./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum4.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 ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 22:27:02,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 22:27:02,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 22:27:02,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 22:27:02,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 22:27:02,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 22:27:02,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 22:27:02,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 22:27:02,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 22:27:02,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 22:27:02,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 22:27:02,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 22:27:02,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 22:27:02,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 22:27:02,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 22:27:02,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 22:27:02,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 22:27:02,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 22:27:02,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 22:27:02,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 22:27:02,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 22:27:02,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 22:27:02,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 22:27:02,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 22:27:02,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 22:27:02,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 22:27:02,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 22:27:02,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 22:27:02,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 22:27:02,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 22:27:02,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 22:27:02,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 22:27:02,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 22:27:02,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 22:27:02,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 22:27:02,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 22:27:02,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 22:27:02,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 22:27:02,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 22:27:02,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 22:27:02,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 22:27:02,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 22:27:02,789 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 22:27:02,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 22:27:02,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 22:27:02,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 22:27:02,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 22:27:02,791 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 22:27:02,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 22:27:02,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 22:27:02,792 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 22:27:02,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 22:27:02,792 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 22:27:02,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 22:27:02,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 22:27:02,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 22:27:02,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 22:27:02,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 22:27:02,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 22:27:02,794 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 22:27:02,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 22:27:02,794 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 22:27:02,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 22:27:02,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 22:27:02,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 22:27:02,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 22:27:02,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:27:02,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 22:27:02,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 22:27:02,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 22:27:02,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 22:27:02,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 22:27:02,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 22:27:02,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 22:27:02,797 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 22:27:02,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 22:27:02,798 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 22:27:02,798 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2023-02-13 22:27:02,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 22:27:02,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 22:27:02,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 22:27:02,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 22:27:03,000 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 22:27:03,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum4.c [2023-02-13 22:27:04,121 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 22:27:04,325 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 22:27:04,326 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c [2023-02-13 22:27:04,330 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14586548/4f79605ad86a4f1f9d79963ed956a381/FLAG955dc4772 [2023-02-13 22:27:04,345 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14586548/4f79605ad86a4f1f9d79963ed956a381 [2023-02-13 22:27:04,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 22:27:04,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 22:27:04,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 22:27:04,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 22:27:04,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 22:27:04,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d2efb40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04, skipping insertion in model container [2023-02-13 22:27:04,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 22:27:04,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 22:27:04,494 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c[400,413] [2023-02-13 22:27:04,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:27:04,520 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 22:27:04,529 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c[400,413] [2023-02-13 22:27:04,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:27:04,547 INFO L208 MainTranslator]: Completed translation [2023-02-13 22:27:04,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04 WrapperNode [2023-02-13 22:27:04,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 22:27:04,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 22:27:04,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 22:27:04,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 22:27:04,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,575 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-02-13 22:27:04,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 22:27:04,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 22:27:04,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 22:27:04,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 22:27:04,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,596 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 22:27:04,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 22:27:04,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 22:27:04,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 22:27:04,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (1/1) ... [2023-02-13 22:27:04,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:27:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:27:04,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-13 22:27:04,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-13 22:27:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 22:27:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 22:27:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 22:27:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 22:27:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 22:27:04,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 22:27:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 22:27:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 22:27:04,777 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 22:27:04,779 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 22:27:05,042 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 22:27:05,048 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 22:27:05,048 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2023-02-13 22:27:05,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:27:05 BoogieIcfgContainer [2023-02-13 22:27:05,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 22:27:05,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 22:27:05,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 22:27:05,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 22:27:05,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 10:27:04" (1/3) ... [2023-02-13 22:27:05,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398d82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:27:05, skipping insertion in model container [2023-02-13 22:27:05,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:27:04" (2/3) ... [2023-02-13 22:27:05,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398d82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:27:05, skipping insertion in model container [2023-02-13 22:27:05,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:27:05" (3/3) ... [2023-02-13 22:27:05,059 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2023-02-13 22:27:05,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 22:27:05,075 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 22:27:05,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 22:27:05,120 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@485c8619, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 22:27:05,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 22:27:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-13 22:27:05,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:05,130 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] [2023-02-13 22:27:05,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2023-02-13 22:27:05,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:05,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039278498] [2023-02-13 22:27:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:05,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:27:05,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039278498] [2023-02-13 22:27:05,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039278498] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:27:05,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:27:05,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 22:27:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963875573] [2023-02-13 22:27:05,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:27:05,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 22:27:05,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:27:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 22:27:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:27:05,339 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:27:05,357 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2023-02-13 22:27:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 22:27:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-13 22:27:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:27:05,365 INFO L225 Difference]: With dead ends: 71 [2023-02-13 22:27:05,365 INFO L226 Difference]: Without dead ends: 33 [2023-02-13 22:27:05,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:27:05,370 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:27:05,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:27:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-13 22:27:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-13 22:27:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-13 22:27:05,396 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2023-02-13 22:27:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:27:05,396 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-13 22:27:05,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-13 22:27:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-13 22:27:05,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:05,398 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] [2023-02-13 22:27:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 22:27:05,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2023-02-13 22:27:05,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:05,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997513516] [2023-02-13 22:27:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:05,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:27:05,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:05,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997513516] [2023-02-13 22:27:05,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997513516] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:27:05,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:27:05,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:27:05,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11277707] [2023-02-13 22:27:05,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:27:05,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 22:27:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:27:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 22:27:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:27:05,551 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:27:05,619 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-02-13 22:27:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 22:27:05,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-13 22:27:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:27:05,620 INFO L225 Difference]: With dead ends: 63 [2023-02-13 22:27:05,620 INFO L226 Difference]: Without dead ends: 35 [2023-02-13 22:27:05,621 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 [2023-02-13 22:27:05,622 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:27:05,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:27:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-13 22:27:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-02-13 22:27:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-13 22:27:05,629 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2023-02-13 22:27:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:27:05,629 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-13 22:27:05,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-13 22:27:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-13 22:27:05,631 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:05,631 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] [2023-02-13 22:27:05,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 22:27:05,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2023-02-13 22:27:05,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:05,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768498580] [2023-02-13 22:27:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:05,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:27:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:05,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768498580] [2023-02-13 22:27:05,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768498580] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:27:05,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:27:05,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 22:27:05,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867961337] [2023-02-13 22:27:05,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:27:05,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 22:27:05,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:27:05,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 22:27:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:27:05,801 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:27:05,920 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2023-02-13 22:27:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 22:27:05,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-13 22:27:05,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:27:05,924 INFO L225 Difference]: With dead ends: 75 [2023-02-13 22:27:05,925 INFO L226 Difference]: Without dead ends: 50 [2023-02-13 22:27:05,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:27:05,930 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:27:05,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:27:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-13 22:27:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2023-02-13 22:27:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-02-13 22:27:05,944 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2023-02-13 22:27:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:27:05,944 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-02-13 22:27:05,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-02-13 22:27:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-13 22:27:05,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:05,947 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] [2023-02-13 22:27:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 22:27:05,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2023-02-13 22:27:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:05,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484816599] [2023-02-13 22:27:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-13 22:27:06,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:06,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484816599] [2023-02-13 22:27:06,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484816599] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:27:06,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655833454] [2023-02-13 22:27:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:06,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:06,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:27:06,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:27:06,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 22:27:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 22:27:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:27:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-13 22:27:06,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:27:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-13 22:27:06,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655833454] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:27:06,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:27:06,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 22:27:06,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429551799] [2023-02-13 22:27:06,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:27:06,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 22:27:06,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:27:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 22:27:06,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-13 22:27:06,371 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:27:06,452 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2023-02-13 22:27:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-13 22:27:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-13 22:27:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:27:06,453 INFO L225 Difference]: With dead ends: 81 [2023-02-13 22:27:06,466 INFO L226 Difference]: Without dead ends: 45 [2023-02-13 22:27:06,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-13 22:27:06,467 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:27:06,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 77 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:27:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-13 22:27:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-02-13 22:27:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-02-13 22:27:06,487 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2023-02-13 22:27:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:27:06,487 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-02-13 22:27:06,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-02-13 22:27:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-13 22:27:06,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:06,491 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:27:06,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 22:27:06,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:06,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2023-02-13 22:27:06,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:06,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242530110] [2023-02-13 22:27:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:06,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 22:27:06,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:06,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242530110] [2023-02-13 22:27:06,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242530110] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:27:06,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261588407] [2023-02-13 22:27:06,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:27:06,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:06,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:27:06,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:27:06,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 22:27:06,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:27:06,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:27:06,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 22:27:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:27:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 22:27:06,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:27:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 22:27:07,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261588407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:27:07,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:27:07,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-13 22:27:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961528851] [2023-02-13 22:27:07,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:27:07,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 22:27:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:27:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 22:27:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-13 22:27:07,047 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:27:07,151 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2023-02-13 22:27:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 22:27:07,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-13 22:27:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:27:07,152 INFO L225 Difference]: With dead ends: 100 [2023-02-13 22:27:07,152 INFO L226 Difference]: Without dead ends: 68 [2023-02-13 22:27:07,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-13 22:27:07,154 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:27:07,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:27:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-13 22:27:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2023-02-13 22:27:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-02-13 22:27:07,161 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2023-02-13 22:27:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:27:07,161 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-02-13 22:27:07,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-02-13 22:27:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-13 22:27:07,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:07,162 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-13 22:27:07,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-13 22:27:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:07,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2023-02-13 22:27:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:07,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356317695] [2023-02-13 22:27:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:27:10,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356317695] [2023-02-13 22:27:10,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356317695] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:27:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196666913] [2023-02-13 22:27:10,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:27:10,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:10,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:27:10,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:27:10,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 22:27:11,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-13 22:27:11,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:27:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-13 22:27:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:27:12,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:27:12,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2023-02-13 22:27:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:27:12,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:27:17,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:27:17,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 76 [2023-02-13 22:27:18,056 INFO L321 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2023-02-13 22:27:18,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 17 [2023-02-13 22:27:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:27:18,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196666913] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:27:18,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:27:18,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 29] total 65 [2023-02-13 22:27:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109694746] [2023-02-13 22:27:18,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:27:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-13 22:27:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:27:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-13 22:27:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3745, Unknown=0, NotChecked=0, Total=4160 [2023-02-13 22:27:18,546 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:27:26,875 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2023-02-13 22:27:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-13 22:27:26,876 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-13 22:27:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:27:26,877 INFO L225 Difference]: With dead ends: 169 [2023-02-13 22:27:26,877 INFO L226 Difference]: Without dead ends: 163 [2023-02-13 22:27:26,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 68 SyntacticMatches, 33 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 3154 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=805, Invalid=6851, Unknown=0, NotChecked=0, Total=7656 [2023-02-13 22:27:26,881 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 113 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:27:26,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 133 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-13 22:27:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-13 22:27:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2023-02-13 22:27:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2023-02-13 22:27:26,896 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2023-02-13 22:27:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:27:26,897 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2023-02-13 22:27:26,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2023-02-13 22:27:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-13 22:27:26,898 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:26,899 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-02-13 22:27:26,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 22:27:27,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:27,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2023-02-13 22:27:27,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:27,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273857659] [2023-02-13 22:27:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:27,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:27:27,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:27,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273857659] [2023-02-13 22:27:27,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273857659] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:27:27,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750665789] [2023-02-13 22:27:27,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:27:27,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:27,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:27:27,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:27:27,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 22:27:27,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:27:27,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:27:27,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:27:27,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:27:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:27:27,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:27:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:27:27,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750665789] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:27:27,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:27:27,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-13 22:27:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984137101] [2023-02-13 22:27:27,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:27:27,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-13 22:27:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:27:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-13 22:27:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-13 22:27:27,502 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:27:27,909 INFO L93 Difference]: Finished difference Result 274 states and 315 transitions. [2023-02-13 22:27:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-13 22:27:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-02-13 22:27:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:27:27,911 INFO L225 Difference]: With dead ends: 274 [2023-02-13 22:27:27,911 INFO L226 Difference]: Without dead ends: 136 [2023-02-13 22:27:27,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-13 22:27:27,913 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 264 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:27:27,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 65 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 22:27:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-13 22:27:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2023-02-13 22:27:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2023-02-13 22:27:27,924 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2023-02-13 22:27:27,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:27:27,925 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2023-02-13 22:27:27,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2023-02-13 22:27:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-13 22:27:27,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:27,926 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-13 22:27:27,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 22:27:28,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:28,132 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:28,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2023-02-13 22:27:28,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:28,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395443722] [2023-02-13 22:27:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:28,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-13 22:27:28,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395443722] [2023-02-13 22:27:28,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395443722] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:27:28,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840357508] [2023-02-13 22:27:28,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:27:28,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:28,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:27:28,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:27:28,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 22:27:28,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-13 22:27:28,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:27:28,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:27:28,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:27:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-13 22:27:28,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:27:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-13 22:27:28,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840357508] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:27:28,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:27:28,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-13 22:27:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989759709] [2023-02-13 22:27:28,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:27:28,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 22:27:28,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:27:28,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 22:27:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-13 22:27:28,515 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:27:28,706 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2023-02-13 22:27:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-13 22:27:28,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-13 22:27:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:27:28,707 INFO L225 Difference]: With dead ends: 126 [2023-02-13 22:27:28,707 INFO L226 Difference]: Without dead ends: 86 [2023-02-13 22:27:28,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-13 22:27:28,708 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 155 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:27:28,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 39 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:27:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-13 22:27:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-02-13 22:27:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-02-13 22:27:28,716 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2023-02-13 22:27:28,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:27:28,717 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-02-13 22:27:28,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:27:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-02-13 22:27:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-13 22:27:28,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:27:28,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:27:28,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 22:27:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:28,928 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:27:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:27:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2023-02-13 22:27:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:27:28,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56323759] [2023-02-13 22:27:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:27:28,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:27:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:27:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:27:33,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:27:33,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56323759] [2023-02-13 22:27:33,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56323759] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:27:33,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355589798] [2023-02-13 22:27:33,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:27:33,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:27:33,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:27:33,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:27:33,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 22:27:33,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-13 22:27:33,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:27:33,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-13 22:27:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:27:34,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:27:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:27:36,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:28:01,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 80 [2023-02-13 22:28:01,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:28:01,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 189 [2023-02-13 22:28:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:28:01,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355589798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:28:01,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:28:01,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 45, 44] total 116 [2023-02-13 22:28:01,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787497148] [2023-02-13 22:28:01,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:28:01,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-02-13 22:28:01,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:28:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-02-13 22:28:01,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=12422, Unknown=11, NotChecked=0, Total=13340 [2023-02-13 22:28:01,673 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 116 states, 116 states have (on average 1.7758620689655173) internal successors, (206), 116 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) [2023-02-13 22:28:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:28:09,356 INFO L93 Difference]: Finished difference Result 184 states and 209 transitions. [2023-02-13 22:28:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-13 22:28:09,358 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.7758620689655173) internal successors, (206), 116 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 77 [2023-02-13 22:28:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:28:09,358 INFO L225 Difference]: With dead ends: 184 [2023-02-13 22:28:09,359 INFO L226 Difference]: Without dead ends: 84 [2023-02-13 22:28:09,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 80 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8793 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=1648, Invalid=18363, Unknown=11, NotChecked=0, Total=20022 [2023-02-13 22:28:09,363 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 221 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 5777 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 6248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 5777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-13 22:28:09,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 242 Invalid, 6248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 5777 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-02-13 22:28:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-13 22:28:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2023-02-13 22:28:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-02-13 22:28:09,370 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 77 [2023-02-13 22:28:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:28:09,371 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-02-13 22:28:09,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.7758620689655173) internal successors, (206), 116 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) [2023-02-13 22:28:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-02-13 22:28:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-13 22:28:09,372 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:28:09,372 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:28:09,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-13 22:28:09,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:28:09,578 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:28:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:28:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash 385815078, now seen corresponding path program 7 times [2023-02-13 22:28:09,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:28:09,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119090213] [2023-02-13 22:28:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:28:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:28:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:28:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-13 22:28:09,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:28:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119090213] [2023-02-13 22:28:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119090213] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:28:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15185313] [2023-02-13 22:28:09,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:28:09,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:28:09,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:28:09,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:28:09,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 22:28:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:28:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-13 22:28:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:28:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-13 22:28:09,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:28:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-13 22:28:09,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15185313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:28:09,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:28:09,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-13 22:28:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166157421] [2023-02-13 22:28:09,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:28:09,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-13 22:28:09,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:28:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-13 22:28:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-02-13 22:28:09,999 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:28:10,237 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2023-02-13 22:28:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 22:28:10,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-02-13 22:28:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:28:10,239 INFO L225 Difference]: With dead ends: 156 [2023-02-13 22:28:10,239 INFO L226 Difference]: Without dead ends: 104 [2023-02-13 22:28:10,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 148 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2023-02-13 22:28:10,240 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 417 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:28:10,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 36 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:28:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-13 22:28:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2023-02-13 22:28:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2023-02-13 22:28:10,247 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2023-02-13 22:28:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:28:10,248 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2023-02-13 22:28:10,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2023-02-13 22:28:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-13 22:28:10,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:28:10,249 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:28:10,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-13 22:28:10,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:28:10,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:28:10,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:28:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 8 times [2023-02-13 22:28:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:28:10,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500011015] [2023-02-13 22:28:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:28:10,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:28:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:28:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:28:17,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:28:17,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500011015] [2023-02-13 22:28:17,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500011015] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:28:17,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391881212] [2023-02-13 22:28:17,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:28:17,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:28:17,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:28:17,973 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:28:17,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 22:28:18,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:28:18,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:28:18,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 148 conjunts are in the unsatisfiable core [2023-02-13 22:28:18,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:28:18,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:28:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:28:20,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:28:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 22:28:21,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391881212] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:28:21,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:28:21,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 24, 19] total 96 [2023-02-13 22:28:21,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774529364] [2023-02-13 22:28:21,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:28:21,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-02-13 22:28:21,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:28:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-02-13 22:28:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=8635, Unknown=0, NotChecked=0, Total=9120 [2023-02-13 22:28:21,682 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 96 states, 96 states have (on average 2.5625) internal successors, (246), 96 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:28:30,484 INFO L93 Difference]: Finished difference Result 276 states and 306 transitions. [2023-02-13 22:28:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-13 22:28:30,485 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.5625) internal successors, (246), 96 states have internal predecessors, (246), 0 states have call successors, (0), 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 95 [2023-02-13 22:28:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:28:30,486 INFO L225 Difference]: With dead ends: 276 [2023-02-13 22:28:30,486 INFO L226 Difference]: Without dead ends: 272 [2023-02-13 22:28:30,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 146 SyntacticMatches, 26 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1502, Invalid=20550, Unknown=0, NotChecked=0, Total=22052 [2023-02-13 22:28:30,489 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 5539 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 6262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 5539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:28:30,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 216 Invalid, 6262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 5539 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-02-13 22:28:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-13 22:28:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 173. [2023-02-13 22:28:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1046511627906976) internal successors, (190), 172 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 190 transitions. [2023-02-13 22:28:30,514 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 190 transitions. Word has length 95 [2023-02-13 22:28:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:28:30,514 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 190 transitions. [2023-02-13 22:28:30,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.5625) internal successors, (246), 96 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 190 transitions. [2023-02-13 22:28:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-13 22:28:30,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:28:30,516 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:28:30,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-13 22:28:30,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-13 22:28:30,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:28:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:28:30,717 INFO L85 PathProgramCache]: Analyzing trace with hash 208634870, now seen corresponding path program 9 times [2023-02-13 22:28:30,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:28:30,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563162351] [2023-02-13 22:28:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:28:30,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:28:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:28:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-13 22:28:30,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:28:30,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563162351] [2023-02-13 22:28:30,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563162351] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:28:30,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506020512] [2023-02-13 22:28:30,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:28:30,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:28:30,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:28:30,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:28:30,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 22:28:30,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-13 22:28:30,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:28:30,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 22:28:30,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:28:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-13 22:28:31,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:28:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-13 22:28:31,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506020512] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:28:31,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:28:31,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-13 22:28:31,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127411803] [2023-02-13 22:28:31,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:28:31,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-13 22:28:31,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:28:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-13 22:28:31,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-13 22:28:31,208 INFO L87 Difference]: Start difference. First operand 173 states and 190 transitions. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:28:31,795 INFO L93 Difference]: Finished difference Result 467 states and 513 transitions. [2023-02-13 22:28:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-13 22:28:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2023-02-13 22:28:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:28:31,796 INFO L225 Difference]: With dead ends: 467 [2023-02-13 22:28:31,797 INFO L226 Difference]: Without dead ends: 196 [2023-02-13 22:28:31,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 183 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2023-02-13 22:28:31,798 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 535 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:28:31,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 70 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:28:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-02-13 22:28:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 172. [2023-02-13 22:28:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.087719298245614) internal successors, (186), 171 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2023-02-13 22:28:31,817 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 97 [2023-02-13 22:28:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:28:31,817 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2023-02-13 22:28:31,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2023-02-13 22:28:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-13 22:28:31,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:28:31,818 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:28:31,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-13 22:28:32,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:28:32,031 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:28:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:28:32,032 INFO L85 PathProgramCache]: Analyzing trace with hash 356238296, now seen corresponding path program 10 times [2023-02-13 22:28:32,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:28:32,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030962729] [2023-02-13 22:28:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:28:32,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:28:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:28:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-13 22:28:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:28:32,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030962729] [2023-02-13 22:28:32,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030962729] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:28:32,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449513510] [2023-02-13 22:28:32,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:28:32,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:28:32,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:28:32,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:28:32,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 22:28:32,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:28:32,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:28:32,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 22:28:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:28:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-13 22:28:32,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:28:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-13 22:28:32,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449513510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:28:32,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:28:32,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-13 22:28:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917127265] [2023-02-13 22:28:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:28:32,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-13 22:28:32,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:28:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-13 22:28:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-13 22:28:32,555 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:28:33,026 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2023-02-13 22:28:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 22:28:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-02-13 22:28:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:28:33,027 INFO L225 Difference]: With dead ends: 186 [2023-02-13 22:28:33,028 INFO L226 Difference]: Without dead ends: 122 [2023-02-13 22:28:33,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 177 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2023-02-13 22:28:33,028 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 531 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:28:33,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 41 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:28:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-13 22:28:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2023-02-13 22:28:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2023-02-13 22:28:33,041 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 99 [2023-02-13 22:28:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:28:33,041 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2023-02-13 22:28:33,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:28:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2023-02-13 22:28:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-13 22:28:33,042 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:28:33,042 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:28:33,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-13 22:28:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-13 22:28:33,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:28:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:28:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 11 times [2023-02-13 22:28:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:28:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403426948] [2023-02-13 22:28:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:28:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:28:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:28:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 12 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:28:43,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:28:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403426948] [2023-02-13 22:28:43,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403426948] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:28:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482339368] [2023-02-13 22:28:43,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:28:43,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:28:43,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:28:43,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:28:43,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-13 22:28:44,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-13 22:28:44,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:28:44,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 184 conjunts are in the unsatisfiable core [2023-02-13 22:28:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:28:44,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:28:44,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:28:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:28:47,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:28:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 22:28:50,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482339368] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:28:50,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:28:50,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 29, 23] total 110 [2023-02-13 22:28:50,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563550003] [2023-02-13 22:28:50,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:28:50,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-02-13 22:28:50,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:28:50,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-02-13 22:28:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=11498, Unknown=0, NotChecked=0, Total=11990 [2023-02-13 22:28:50,245 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 110 states, 110 states have (on average 2.6818181818181817) internal successors, (295), 110 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:29:01,839 INFO L93 Difference]: Finished difference Result 225 states and 247 transitions. [2023-02-13 22:29:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-13 22:29:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.6818181818181817) internal successors, (295), 110 states have internal predecessors, (295), 0 states have call successors, (0), 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 113 [2023-02-13 22:29:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:29:01,841 INFO L225 Difference]: With dead ends: 225 [2023-02-13 22:29:01,841 INFO L226 Difference]: Without dead ends: 221 [2023-02-13 22:29:01,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 177 SyntacticMatches, 35 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8027 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1504, Invalid=23618, Unknown=0, NotChecked=0, Total=25122 [2023-02-13 22:29:01,843 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 7478 mSolverCounterSat, 1338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 8816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1338 IncrementalHoareTripleChecker+Valid, 7478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:29:01,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 255 Invalid, 8816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1338 Valid, 7478 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-02-13 22:29:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-13 22:29:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 116. [2023-02-13 22:29:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 115 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2023-02-13 22:29:01,868 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 113 [2023-02-13 22:29:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:29:01,868 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2023-02-13 22:29:01,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.6818181818181817) internal successors, (295), 110 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2023-02-13 22:29:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-13 22:29:01,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:29:01,869 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:29:01,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-13 22:29:02,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-13 22:29:02,077 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:29:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:29:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -419294808, now seen corresponding path program 12 times [2023-02-13 22:29:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:29:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354613186] [2023-02-13 22:29:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:29:02,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:29:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:29:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-13 22:29:02,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:29:02,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354613186] [2023-02-13 22:29:02,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354613186] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:29:02,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630893928] [2023-02-13 22:29:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:29:02,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:29:02,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:29:02,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:29:02,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-13 22:29:02,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-13 22:29:02,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:29:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-13 22:29:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:29:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-13 22:29:02,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:29:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-13 22:29:02,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630893928] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:29:02,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:29:02,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2023-02-13 22:29:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074146632] [2023-02-13 22:29:02,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:29:02,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-13 22:29:02,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:29:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-13 22:29:02,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2023-02-13 22:29:02,891 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:29:03,630 INFO L93 Difference]: Finished difference Result 419 states and 455 transitions. [2023-02-13 22:29:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-13 22:29:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-02-13 22:29:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:29:03,632 INFO L225 Difference]: With dead ends: 419 [2023-02-13 22:29:03,632 INFO L226 Difference]: Without dead ends: 141 [2023-02-13 22:29:03,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 212 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2023-02-13 22:29:03,633 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 539 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 22:29:03,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 100 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 22:29:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-13 22:29:03,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2023-02-13 22:29:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2023-02-13 22:29:03,659 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 115 [2023-02-13 22:29:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:29:03,659 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2023-02-13 22:29:03,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2023-02-13 22:29:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-13 22:29:03,660 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:29:03,660 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:29:03,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-13 22:29:03,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-13 22:29:03,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:29:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:29:03,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1520659528, now seen corresponding path program 13 times [2023-02-13 22:29:03,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:29:03,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151201615] [2023-02-13 22:29:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:29:03,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:29:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:29:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:29:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:29:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151201615] [2023-02-13 22:29:19,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151201615] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:29:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212445633] [2023-02-13 22:29:19,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:29:19,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:29:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:29:19,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:29:19,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-13 22:29:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:29:19,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 216 conjunts are in the unsatisfiable core [2023-02-13 22:29:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:29:19,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:29:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:29:23,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:29:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-13 22:29:27,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212445633] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:29:27,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:29:27,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 34, 27] total 132 [2023-02-13 22:29:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145686776] [2023-02-13 22:29:27,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:29:27,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2023-02-13 22:29:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:29:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2023-02-13 22:29:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=16666, Unknown=0, NotChecked=0, Total=17292 [2023-02-13 22:29:27,464 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 132 states, 132 states have (on average 2.5681818181818183) internal successors, (339), 132 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:29:47,171 INFO L93 Difference]: Finished difference Result 354 states and 384 transitions. [2023-02-13 22:29:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-02-13 22:29:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.5681818181818183) internal successors, (339), 132 states have internal predecessors, (339), 0 states have call successors, (0), 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 131 [2023-02-13 22:29:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:29:47,173 INFO L225 Difference]: With dead ends: 354 [2023-02-13 22:29:47,173 INFO L226 Difference]: Without dead ends: 350 [2023-02-13 22:29:47,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 206 SyntacticMatches, 38 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12639 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=2593, Invalid=40049, Unknown=0, NotChecked=0, Total=42642 [2023-02-13 22:29:47,176 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 318 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 11016 mSolverCounterSat, 1744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 12760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1744 IncrementalHoareTripleChecker+Valid, 11016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:29:47,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 268 Invalid, 12760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1744 Valid, 11016 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-02-13 22:29:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-02-13 22:29:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 241. [2023-02-13 22:29:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0833333333333333) internal successors, (260), 240 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 260 transitions. [2023-02-13 22:29:47,238 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 260 transitions. Word has length 131 [2023-02-13 22:29:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:29:47,238 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 260 transitions. [2023-02-13 22:29:47,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.5681818181818183) internal successors, (339), 132 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 260 transitions. [2023-02-13 22:29:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-13 22:29:47,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:29:47,239 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:29:47,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-13 22:29:47,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-13 22:29:47,440 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:29:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:29:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1011689766, now seen corresponding path program 14 times [2023-02-13 22:29:47,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:29:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732081150] [2023-02-13 22:29:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:29:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:29:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:29:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-02-13 22:29:47,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:29:47,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732081150] [2023-02-13 22:29:47,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732081150] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:29:47,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961985946] [2023-02-13 22:29:47,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:29:47,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:29:47,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:29:47,669 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:29:47,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-13 22:29:47,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:29:47,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:29:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-13 22:29:47,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:29:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-02-13 22:29:48,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:29:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-02-13 22:29:48,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961985946] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:29:48,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:29:48,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-13 22:29:48,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671441323] [2023-02-13 22:29:48,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:29:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-13 22:29:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:29:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-13 22:29:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-02-13 22:29:48,200 INFO L87 Difference]: Start difference. First operand 241 states and 260 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:29:48,741 INFO L93 Difference]: Finished difference Result 569 states and 614 transitions. [2023-02-13 22:29:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-13 22:29:48,741 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 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 133 [2023-02-13 22:29:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:29:48,742 INFO L225 Difference]: With dead ends: 569 [2023-02-13 22:29:48,742 INFO L226 Difference]: Without dead ends: 244 [2023-02-13 22:29:48,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 243 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2023-02-13 22:29:48,743 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:29:48,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 100 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:29:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-13 22:29:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2023-02-13 22:29:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0826446280991735) internal successors, (262), 242 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 262 transitions. [2023-02-13 22:29:48,794 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 262 transitions. Word has length 133 [2023-02-13 22:29:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:29:48,794 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 262 transitions. [2023-02-13 22:29:48,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 262 transitions. [2023-02-13 22:29:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-13 22:29:48,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:29:48,795 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:29:48,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-13 22:29:49,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:29:49,001 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:29:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:29:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1838655620, now seen corresponding path program 15 times [2023-02-13 22:29:49,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:29:49,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096210229] [2023-02-13 22:29:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:29:49,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:29:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:29:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-13 22:29:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:29:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096210229] [2023-02-13 22:29:49,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096210229] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:29:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813608649] [2023-02-13 22:29:49,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:29:49,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:29:49,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:29:49,198 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:29:49,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-13 22:29:49,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-13 22:29:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:29:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-13 22:29:49,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:29:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-13 22:29:49,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:29:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-13 22:29:49,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813608649] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:29:49,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:29:49,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-13 22:29:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161530005] [2023-02-13 22:29:49,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:29:49,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-13 22:29:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:29:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-13 22:29:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2023-02-13 22:29:49,763 INFO L87 Difference]: Start difference. First operand 243 states and 262 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:29:50,126 INFO L93 Difference]: Finished difference Result 369 states and 402 transitions. [2023-02-13 22:29:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-13 22:29:50,127 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-02-13 22:29:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:29:50,127 INFO L225 Difference]: With dead ends: 369 [2023-02-13 22:29:50,127 INFO L226 Difference]: Without dead ends: 158 [2023-02-13 22:29:50,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 247 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=843, Unknown=0, NotChecked=0, Total=1190 [2023-02-13 22:29:50,129 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 516 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:29:50,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 36 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:29:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-13 22:29:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2023-02-13 22:29:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0604026845637584) internal successors, (158), 149 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) [2023-02-13 22:29:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2023-02-13 22:29:50,164 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 135 [2023-02-13 22:29:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:29:50,164 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2023-02-13 22:29:50,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:29:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2023-02-13 22:29:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-13 22:29:50,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:29:50,165 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:29:50,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-13 22:29:50,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-13 22:29:50,371 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:29:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:29:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1596967702, now seen corresponding path program 16 times [2023-02-13 22:29:50,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:29:50,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446924239] [2023-02-13 22:29:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:29:50,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:29:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:30:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 42 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:30:08,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:30:08,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446924239] [2023-02-13 22:30:08,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446924239] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:30:08,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093949565] [2023-02-13 22:30:08,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:30:08,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:30:08,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:30:08,949 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:30:08,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-13 22:30:09,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:30:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:30:09,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 234 conjunts are in the unsatisfiable core [2023-02-13 22:30:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:30:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-13 22:30:13,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:30:17,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:30:17,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 120 treesize of output 551 [2023-02-13 22:30:21,359 INFO L321 Elim1Store]: treesize reduction 504, result has 5.4 percent of original size [2023-02-13 22:30:21,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 121 treesize of output 48 [2023-02-13 22:30:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-13 22:30:21,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093949565] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:30:21,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:30:21,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 32, 32] total 134 [2023-02-13 22:30:21,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811695557] [2023-02-13 22:30:21,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:30:21,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-02-13 22:30:21,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:30:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-02-13 22:30:21,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=16876, Unknown=0, NotChecked=0, Total=17822 [2023-02-13 22:30:21,481 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 134 states, 134 states have (on average 2.6641791044776117) internal successors, (357), 134 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:30:40,127 INFO L93 Difference]: Finished difference Result 414 states and 444 transitions. [2023-02-13 22:30:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-13 22:30:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.6641791044776117) internal successors, (357), 134 states have internal predecessors, (357), 0 states have call successors, (0), 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 149 [2023-02-13 22:30:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:30:40,129 INFO L225 Difference]: With dead ends: 414 [2023-02-13 22:30:40,129 INFO L226 Difference]: Without dead ends: 410 [2023-02-13 22:30:40,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 243 SyntacticMatches, 58 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19231 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=3412, Invalid=43894, Unknown=0, NotChecked=0, Total=47306 [2023-02-13 22:30:40,131 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 198 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 10096 mSolverCounterSat, 1262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 11358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 10096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:30:40,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 272 Invalid, 11358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1262 Valid, 10096 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-02-13 22:30:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-02-13 22:30:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 269. [2023-02-13 22:30:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0671641791044777) internal successors, (286), 268 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 286 transitions. [2023-02-13 22:30:40,217 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 286 transitions. Word has length 149 [2023-02-13 22:30:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:30:40,217 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 286 transitions. [2023-02-13 22:30:40,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.6641791044776117) internal successors, (357), 134 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 286 transitions. [2023-02-13 22:30:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-02-13 22:30:40,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:30:40,219 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:30:40,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-13 22:30:40,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:30:40,424 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:30:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:30:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1329400948, now seen corresponding path program 17 times [2023-02-13 22:30:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:30:40,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336940098] [2023-02-13 22:30:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:30:40,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:30:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:30:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-02-13 22:30:40,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:30:40,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336940098] [2023-02-13 22:30:40,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336940098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:30:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854420404] [2023-02-13 22:30:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:30:40,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:30:40,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:30:40,657 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:30:40,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-13 22:30:40,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-13 22:30:40,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:30:40,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-13 22:30:40,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:30:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-02-13 22:30:41,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:30:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-02-13 22:30:41,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854420404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:30:41,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:30:41,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2023-02-13 22:30:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662085010] [2023-02-13 22:30:41,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:30:41,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-13 22:30:41,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:30:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-13 22:30:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2023-02-13 22:30:41,562 INFO L87 Difference]: Start difference. First operand 269 states and 286 transitions. Second operand has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 36 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:30:42,673 INFO L93 Difference]: Finished difference Result 713 states and 759 transitions. [2023-02-13 22:30:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-13 22:30:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 36 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-02-13 22:30:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:30:42,676 INFO L225 Difference]: With dead ends: 713 [2023-02-13 22:30:42,676 INFO L226 Difference]: Without dead ends: 286 [2023-02-13 22:30:42,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 269 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=529, Invalid=2227, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 22:30:42,677 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 707 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:30:42,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 98 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-13 22:30:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-02-13 22:30:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2023-02-13 22:30:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0574712643678161) internal successors, (276), 261 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 276 transitions. [2023-02-13 22:30:42,744 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 276 transitions. Word has length 151 [2023-02-13 22:30:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:30:42,744 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 276 transitions. [2023-02-13 22:30:42,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 36 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 276 transitions. [2023-02-13 22:30:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-13 22:30:42,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:30:42,745 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:30:42,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-13 22:30:42,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:30:42,946 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:30:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:30:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1791121938, now seen corresponding path program 18 times [2023-02-13 22:30:42,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:30:42,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122371015] [2023-02-13 22:30:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:30:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:30:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:30:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-02-13 22:30:43,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:30:43,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122371015] [2023-02-13 22:30:43,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122371015] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:30:43,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548454917] [2023-02-13 22:30:43,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:30:43,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:30:43,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:30:43,207 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:30:43,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-13 22:30:43,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-13 22:30:43,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:30:43,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-13 22:30:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:30:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-02-13 22:30:43,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:30:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-02-13 22:30:43,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548454917] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:30:43,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:30:43,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-02-13 22:30:43,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394881169] [2023-02-13 22:30:43,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:30:43,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-13 22:30:43,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:30:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-13 22:30:43,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2023-02-13 22:30:43,666 INFO L87 Difference]: Start difference. First operand 262 states and 276 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:30:44,087 INFO L93 Difference]: Finished difference Result 276 states and 290 transitions. [2023-02-13 22:30:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-13 22:30:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2023-02-13 22:30:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:30:44,088 INFO L225 Difference]: With dead ends: 276 [2023-02-13 22:30:44,088 INFO L226 Difference]: Without dead ends: 176 [2023-02-13 22:30:44,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 280 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2023-02-13 22:30:44,089 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 628 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:30:44,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 43 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 22:30:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-13 22:30:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 168. [2023-02-13 22:30:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0538922155688624) internal successors, (176), 167 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2023-02-13 22:30:44,142 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 153 [2023-02-13 22:30:44,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:30:44,142 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2023-02-13 22:30:44,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:30:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2023-02-13 22:30:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-02-13 22:30:44,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:30:44,144 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:30:44,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-13 22:30:44,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:30:44,352 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:30:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:30:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -141283940, now seen corresponding path program 19 times [2023-02-13 22:30:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:30:44,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422723752] [2023-02-13 22:30:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:30:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:30:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat