton has 10647 states and 13445 transitions. Word has length 181 [2022-07-13 11:46:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:34,227 INFO L495 AbstractCegarLoop]: Abstraction has 10647 states and 13445 transitions. [2022-07-13 11:46:34,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 10647 states and 13445 transitions. [2022-07-13 11:46:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-13 11:46:34,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:34,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:34,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:46:34,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:46:34,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1425017727, now seen corresponding path program 1 times [2022-07-13 11:46:34,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:34,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953267909] [2022-07-13 11:46:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:34,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:46:34,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953267909] [2022-07-13 11:46:34,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953267909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:46:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209225231] [2022-07-13 11:46:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:34,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:46:34,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:46:34,531 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) [2022-07-13 11:46:34,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:46:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:34,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:46:34,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:46:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:46:34,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:46:34,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209225231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:34,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:46:34,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:46:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982260370] [2022-07-13 11:46:34,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:46:34,799 INFO L87 Difference]: Start difference. First operand 10647 states and 13445 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:35,458 INFO L93 Difference]: Finished difference Result 29228 states and 37033 transitions. [2022-07-13 11:46:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 193 [2022-07-13 11:46:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:35,487 INFO L225 Difference]: With dead ends: 29228 [2022-07-13 11:46:35,488 INFO L226 Difference]: Without dead ends: 18583 [2022-07-13 11:46:35,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:46:35,503 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 97 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:35,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 399 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:46:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18583 states. [2022-07-13 11:46:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18583 to 18574. [2022-07-13 11:46:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18574 states, 18573 states have (on average 1.234803208959242) internal successors, (22934), 18573 states have internal predecessors, (22934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 22934 transitions. [2022-07-13 11:46:35,783 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 22934 transitions. Word has length 193 [2022-07-13 11:46:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:35,783 INFO L495 AbstractCegarLoop]: Abstraction has 18574 states and 22934 transitions. [2022-07-13 11:46:35,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 22934 transitions. [2022-07-13 11:46:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-13 11:46:35,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:35,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:35,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:46:36,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-13 11:46:36,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1807391862, now seen corresponding path program 1 times [2022-07-13 11:46:36,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:36,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036002153] [2022-07-13 11:46:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:36,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 11:46:36,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036002153] [2022-07-13 11:46:36,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036002153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:36,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:36,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:46:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943105285] [2022-07-13 11:46:36,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:36,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:36,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:36,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:36,085 INFO L87 Difference]: Start difference. First operand 18574 states and 22934 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:36,828 INFO L93 Difference]: Finished difference Result 44860 states and 56269 transitions. [2022-07-13 11:46:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:36,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 206 [2022-07-13 11:46:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:36,872 INFO L225 Difference]: With dead ends: 44860 [2022-07-13 11:46:36,873 INFO L226 Difference]: Without dead ends: 26491 [2022-07-13 11:46:36,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:36,893 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 176 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:36,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 203 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:46:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26491 states. [2022-07-13 11:46:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26491 to 26491. [2022-07-13 11:46:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26491 states, 26490 states have (on average 1.1830502076255192) internal successors, (31339), 26490 states have internal predecessors, (31339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26491 states to 26491 states and 31339 transitions. [2022-07-13 11:46:37,318 INFO L78 Accepts]: Start accepts. Automaton has 26491 states and 31339 transitions. Word has length 206 [2022-07-13 11:46:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:37,318 INFO L495 AbstractCegarLoop]: Abstraction has 26491 states and 31339 transitions. [2022-07-13 11:46:37,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26491 states and 31339 transitions. [2022-07-13 11:46:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-07-13 11:46:37,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:37,347 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:37,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:46:37,348 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash 844524870, now seen corresponding path program 1 times [2022-07-13 11:46:37,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:37,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487397912] [2022-07-13 11:46:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:37,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 11:46:37,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487397912] [2022-07-13 11:46:37,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487397912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:46:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346209467] [2022-07-13 11:46:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:37,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:46:37,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:46:37,441 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) [2022-07-13 11:46:37,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:46:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:46:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:46:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-13 11:46:37,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:46:37,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346209467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:37,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:46:37,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-13 11:46:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591101477] [2022-07-13 11:46:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:37,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:46:37,787 INFO L87 Difference]: Start difference. First operand 26491 states and 31339 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:38,205 INFO L93 Difference]: Finished difference Result 78450 states and 92791 transitions. [2022-07-13 11:46:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 258 [2022-07-13 11:46:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:38,281 INFO L225 Difference]: With dead ends: 78450 [2022-07-13 11:46:38,281 INFO L226 Difference]: Without dead ends: 52164 [2022-07-13 11:46:38,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:46:38,314 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 320 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:38,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 596 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:46:38,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52164 states. [2022-07-13 11:46:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52164 to 52162. [2022-07-13 11:46:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52162 states, 52161 states have (on average 1.1806713828339181) internal successors, (61585), 52161 states have internal predecessors, (61585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52162 states to 52162 states and 61585 transitions. [2022-07-13 11:46:39,046 INFO L78 Accepts]: Start accepts. Automaton has 52162 states and 61585 transitions. Word has length 258 [2022-07-13 11:46:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:39,047 INFO L495 AbstractCegarLoop]: Abstraction has 52162 states and 61585 transitions. [2022-07-13 11:46:39,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 52162 states and 61585 transitions. [2022-07-13 11:46:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-13 11:46:39,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:39,213 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:39,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 11:46:39,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:46:39,431 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:39,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1012073035, now seen corresponding path program 1 times [2022-07-13 11:46:39,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552672668] [2022-07-13 11:46:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:39,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-13 11:46:39,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:39,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552672668] [2022-07-13 11:46:39,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552672668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:46:39,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462661934] [2022-07-13 11:46:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:39,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:46:39,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:46:39,508 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) [2022-07-13 11:46:39,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:46:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:46:39,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:46:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-13 11:46:39,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:46:39,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462661934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:39,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:46:39,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:46:39,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275908289] [2022-07-13 11:46:39,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:39,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:46:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:46:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:46:39,766 INFO L87 Difference]: Start difference. First operand 52162 states and 61585 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:41,026 INFO L93 Difference]: Finished difference Result 150597 states and 178484 transitions. [2022-07-13 11:46:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:46:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 266 [2022-07-13 11:46:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:41,172 INFO L225 Difference]: With dead ends: 150597 [2022-07-13 11:46:41,172 INFO L226 Difference]: Without dead ends: 98640 [2022-07-13 11:46:41,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:46:41,227 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 584 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:41,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 540 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 11:46:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98640 states. [2022-07-13 11:46:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98640 to 98588. [2022-07-13 11:46:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98588 states, 98587 states have (on average 1.1811902177771918) internal successors, (116450), 98587 states have internal predecessors, (116450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98588 states to 98588 states and 116450 transitions. [2022-07-13 11:46:42,721 INFO L78 Accepts]: Start accepts. Automaton has 98588 states and 116450 transitions. Word has length 266 [2022-07-13 11:46:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:42,722 INFO L495 AbstractCegarLoop]: Abstraction has 98588 states and 116450 transitions. [2022-07-13 11:46:42,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 98588 states and 116450 transitions. [2022-07-13 11:46:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-07-13 11:46:42,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:42,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:42,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:46:42,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:46:42,988 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1569244843, now seen corresponding path program 1 times [2022-07-13 11:46:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:42,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462691815] [2022-07-13 11:46:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:42,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 132 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-13 11:46:43,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462691815] [2022-07-13 11:46:43,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462691815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:46:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536088535] [2022-07-13 11:46:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:43,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:46:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:46:43,192 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) [2022-07-13 11:46:43,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:46:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:46:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:46:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-13 11:46:43,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:46:43,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536088535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:43,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:46:43,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-07-13 11:46:43,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852417096] [2022-07-13 11:46:43,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:43,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:43,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:46:43,451 INFO L87 Difference]: Start difference. First operand 98588 states and 116450 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:44,838 INFO L93 Difference]: Finished difference Result 244505 states and 288561 transitions. [2022-07-13 11:46:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 295 [2022-07-13 11:46:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:45,039 INFO L225 Difference]: With dead ends: 244505 [2022-07-13 11:46:45,040 INFO L226 Difference]: Without dead ends: 146122 [2022-07-13 11:46:45,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:46:45,072 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 156 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:45,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 206 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:46:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146122 states. [2022-07-13 11:46:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146122 to 135152. [2022-07-13 11:46:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135152 states, 135151 states have (on average 1.1671907718033903) internal successors, (157747), 135151 states have internal predecessors, (157747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135152 states to 135152 states and 157747 transitions. [2022-07-13 11:46:47,070 INFO L78 Accepts]: Start accepts. Automaton has 135152 states and 157747 transitions. Word has length 295 [2022-07-13 11:46:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:47,070 INFO L495 AbstractCegarLoop]: Abstraction has 135152 states and 157747 transitions. [2022-07-13 11:46:47,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 135152 states and 157747 transitions. [2022-07-13 11:46:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-07-13 11:46:47,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:47,133 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:47,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:46:47,334 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,SelfDestructingSolverStorable11 [2022-07-13 11:46:47,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash -59881777, now seen corresponding path program 1 times [2022-07-13 11:46:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:47,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352390651] [2022-07-13 11:46:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-13 11:46:47,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:47,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352390651] [2022-07-13 11:46:47,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352390651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:47,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:47,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:46:47,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85685568] [2022-07-13 11:46:47,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:47,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:47,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:47,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:47,433 INFO L87 Difference]: Start difference. First operand 135152 states and 157747 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:48,729 INFO L93 Difference]: Finished difference Result 266911 states and 311355 transitions. [2022-07-13 11:46:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 298 [2022-07-13 11:46:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:48,914 INFO L225 Difference]: With dead ends: 266911 [2022-07-13 11:46:48,915 INFO L226 Difference]: Without dead ends: 131964 [2022-07-13 11:46:48,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:48,999 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 173 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:49,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 384 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:46:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131964 states. [2022-07-13 11:46:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131964 to 126017. [2022-07-13 11:46:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126017 states, 126016 states have (on average 1.153647155916709) internal successors, (145378), 126016 states have internal predecessors, (145378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126017 states to 126017 states and 145378 transitions. [2022-07-13 11:46:50,954 INFO L78 Accepts]: Start accepts. Automaton has 126017 states and 145378 transitions. Word has length 298 [2022-07-13 11:46:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:50,954 INFO L495 AbstractCegarLoop]: Abstraction has 126017 states and 145378 transitions. [2022-07-13 11:46:50,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 126017 states and 145378 transitions. [2022-07-13 11:46:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-07-13 11:46:50,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:50,990 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:50,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 11:46:50,990 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1921048994, now seen corresponding path program 1 times [2022-07-13 11:46:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:50,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735012353] [2022-07-13 11:46:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:50,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-13 11:46:51,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735012353] [2022-07-13 11:46:51,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735012353] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:51,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:51,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:46:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822580285] [2022-07-13 11:46:51,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:51,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:46:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:46:51,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:46:51,065 INFO L87 Difference]: Start difference. First operand 126017 states and 145378 transitions. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:52,957 INFO L93 Difference]: Finished difference Result 378074 states and 435559 transitions. [2022-07-13 11:46:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:46:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 300 [2022-07-13 11:46:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:53,349 INFO L225 Difference]: With dead ends: 378074 [2022-07-13 11:46:53,349 INFO L226 Difference]: Without dead ends: 252262 [2022-07-13 11:46:53,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:46:53,432 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 789 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:53,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 408 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:46:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252262 states. [2022-07-13 11:46:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252262 to 242090. [2022-07-13 11:46:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242090 states, 242089 states have (on average 1.1476523096877596) internal successors, (277834), 242089 states have internal predecessors, (277834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242090 states to 242090 states and 277834 transitions. [2022-07-13 11:46:57,007 INFO L78 Accepts]: Start accepts. Automaton has 242090 states and 277834 transitions. Word has length 300 [2022-07-13 11:46:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:46:57,007 INFO L495 AbstractCegarLoop]: Abstraction has 242090 states and 277834 transitions. [2022-07-13 11:46:57,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 242090 states and 277834 transitions. [2022-07-13 11:46:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-07-13 11:46:57,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:46:57,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:46:57,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 11:46:57,073 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:46:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:46:57,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1508885811, now seen corresponding path program 1 times [2022-07-13 11:46:57,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:46:57,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014665825] [2022-07-13 11:46:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:46:57,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:46:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:46:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:46:57,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:46:57,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014665825] [2022-07-13 11:46:57,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014665825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:46:57,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:46:57,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:46:57,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333518115] [2022-07-13 11:46:57,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:46:57,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:46:57,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:46:57,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:46:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:57,210 INFO L87 Difference]: Start difference. First operand 242090 states and 277834 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:46:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:46:59,124 INFO L93 Difference]: Finished difference Result 436425 states and 499463 transitions. [2022-07-13 11:46:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:46:59,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 302 [2022-07-13 11:46:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:46:59,423 INFO L225 Difference]: With dead ends: 436425 [2022-07-13 11:46:59,423 INFO L226 Difference]: Without dead ends: 194540 [2022-07-13 11:46:59,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:46:59,556 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 123 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:46:59,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 350 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:46:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194540 states. [2022-07-13 11:47:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194540 to 181532. [2022-07-13 11:47:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181532 states, 181531 states have (on average 1.1189989588555123) internal successors, (203133), 181531 states have internal predecessors, (203133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:47:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181532 states to 181532 states and 203133 transitions. [2022-07-13 11:47:02,481 INFO L78 Accepts]: Start accepts. Automaton has 181532 states and 203133 transitions. Word has length 302 [2022-07-13 11:47:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:47:02,482 INFO L495 AbstractCegarLoop]: Abstraction has 181532 states and 203133 transitions. [2022-07-13 11:47:02,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:47:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 181532 states and 203133 transitions. [2022-07-13 11:47:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-07-13 11:47:02,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:47:02,558 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:47:02,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:47:02,559 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:47:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:47:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash -102169711, now seen corresponding path program 1 times [2022-07-13 11:47:02,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:47:02,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335213209] [2022-07-13 11:47:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:47:02,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:47:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:47:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-07-13 11:47:02,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:47:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335213209] [2022-07-13 11:47:02,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335213209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:47:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972209083] [2022-07-13 11:47:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:47:02,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:47:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:47:02,635 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) [2022-07-13 11:47:02,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:47:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:47:02,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:47:02,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:47:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-07-13 11:47:02,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:47:02,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972209083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:47:02,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:47:02,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:47:02,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039287112] [2022-07-13 11:47:02,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:47:02,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:47:02,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:47:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:47:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:47:02,852 INFO L87 Difference]: Start difference. First operand 181532 states and 203133 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:47:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:47:05,217 INFO L93 Difference]: Finished difference Result 561160 states and 626938 transitions. [2022-07-13 11:47:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:47:05,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 323 [2022-07-13 11:47:05,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:47:05,764 INFO L225 Difference]: With dead ends: 561160 [2022-07-13 11:47:05,764 INFO L226 Difference]: Without dead ends: 380036 [2022-07-13 11:47:06,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:47:06,351 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 791 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:47:06,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 400 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 11:47:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380036 states. [2022-07-13 11:47:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380036 to 357694. [2022-07-13 11:47:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357694 states, 357693 states have (on average 1.1159709583357795) internal successors, (399175), 357693 states have internal predecessors, (399175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:47:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357694 states to 357694 states and 399175 transitions. [2022-07-13 11:47:11,701 INFO L78 Accepts]: Start accepts. Automaton has 357694 states and 399175 transitions. Word has length 323 [2022-07-13 11:47:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:47:11,701 INFO L495 AbstractCegarLoop]: Abstraction has 357694 states and 399175 transitions. [2022-07-13 11:47:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:47:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 357694 states and 399175 transitions. [2022-07-13 11:47:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-07-13 11:47:11,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:47:11,772 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:47:11,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:47:11,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 11:47:11,974 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:47:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:47:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash -907463949, now seen corresponding path program 1 times [2022-07-13 11:47:11,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:47:11,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036501482] [2022-07-13 11:47:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:47:11,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:47:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:47:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 184 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 11:47:12,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:47:12,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036501482] [2022-07-13 11:47:12,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036501482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:47:12,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048648997] [2022-07-13 11:47:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:47:12,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:47:12,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:47:12,071 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) [2022-07-13 11:47:12,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:47:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:47:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 11:47:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:47:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 11:47:12,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:47:12,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048648997] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:47:12,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:47:12,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 11:47:12,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147511245] [2022-07-13 11:47:12,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:47:12,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:47:12,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:47:12,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:47:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:47:12,278 INFO L87 Difference]: Start difference. First operand 357694 states and 399175 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:47:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:47:15,696 INFO L93 Difference]: Finished difference Result 916994 states and 1021544 transitions. [2022-07-13 11:47:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:47:15,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 328 [2022-07-13 11:47:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:47:16,587 INFO L225 Difference]: With dead ends: 916994 [2022-07-13 11:47:16,587 INFO L226 Difference]: Without dead ends: 559708 [2022-07-13 11:47:16,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:47:16,739 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 235 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:47:16,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 859 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:47:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559708 states.